Dellorto Jets

March 18, 2021

 

4, 5, or 6 millimeter

 

Thread Size: Dellorto jets in mopeds come in three thread sizes 4, 5, and 6 millimeter. Each thread size has maybe a hundred different jet sizes. They all fit and look the same but have different size pin holes. 

 

 

Left, genuine (with “diamond INC” logo)
Right generic (with different or no logo)

Jet Number: Jets have a number stamped on them indicating the hole size. The number can have different meanings for different jet makers.

For generic Dellorto jets the jet number is the mm size.
A generic Dellorto 60 is 0.600 mm.

For genuine Dellorto jets the jet number is less than the mm.
A genuine Dellorto 60 is 0.627 mm.

So a genuine 60 is in-between a generic 62 and 63.
This sounds wrong but is true!

 

How this was determined: Below is a graph of 17 genuine Dellorto 5mm jets actual sizes. The direct measurement was done with a set of machinists wire gauges, in increments of 0.001″. You can see how the measured sizes fall nicely on two lines. The line for over-56 has less slope than the line for under-56. You can also see what drill sizes correspond to what jet sizes. This study was done in 2002 before there were generic jets. It was surprising to learn that the stamped number did not mean the millimeter size.

Dellorto Jet Sizes Graph, drawn in 2002

Genuine 6413 (6 mm) Jets (M6-0.75 thread)
genuine       closest generic

##  inch size mm   ##     price
    applications
51 0.0215″=0.550  55  $4.00 generic 55 (= Dellorto 51)
52 0.0219″=0.556  56  $6.00 A55 smaller for high altitude
54 0.0228″=0.580  58  $4.00 generic 58 (= Dellorto 54)
55
 0.0231″=0.587  59  $8.00 Tomos A55 243160 original
56 0.0236″=0.600  60  $4.00 generic 60 (= Dellorto 56)
58 0.0242″=0.615  61  none  
59 0.0244″=0.620  62  $4.00 generic 62 (= Dellorto 59)

60 0.0247″=0.627  63  $6.00

Genuine 1486 (5 mm) Jets (M5-0.75 thread)
genuine       closest generic
##  inch size mm   ##    price
    applications
42 0.0178″=0.451  45   $5.00
43
0.0182″=0.462  46   none   pre-78 Ciao & Bravo
44 0.0186″=0.472  47   $5.00
45 0.0190″=0.483  48   none   78-on Ciao & Bravo
46 0.0194″=0.493  49   $5.00
47 0.0198″=0.503  50   $7.00
48 0.0202″=0.513  51   $5.00 most 20mph mopeds
49 0.0207″=0.525  52   $7.00 78-83 Vespa Grande

Dellorto Jet Sizes Graph, improved in 2019

50 0.0210″=0.533  53   $5.00 76-80 Garelli (some)
51 0.0215″=0.546  55   $7.00 85-91 Tomos A3
52 0.0219″=0.556  56   $5.00 almost all 30mph mopeds
53 0.0223″=0.566  57   none   92-06 Tomos A35
54 0.0227″=0.577  58   $5.00 86-90 Derbi (flat reed)
54 0.0227″=0.577  58   $3.00 generic jet, no INC logo

55 0.0231″=0.587  59   none  
56 0.0235″=0.597  60   $5.00
57 0.0239″=0.607  61   $7.00

58 0.0242″=0.615  62   $5.00
60 0.0247″=0.627  63   $5.00
62 0.0255″=0.648  65   none  
64 0.0262″=0.665  66   none  
66 0.0268″=0.681  68   none  
68 0.0274″=0.696  70   none  
70 0.0280″=0.711  71   none  

Genuine 11600 (4 mm) Jets (M4-0.70 thread)
genuine       closest generic

##  inch size mm   ##   price
    applications
25
0.0107″=0.272  27  $8.00  Tomos A55 pilot jet
29 0.0124″=0.314  31  $8.00
30 0.0128″=0.325  33  $8.00  good for A55 pilot jet
32 0.0140″=0.355  35  $8.00  same as #80 drill
35 0.0149″=0.378  38  N/A
40 0.0170″=0.431  43  $8.00
42 0.0178″=0.451  45  N/A
44 0.0187″=0.475  47  N/A
45 0.0190″=0.483  48  $8.00
48 0.0202″=0.513  51  $8.00  Sachs 504/1A and 505/1A
50 0.0210″=0.533  53  N/A
55 0.0230″=0.580  58  $8.00
60
 0.0250″=0.635  63  $8.00

 

Clone Carbs: Some Dellorto SHA clone carburetors have a different jet thread, M5-0.8. But the Runtong (China) SHA clone has the same thread M6-0.75.

 


Dellorto SHA Vespa

March 18, 2021

Welcome. The Dellorto “SHA Vespa” is like a regular “SHA” but more compact. It has a smaller 50mm air filter flange, not 59. This style of carburetor was original on all Vespa/Piaggio mopeds 1970’s, 1980’s, 1990’s, and 2000’s. In the USA it was on 1972-86 Vespa mopeds, 1983-86 Garelli VIP-N, and mid 1990’s Kinetic TFR mopeds. 

The SHA Vespa carburetor has an improved choke release trigger, that cures the sticking trigger lever problem that the regular early SHA had. Vespa types have a sliding push rod, that moves up a ramp in the throttle slide when the throttle is raised fully. The solid rod pushes the choke lever/plate over a little stop tab. The torsion spring is then free to snap it back off. The top is relatively easy to put on, with only the throttle slide and spring to install, no choke device that gets damaged easy, not even a top gasket.

   ID number xxx  choke  approx.  clamp  xxx  fits on
  xxxxxx size xxxxx type x  years xsize  sleeve intake
  stock jets    applications
SHA 12/7
 xxxx0x lever  1960-90  18   18-16  16.00  39, 40, 00  20mph Vespa mopeds
SHA 12/
10 xxxxx lever  1960-90  18   18-16  16.00  00, 43, 45  25mph Vespa mopeds
SHA 12/
12 xxxxx lever  1960-90  18   18-16  16.00  00, 00, 48  30mph Vespa mopeds
————————————————  replacement carburetors  ———————————-
SHA 12/10
 xxxxxlever 1990-on  18   18-16  16.00  00, 00, 48   comes with 18-16 sleeve
SHA 12/10
 xxxxx lever  1990-on  18 .
none   18.00  00, 00, 48   remove sleeve
SHA 13/13
xxxxx lever 1990-on  18   18-16  16.00  00, 00, 48   comes with 18-16 sleeve
SHA 13/13
 xxxxx lever 1990-on  18 . none   18.00  00, 00, 48   remove sleeve

 

There were 3 carb bodies, 7, 10, and 12mm, 5 jet sizes, 39, 41, 43, 45, 49, and 2 air filter boxes, 3-hole and 6-hole.
The Boxer had a side-pull carb top assy, like Peugeot. It gives more frame clearance. After 1979 the Boxer became the Si. 
There were 4 choke levers, Grande, Bravo, Ciao, Boxer. The later Boxer 2 had the linkage type choke with pull wire.

 

1980s Vespa Carburetors

There are 3 carb bodies, 7, 10, and 12mm, 4 jets, 39, 42, 45, 49.
The Ciao P and Bravo P had top pull, and Si had a side-pull carb top assy.
There are 3 choke levers, Bravo-Ciao, and Si, linkage type, and Grande.
There are 2 air filter boxes, 3-hole and 6-hole. Some are newer designs.

 

Prices in green are for new, dark green are for used items.

#  Piaggio# price    description            remarks
00 000000 $48.0 SHA 12/12 bare body  Grande 25 & 30mph
00 000000 $40.0 SHA 12/10 bare body  Ciao, Bravo, Si 25 & 30mph
00 000000 $38.0 SHA 12/7   bare body  Ciao, Bravo, Grande, Si 20mph
01 098128 $5.00 adjuster A13 with nut M6-0.75
02 120074 $3.00 lock nut M5-0.75           special thread
03 113903 $6.00 cable pipe 2ar replica
04 120073 $3.00 lock nut M6-0.75
05 113906 $2.00 top screw M4-0.75 x 14 flat
06 113902 $12.0 carb top top-pull type, there’s no carb top gasket
07 113901 $10.0 spring throttle Ø11 x 26
08 135734 $15.0 throttle slide 21x26x3  has a ramp to release choke 
09 124753 $3.00 rubber washer 2x7x1.5 slips into a pocket from the side
10 124598 N/A     slide rod Ø2 x 35          like Peugeot (28mm) but bigger
11 124597 N/A     rocker arm Ø5 hole
12 092403 N/A     step bolt Ø5 x 2 step, M4-0.75 x 10 shank
13 016320 $0.50 thin washer M5
14 014404 $0.50 lock washer M4
15 012012 N/A     nut M4-0.75              not a regular M4-0.70
16 124752 N/A     screw M4-0.75×10 sunk  can be a flat head
17 098130 $3.00 spring Ø5 x 7 x 12 
18 098128 $6.00 cable adjuster M5-0.75
19 124596 N/A     carb top side-pull type #1 to 19 is “carb top” assy
21 133921 $6.00 choke lever Ciao            21 to 49 is “bottom” assy
22 353882 $15.0 choke lever Grande
23 140342 $17.0 choke lever Bravo     very long
24 113917 $10.0 inlet bolt M5-0.75 x 18  can not be normal M5-0.80
25 082920 $2.00 seal washer 5 x 8           can not be normal 5 x 10
26 113914 $7.00 banjo fuel inlet
27 113916 $6.00 fuel filter  Ø11 x 8
28 113915 $6.00 seal washer 11 x 16
29 114482 $17.0 intake sleeve 16 x 18 smaller than 20mm, regular SHA
29 222222 $2.00 rubber washer 12x18x2 not for 70’s Vespa moped
30 113926 $5.00 bolt M6-1.0 x 20             special small head
31 113927 $0.80 thin nut M6-1.0
32 113923 $4.00 spring for choke plate  torsion spring
33 113922 $4.00 pivot bolt choke            shoulder bolt
34 098135 $2.00 spring for idle screw
35 113919 $4.00 idle screw M4-0.70
36 164149 N/A     choke pull rod            Bravo P, Si
37 188772 N/A     choke pull rod            Ciao P
38 186413 N/A     coupling pipe (clip)  Si, Ciao P, Bravo P
39 212930 N/A     bracket                        Bravo P
40 188164 N/A     bracket                        Ciao P
41 164147 N/A     choke plate long flat    Si
42 188162 N/A     choke plate short bent Ciao P, Bravo P
43 120519 N/A     jet 39  20mph ’78-on Ciao, Bravo, Grande, Si, Ciao P
43 135233 N/A     jet 41  25mph ’80-83 Si, 30kph ’84-86 Bravo P
43 191125 $5.00 jet 42  25mph ’80-86 Ciao P
43 113912 none   jet 43  30mph ’80-86 Si, ’68-77 Ciao, ’72-77 Bravo
43 010101 $5.00 jet 44
43 130525 none   jet 45  30, 25mph ’78-83 Ciao, Bravo
43 010101 $5.00 jet 46
43 158780 $7.00 jet 49  30, 25mph ’78-85 Grande,
43 158780 $0.00 jet 49  30mph ’84-86 Ciao P, Bravo P, Si
43 010101 $5.00 jet 50

Vespa air filters L, 3-hole, R, 6-hole. Row 1 covered: L Kinetic, R Grande. Row 2 open: L, Ciao, R, Ciao P

Vespa air filters: L 3-hole, R 6-hole.
Row 1 covered: L Kinetic, R Grande
Row 2 open: L Ciao, R Ciao P

44 090506 $10.0 float needle L=17.0 photo
45 113910 $10.0 float all plastic says 2.5 grams 7420.1
46 113909 $2.00 gasket float bowl
47 085291 $2.00 hinge pin Ø2.0 x 16.5
48 113908 $12.0 float bowl metal
49 098134 $4.00 bowl screw M4-0.75 x 18
50 131009 $7.00 air filter screen
51 113055 $12.0 clamp air filter w/screw
53 113347 $35.0 air filter 3-hole open     68-80 Ciao,Bravo(20,25,27)
54 306922 $50.0 air filter 6-hole covered 78-86 Grande (20, 25, 30)
55 183423 $60.0 air filter 6-hole open     81-86 Ciao PX (30mph)
56 186886 N/A     air filter 3-hole open     80-86 Si, Ciao PX (20, 25)
57 000000 $40.0 air filter 3-hole covered 95-99+ Kinetic TFR

 

 


Morini Engine Models

March 10, 2021

Table of Contents

1. 1950’s   47.7cc     2,3-speed vert. all-iron cyl. ∅38.0          P48, P3 (FBM)
1. 1950’s   47.7cc     2,3-speed vert. all-iron cyl. ∅38.0           2M, 3M
2. 1960’s   47.7cc  1,2,3-speed vert. all-iron cyl. ∅38.0  F48, 2M, 3M, 2B, 3B
3. 1960’s   49.6cc   3,4-speed vert. all-iron cyl. ∅38.8
  3CV, 4MP, 4MP-S, 4CL-S
4. 1970’s   49.0cc    1, 2-speed horiz. cylinder     ∅40.0  Gyromat, Convert
4. 1970’s   49.0cc  1,2,4-speed horiz all-iron cyl. ∅40.0  MO, Convert, MO4

4. 1970’s   49.9cc1,2,4-speed horiz. cylinder     ∅40.4  MO1, MO2, MO4, Gyrokick
4. 1970’s   49.9cc1,2,4-speed horiz all-iron cyl. ∅40.4  MO1, MO2, MO4, Gyrokick

5. 1970’s   47.7cc    one-speed vert. all-iron cyl. ∅38.0  S5K, S5K2
5. 1970’s   49.55cc  one-speed vertical cylinder  ∅39.0  S5R, S5E

6. 1980’s   49.9cc1,2,3-speed horiz. cylinder     ∅40.4  M1, M101, M1K, MO3
6. 1980’s   49.9cc    one-speed horiz all-iron cyl. ∅40.4  M1, M1K

7. 1980’s   49.55cc  one-speed vert all-alum cyl  ∅39.0  S5N, S5T

8. 1990’s   49.9cc    one-speed horiz. cylinder     ∅40.4  M1K
9. 1990’s   49.55cc  one-speed vert all-alum cyl  ∅39.0  S5GS

This is only about half of all the Morini 50cc engines. 

 

 

 


1. 1950’s 50-70cc 2, 3-speed vertical-cylinder engines

 

1954 FBM P3 kick start
47.7 cc (38 x 42) 3-speed

1954 FBM P48 pedal start
47.7cc (38 x 42mm) 2-speed

The first Morini and Minarelli engines in 1956-58 were mostly the same as 1954-55 Moto FBM. These 1950’s models have very rounded head fins.

1956? Morini 2M 2-speed hand-grip-shift
47.7 cc, 38.0 mm bore, 42.0 stroke

 

 

 

 

 

 

 

 

 

1958? Morini 2M pedal start
47.7 cc (38 x 42) 2-speed hand-shift

 

 

 

 

 

 

 

 

1960 Morini 70cc 3-speed foot shift

 

 

 

 

 

 

 

 

 

 


2. 1960’s 50cc 1, 2, and 3-speed vertical-cylinder engines

1961 Morini F48 1-speed with pedals

50’s look: The 1956-61 Franco Morini F48 1-speed looks like it’s predecessor, the 1954-55 Moto FBM P48 Pettiroso 2-speed. It has the rounded 1950’s head fins. But the F48 has no shift cable attachments and no foot shifter. That distinguishes it from the others that change gears. Otherwise it looks the same.

It is not yet known if the 1961 Morini F48 was automatic clutch or manual clutch (or both). Both types have clutch cables, and look the same on the outside. By 1968 it was automatic.

New logo: The earliest photo of the hourglass logo was this F48 from 1961.

 

Newer fins: The 1962-66 50cc motors below have the 1960’s style head fins, taller in front and less rounded (except for fan-cooled types). The shape of the cooling fins and engine case can indicate the year range. Newer fins are bigger and more square, less rounded. Newer engine cases are less rounded. 

1962? Morini 3M
3-speed hand-shift, 48cc, 55km/h
Dellorto T4 12 S1 carburetor (12mm)
47.7 cc, 38.0 mm bore, 42.0 stroke

1962? Morini booklet

1962? Morini F48 (pedals)
1-speed manual clutch 48cc, 40km/h
Dellorto T4 9 S1 carburetor (9mm)
47.7 cc, 38.0 mm bore, 42.0 stroke

 

 

 

 

 

 

 

 

 

 

 

 

 

1963? Morini 3M (pedal version)
47.7 cc (38.0 x 42.0) 3-spd hand-shift
export version 1.4 hp 40 km/h
Dellorto SHA 14/9 carb (9mm)

1964 Morini 3M (pedal version)
47.7 cc (38.0 x 42.0) 3-sp hand-shift
normal version 2.2 hp. 50 km/h
Dellorto SHA 14/12 carb (12mm)

1964 Morini 3M series

 

 

 

 

 

 

 

 

 

 

 

 

1964 Morini 3M parts
export version 1.4 hp 40 km/h
47.7 cc (38.0 x 42.0 mm)

1964 Morini 3M parts
clutch and transmission
47.7 cc (38.0 x 42.0 mm)

1964 Morini 3CV parts
(parts different from 3M)
49.6 cc (38.8 x 42.0 mm)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1965 Morini 3CV fan-cooled 
3-speed foot-shift, kick-start
49.6 cc (38.8 x 42.0 mm)

1968 Morini 3 MCL/SP 49cc 3.8hp kick-start
3-speed grip-shift, Dellorto racing type carb

 

 

 

 

 

 

 

 

 

 

 


3. 1960’s 50cc 4-speed vertical-cylinder engines

1967 Morini 4 CLS 49.6 cc 4 hp kick-start
4-speed foot-shift, fan-cooled sport bike

Some time in the mid-1960’s, starting with the 3CV, the bore increased from 38.0 to 38.8mm. The piston and rings got bigger, but the rings also got thinner.

1969 Morini 4 MP/S Turbo
50cc 5 hp 4-speed foot-shift

1967 4 MP/S Turbo

 

 

 

 

 

 

 

 

1967? Morini 4 MP/S Turbo parts view
4-speed foot-shift kick-start
49.6 cc, 5 hp, 38.8 mm bore, 42.0 stroke

 

1972 Morini P4/S 49.6 cc 3.5?hp 4-speed

 

 

 

 

 

 

 

 

 

 

 

 

 


4. 1970’s 50cc 1, 2-speed horizontal cylinder engines

It’s hard to find info about these. Like other Morini and Minarelli engines, the engine identity is concealed or replaced with the bike maker name. The bike maker flyers are the best source of official photos and information.

1968 Morini ??? horizontal cylinder
49.0 cc (40.0 x 39.0) 1-spd manual clutch, 7.5 cr
1970-type aluminum cylinder steel sleeve 40.0
normal version 1.4 hp. 40 km/h
Dellorto SHA 14/12 carburetor (12mm)

1968 Malaguti line

The first horizontal-cylinder Morini one-speed moped engines were not automatic. The 1968 Malaguti flyer shows this. The Dribbling model with horizontal cylinder says “monomarcia” (one speed), while the Nuovo Europino vertical cylinder model says “monomarcia a frizone automatico” (one speed automatic clutch).  

1970-type aluminum cylinder: The late 60’s and early 70’s horizontal aluminum cylinders with all-horizontal fins, have a standard bore of 40.0 mm. 

iron cylinder: These cylinders are cast iron, darker, heavier, with top and bottom fins vertical and side fins horizontal. From the front view, the fins resemble a very thick plus sign. This all-iron cylinder replaced the 1970-type iron-sleeved aluminum cylinder in the early 70’s. At first in the early 1970’s the iron cylinder had a 40.0 mm standard bore, so it would interchange with the 1970-type. Later in the mid-1970’s it had a 40.4 mm standard bore, so it would interchange with the 1977-type. But not all changed to 40.4 in the mid 70’s. Some remained 40.0 bore into the late 1970’s. Some late 1970’s owners manuals specified 40.0 mm bore: 1976 NVT Easy Rider ER1, ER2, 1977 Intramotor-Gloria Scout. Most others of this period specified 40.4 mm. 

1977-type aluminum cylinder: These were iron sleeve aluminum cylinders with bigger fins, thicker plus sign style. They were made from the early 1970’s to about 1980. Most have a 40.4 bore, but some might have been made with 40.0 bore. That is what is shown and stated in the manuals mentioned above. Maybe 1 out of 10 Morini 1977-type cylinders on US models are 40.0. About 9 out of 10 are 40.4.

 

1969? Morini Gyromat, horiz. cyl with pedals
49.0 cc (40.0 x 39.0) 1-speed automatic, 7.5 cr
1970-type aluminum cylinder steel sleeve 40.0
normal version 1.4 hp. 40 km/h (26 mph)
Dellorto SHA 14/12 carburetor (12mm)

Gyromat: In about 1969 a new series of engines began, called Gyromat. These were pedal-start horizontal-cylinder one-speed automatic clutch Franco Morini moped engines.

Convert: In the mid-1970’s Morini developed a two-speed automatic version of the Gyromat, called the Convert. A Morini Convert is the precursor of the Morini MO-2.

Gyrokick: In the mid-1970’s Morini produced a kick-start version of the Gyromat, called the Gyrokick. 

1972? Morini Gyromat
1-speed automatic, pedals
1970-type alum cylinder 40.0

1975? Morini Convert
2-speed automatic, pedals
iron cylinder 40.0 or 40.4

 

 

 

 

 

 

 

1973? Malaguti Duomatic
same as Morini Convert
1970-type alum cylinder 40.0

1972? Itom Automatic
same as Morini Gyromat
1970-type alum cylinder 40.0

1976? Morini Gyrokick  horiz. cyl, kick-start
49.9cc (40.4 x 39.0) 1-speed automatic, 7.5 cr
1977-type aluminum cylinder steel sleeve 40.4

 

 

 

 

 

 

 

 

1976 Morini Gyromat MO1
iron cylinder 40.0 or 40.4

1978 Morini Gyromat MO1
1977-type alum cylinder 40.4

 

1978 Morini MO1
1977-type alum cylinder 40.4

 

 

 

 

 

 

 

 

 

 

 

 

Morini MO and MO1

 

 

 

20-0012 inner side

20-0012 with 13-5031

20-0012 outer side

27-0005a

 

 

 

 

 

 

 

 

12-7020

12-7014

Morini Pistons Nov 2013

 

 

 

 

 

 

 

 

 

 

 

MO2 exploded view

 

 

 

MO1 and MO2 Speed Versions – Differences

30mph 2.2hp 13T sprocket, 14/12 carb, Ø13 intake, same cylinder, 5mm piston skirt cut
25mph 1.4hp 12T sprocket, 14/12 carb, Ø12 intake, same cylinder, 3mm piston skirt cut
20mph 1.0hp 12T sprocket, 14/ 9  carb,  Ø9  intake, restricted cyl., 3mm piston skirt cut

 

 

 

1975? Morini MO4 horiz. 4-speed foot-shift
49.0 cc (40.0 x 39.0) 1-speed automatic,
iron cylinder 40.0 or 40.4 bore

1970 Morini MO4 horizontal 4-speed on Cimatti Mini Chic
49.0 cc (40.0 x 39.0) 1-speed automatic, foot-shift,
1970-type aluminum cylinder steel sleeve 40.0 bore
Dellorto SHB 18/15 carburetor (15mm)
Dansi magneto ⇐ MSL 168 7936B/63

 

 

 

 

 

 

 

 

 

 

 

 


5. 1970’s 50cc 1-speed vertical cylinder engines

1968-72 Morini S5K, 1-speed automatic 47.7cc (38.0 x 42.0)
from 1972 Indian JC5A, MM5A Parts Manual

S5K: The 1968? to 1972? Morini S5K had the same cast-iron cylinder and piston and head from the early 1960’s. The connecting rod had a brass bushing for the piston pin. The right-side kick start operates backward.  

1970 Morini S5K  1-speed automatic
backward kick, 47.7 cc, 2.2 or 1.4 hp
38.0 bore, 42.0 stroke, 6.5 comp. ratio

 

 

 

 

 

 

 

 

 

 

 

MF logo: The above logo says MF (Morini Franco), very stylized, and very 70’s, all straight lines.

S5K2: The 1972? to 1978? Morini S5K2 has improvements over the S5K. It has a needle bearing for the piston pin, instead of a brass bushing. It has a right-side kick start lever that operates forward, with an external return spring and improved mechanism.

Manufacturers that have used this 1970’s S5 engine, or the 1980’s to late 1990’s S5 versions, are as follows: Italjet/Indian, Malaguti, LEM, KTM, Husqvarna, DBM, Young Rider plus many others.

1974 Morini S5K2 1-speed 
47.7 cc automatic, forward kick
38.0 bore, 42.0 stroke, 6.5 cr
normal version 2.2 hp. 50 km/h
Dellorto SHA 14/12 carb (12mm)

1972-78? Morini S5K2, 1-speed automatic 47.7cc (38.0 x 42.0)
from 1974? Italjet M5A Parts Manual with 1978 late items added

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1974 Morini S5K2 1-speed 
47.7 cc automatic, forward kick
38.0 bore, 42.0 stroke, 6.5 cr
slow version 1.4 hp. 40 km/h
Dellorto SHA 14/9 carb (9mm)

Left, 1972?-78? Morini S5K2
Mid 1969-79 Minarelli V1 1hp 
Mid 1951-55 FBM P48, P2, P3
Mid 1956-68? Morini F1, P3 Right, 1972-78 Sachs 504
All are 38mm and interchange.

 

Sachs design: The S5K2 piston is an old design used by Morini and Minarelli since before their beginnings. It is 38.0mm diameter, very tall (22mm) above the wrist pin (12mm) and short below (17mm). But why are these early Italian 50cc pistons the same dimensions and design as German pistons made by Sachs?

In the early 1950’s Vittorio Minarelli visited Fichtel and Sachs in Austria to learn about moped engines. When Minarelli returned he began building engines, along with partner Franco Morini, at FBM in the 1950’s. The Italian engineers used many of German engineer Ernst Sachs production methods and knowledge, like casting and metallurgy, and design principles, like bore and stroke, port timing, sizes and thicknesses, geometry, etc.

 

 

 

 

 

1979 Morini S5E

Morini S5E and S5N, 1-speed automatic 49.6cc (39.0 x 41.5)

 

 

 

 

 

 

 

S5E, S5R piston 23-0133D

 

 

 

 

 

 

 

1978 Morini S5R “radiale” engine
49.6 cc 1-speed automatic, aluminum cylinder
39.0 mm bore, 41.5 mm stroke, 9.0 comp ratio
5.0 horsepower, Dellorto SHB 19/19 carb

 

S5E: In the late 1970’s the S5E “Electronic” replaced the S5K2. It had an electronic ignition system instead of points ignition system. The S5E still had a cast iron piston-port cylinder, but the fins were bigger and completely square, like a 70’s Volvo! The piston changed from a 1950’s design 38mm with two thick rectangular (regular) rings, to a late-70’s 39mm with upper L-type (Dykes) ring. The crankshaft changed from 42mm stroke to 41.5, and the piston pin small brass bushing became a bigger needle bearing. Other things changed, like the forward-kick lever became aluminum. But the rest of the S5E engine and transmission remained mostly the same as S5K2. This is apparent from the illustration. 

S5R: In the late 1970’s the S5R “Radiale” was a sport version of the S5E. It had a piston-port aluminum cylinder with very big fins and a distinctive radial-fin head.  The exhaust header pipe passed through the right side engine fins. It had a bigger carburetor and intake manifold than the S5E. Serious power for an 8-year-old, without any gear shifting!

 

 


6. 1980’s 50cc 1, 2-speed horizontal cylinder engines

M1: In 1979 Morini came out with the M1 engine, a one-speed with a case-type reed valve. The reed valve induction produced about 20-30% more torque. The result was acceleration about the same as a MO-2 two-speed, but at a much lower cost and complexity. So by about 1980, both the MO-1 and MO-2 were discontinued in favor of the M1.

Morini M1

 

 

 

 

M101: In 1981 the two-speed M101 came out, a variator-transmission belt-drive engine with a M1 top-end (cylinder, piston and head). The variable-ratio-pulley transmission resulted in increased acceleration over the fixed-ratio M1. The price increased and so did the weight and case length.

Morini M101

 

 

 

1983 – 1985 Morini MO3
3-speed cable-shift, kick-start

 

 

 

 

 

 

 

 

 

 

 


7. 1980’s 50cc 1-speed vertical cylinder engines

Morini S5N

Morini S5E, S5ET, S5NG, S5NG4

Morini 1980’s – 90’s S5 pistons

 

 

 

 

 

 

 

 

S5N: In the early 1980’s the S5N replaced the S5E. The S5N had an aluminum piston-port cylinder, lighter in color but with the same fins. The piston design changed from L-type upper ring to both rectangular thin 39 x 1.0. The thin rings made better compression at high rpm.

S5T: In the mid 1980’s the S5T replaced the S5N. The S5T had a reed valve in the cylinder, and much bigger cooling fins. With the reed valve the intake air mixture can flow through a window in the back side of the piston, and the cylinder can have additional transfer ports on the intake side. Those benefits outweigh the extra restriction of the reed valve.

Morini S5T, reed-valve cylinder

Morini S5T

 

 

 

 

 

 

 

 

 

 

 

 

 

 


8. 1990’s 50cc 1-speed horizontal cylinder engines

The Morini M1 was still in production in the 1990’s

 

 

 


9. 1990’s 50cc 1-speed vertical cylinder engines

Morini S5GS

Morini S5GS

S5GS: In the early 1990’s the S5GS replaced the S5T. It had larger cooling fins, larger carburetor, and a bigger reed valve with more reed petals, 4-reed instead of 2-reed.

Manufacturers which have used this engine include: Husqvarna, KTM (pre 2001), LEM, Rivara and DBM. The Husqvarna version of this engine was fitted with an O-ring head gasket & thicker base gasket in later years.

 

 

 

 

 

 

 

 

 

 


Piston Rings

March 5, 2021

 

Listed as: D x h x w xxx Listed as: D x h1/h2 x w xxx Listed as: D x h1/h2 x w1/w2 xxx Listed as: N or  I xxxxxxxxxxx

GN gap (aka FG)
pin on side of groove

 

Meanings:
D
is the cylinder diameter that the ring would have a 0.004 to 0.008″ gap in
height is the thickness up-and-down. T & L rings have 2 heights, outer & inner
width is the depth inward-and-out. L rings have two widths, outer and inner
type C = Common “square”  shape (cross-section)
type T = Trapezoidal “slant top” shape (cross-section)
type L = L-shape  aka  “Dykes”  shape (cross-section)

GI gap style
pin inside groove

gap GN Grano Normale gap style is for ring pin on side of ring groove
gap GI  Grano Interno = gap style is for ring pin in center of ring groove
gap (blank) is for L-ring gap style, ring is like a GI but groove is like a GN
price is for each ring, unless noted.  All rings are for 50cc engines, unless noted.

                           R I N G S

0  size x height x width  type gap price     part number  applications
36.50
 x 1.50 1./x 1.7/0.7  C  N  $10.0 0 0000  222812 Tomos MC36 36cc
38.00 x 1.50 1./x 1.7/0.7  C   I   $10.0 0 0215.100.100 Sachs 1979-on 504,505 1C,1D upper
38.00 x 1.50 1./x 1.7/0.7  C  N  cont..  00.. 000000000 Zanetti (front engine)
38.00 x 1.5/1.3 x 1.60 /7  T  N  $17.0 0..0000 223707 Tomos A55 (2001-06) superseded in ’07 to 236802
38.00 x 1.50 1./x 1.7/0.7  C  N  $$9.0 0..0000 236802 Tomos A35 (1991-06), Tomos A55 (2007-on)
38.00 x 1.50 1./x 1.7/0.7  C  N  cont..  0 000.672.5110 Derbi 1976-1986 lower only, Odyssey, Solo
38.00 x 2.0/1.0 x 1.5/0.5  L  N  $10.0 0 000.802.5110 Derbi 1976-1986 upper (fits Puch loose inner)
38.00 x 2.0/1.0 x 1.7/0.7  L  N  $21.0 0 328.110.9601 Puch 1979-1980 deluxe models upper
38.00 x 2.00 1./x 1.7/0.7  $13.0 0 331.110.1601 Puch rounded edge for aluminum cylinder
38.00 x 2.00 1./x 1.7/0.7  $$9.0 0 320.110.0601 Puch except some ’79-80 upper
38.00 x 2.00 1./x 1.7/0.7  C  N  cont..  0 0215.009.000 Sachs 504, 505 1A,1B both, 1C,1D lower
38.00 x 2.00 1./x 1.7/0.7  C  N  cont..  0..0000 044754 Tomos A3 1975-1990, AMF BHE900 rear engine
38.00 x 2.00 1./x 1.7/0.7  C  N  cont..  00.000 26.1001 Morini S5K, S5K2, 2M, 3M, F48
38.00 x 2.50 x 1.50.7/0.7  C  N  $11.0 71.0802.0 4600 Minarelli V1 1hp 20mph, Sears Allstate, early Puch
38.00 x 2.50 1./x 1.7/0.7  C flat  N/A     0.00000000000 Solex 45cc 1946-1954  use 38.00 x 2.50 C N
38.20 x 1.50 1./x 1.7/0.7  C  N  $10.0 0..0000 182518 Piaggio 79-later & some 78s lower ring
38.20 x 2.00 1./x 1.7/0.7  C  N  $16.0 00..000 166945 Piaggio 78-80 USA-type, must file down a 077775
38.00 x 2.00 1./x 1.7/0.7  C  N  cont..  0000.0 26.1002 1os Morini S5K, S5K2, 2M, 3M, F48
38.20 x 2.0/1.0 x 1.8/.75  L  N  $14.0 0..0 000182519 Piaggio 79-later & some 78s upper ring
38.20 x 2.50 x 1.50.7/0.7  C  N  none.. 71.0852.7 4610 Minarelli 1os V1 1hp 20mph, Sears Allstate, early Puch
38.25 x 2.00 1./x 1.7/0.7  C  N  $16

38.25 x 2.0/1.0 x 1.5/0.5  L  N  $11.0 000.802.5110 1os Derbi 1976-1986 upper ring
38.25 x 1.50 1./x 1.7/0.7  C  N  $15.0 0 000.672.2511 1os Derbi lower
38.40 x 1.50 1./x 1.7/0.7  C  N  $14.0 00 000  132515 std or 1os Piaggio lower ring, 79-later & some 78s
38.40 x 1.5/1.3 x 1.60 /7  T  N   N/A    0 000   3010010 Kinetic TFR (Vespa Si remake) 95-later
38.40 x 2.00 1./x 1.7/0.7  C  N  $12.0 0 0000  077775 Piaggio 77-earlier & some 78s, early Kinetic
38.40 x 2.0/1.0 x 1.8/.75  L  N  none.. 0 000   G.68473 std or 1os Piaggio upper ring, 79-later & some 78s
38.40 x 2.50 x 1.50.7/0.7  C  N  $9.00 71.0852.7 4620 Minarelli 2os V1 1hp 20mph, Sears Allstate, early Puch
38.50 x 1.50 1./x 1.7/0.7  C  N  $12.0 0 0000  227758 1os Tomos A35
38.50 x 2.00 1./x 1.7/0.7  C  N  $10.0 0 0000  044751 1os Tomos A3
38.60 x 1.50 1./x 1.7/0.7  C  N  $9.00 000000 137693 1os or 2os Piaggio  
38.60 x 2.00 1./x 1.7/0.7  C  N  $14.0 0 00000  98196 1os Sachs 504, 505, 2os Piaggio 79- lower
38.60 x 2.0/1.0 x 1.8/.75  L  N  $13.0 0 00000 137690 1os or 2os Piaggio upper ring, 79-later & some 78s
38.70 x 1.50 1./x 1.7/0.7  C  N  $16.0 71.0803.0 4635 Minarelli V1 (US 1979-on and some ’78)
38.80 x 2.0/1.0 x 1.65/.6  L  N  $11.0  4.7470.5140 Demm Smily upper
38.80 x 1.50 x 1.50.7/0.7  C  N  cont..  0000 68.0116.0 Minarelli P4 (export al-cyl, Compact System, Radiale) upper
38.80 x 2.0/1.0 x 1.8/.75  L  N  $11.0  000000
137691 2os Piaggio upper ring
38.80 x 1.50 x 1.50.7/0.7  C  N  $10.0 71.0805.0 4640 Minarelli V1 (US to-1978)
38.80 x 1.50 x 1.50.7/0.7  C  N  cont..  0000 68.0115.0 Minarelli P4 (export iron-cyl, Sport Quadro) both
38.80 x 1.50 x 1.50.7/0.7  C  N  cont.. 
0000
68.0115.0 Minarelli P4 (export al-cyl, Compact System, Radiale) lower
38.80 x 1.50 x 1.50.7/0.7  C  N 
cont..  00.00   137694 2os Piaggio upper ring
38.80 x 1.50 1./x 1.7/0.7  C   I   N/A 00000   22350-65 Aermacchi Harley Davidson M50 1965-66 stroke 42
38.80 x 2.00 1./x 1.7/0.7  C  N  $10.0 00 4.7470.5100 Demm Smily lower
39.00 x 1.00 1./x 1.7/0.7  C  N  $19.0 0.000   26.1060 Morini S5N, S5GS kids off road, both
39.00 x 1.2/1.0 x 1.70 /7  T   I    N/A
   13011.GE2.305a Honda NS50 upper
39.00 x 1.20 x 1.85 /0..7  C   I   $10.0
13011.GE2.305b Honda NS50 lower
39.00 x 1.50 1./x 1.7/0.7  C  N  $10.0 71.0855.7 4650 1os Minarelli  V1, P4, P4 (alum cyl) lower
39.00 x 1.50 1./x 1.7/0.7  C  N  cont..   00.00  26.1044 Morini S5T, S5E, S5ET kids off road, lower
39.00 x 1.50 1./x 1.7/0.7  C   I   $10.0 0000 22351-65 1os Aermacchi Harley Davidson M50 1965-66
39.00 x 2.00 1./x 1.7/0.7  C   I   $12.0 000000   22148 Motobecane (after 06-76) Morini S5R lower
39.00 x 2.00 1./x 1.7/0.7  C  N  $10.0 000000   22148 Motobecane (before 07-75), DiBlasi mini-cycle
39.00 x 2.0/1.0 x 1.8/0.7  L  N  $19.0   00000 26.1003 Morini S5R, S5T alum. cylinder (upper ring)
39.03 x 2.00 1./x 1.7/0.7  C   I   $12.0 00 00  2812200 Jawa 207 1970-83 standard
39.20 x 1.50 1./x 1.7/0.7  C  N  $15.0 71.0855.7 4660 2os Minarelli V1, P4, P4 (al-cyl) lower
39.20 x 1.50 1./x 1.7/0.7  C   I   N/A    00000 22352-65 2os Aermacchi Harley Davidson M50 1965-66
39.25 x 1.2/1.0 x 1.70 /7  T   I   $19.013012.GE2.305a 1os Honda NS50 upper
39.25 x 1.20 x 1.85 /0..7  C   I   $10.0
13012.GE2.305b1os Honda NS50 lower
39.28 x 2.00 x 1.65 /0..7  C   I   $14.0 00 00  2812201 1os Jawa 207 1970-83
39.40 x 1.50 1./x 1.7/0.7  N   N/A    71.0855.7 4670 3os Minarelli V1, P4, P4 (al-cyl) lower
39.40 x 1.50 1./x 1.7/0.7  C   I   N/A   00000 22353-65 3os Aermacchi Harley Davidson M50 1965-66
39.40 x 2.50 1./x 1.7/0.7  C  N   N/A    000 0  0000000 Rizzato Califfo 1978 (Rizzato 119 engine)
39.50 x 1.2/1.0 x 1.70 /7  T   I    N/A   13013.GE2.305a 2os Honda NS50 upper
39.50 x 1.20 x 1.85 /0..7  C   I   $10.013013.GE2.305b 2os Honda NS50 lower
39.50 x 1.70 x 1.60 /0..7  C flat $10.0 00 0000  60817 Solex rings (3) no locating pins
39.53 x 2.00 x 1.65 /0..7  C   I   $19.0 00 00  2812202 2os Jawa 207 1970-83
39.60 x 1.50 1./x 1.7/0.7  C  N  $17.0 71.0855.7 4680 4os Minarelli  V1, P4, P4 (al-cyl) lower
39.80 x 1.50 1./x 1.7/0.7  C  N  $17.0 71.0855.7 4690 5os Minarelli V1, P4, P4 (al-cyl) lower
39.80 x 2.50 1./x 1.7/0.7  C  N 
$10    000 0  0000000 1os Rizzato Califfo 1978 (Rizzato 119 engine)
40.00 x 1.2/1.0 x 1.60 /7  T  N  $14.0 000 00  633086 China 49cc two-strokes upper, most
40.00 x 1.2/1.0 x 1.70 /7  T   I   $14 2W1.11610.0000a Yamaha YSR50 upper, PGO Star 50 upper, others
40.00 x 1.20 x 1.85 /0..7  C   I   $13 2W1.11610.0000b Yamaha YSR50 lower, PGO Star 50 lower, others
40.00 x 1.5/1.3 x 1.80 /7 
$14.0 13011.147.005a Dailim Trac, upper for Honda NC50,PA50,Yamaha QT50
40.00 x 1.50 1./x 1.7/0.7  C  N  $10.0 00 0000  55196 Batavus M48, M56, Trac (not Daelim), Flandria 
Bermuda
40.00 x 1.50 1./x 1.7/0.7  C  N 
cont..  13011.147.005b Honda lower for NC50,PA50, Yamaha QT50 lower
40.00 x 1.50 1./x 1.7/0.7  C  N 
cont..  000000   G7347 Benelli G2, 1965-75 Ward Riverside, Benelli mini-cycles
40.00 x 1.50 1./x 1.7/0.7  C  N 
cont..  00000  26.1044 Morini S5R, S5T alum. cylinder (lower ring)
40.00 x 1.50 1./x 1.7/0.7  C   I   $10.0  00000  551913 Morini MO Gyromat,Convert (early ’70s MO1,MO2)
40.00 x 1.50 1./x 1.7/0.7  C   I 
cont..     0F0.250.0111 Derbi 1986-1989 flat reed, Kreidler Flory
40.00 x 2.00 1./x 1.7/0.7  C  N  $10.0 00   307.021.00 Garelli all 1970’s, 00’s Avanti/Mont (most)
40.00 x 2.00 1./x 1.7/0.7  C  N cont..   00   307.021.00 Casal K177, 2000’s Hero Majestic Pacer
40.00 x 2.0/1.0 x 1.8/0.7  L  N   $11.0 00   310.001.00 Garelli Monza GT upper

40.00 x 2.50 1./x 1.7/0.7  C   I   $14.0 0000000  38315 Peugeot 102, 103 (almost all US models)
40.20 x 1.50 1./x 1.7/0.7  C  N  $22.0 0000   G7347/2 1os Benelli, 1os M Ward, filed down 40.25
40.20 x 2.00 1./x 1.7/0.7  C  N  $15.0 00   308.027.00 1os Garelli
40.25 x 1.00 1./x 1.7/0.7  C  N  $12.0 000..00 633087 1os China 49cc two-stroke scooter
40.25 x 1.5/1.3 x 1.80 /7  T  N   N/A    13021.147.005a 1os Honda NC50, PA50 upper
40.25 x 1.50 1./x 1.7/0.7  C  N  $15.013021.147.005b 1os Honda NC50, PA50 lower, 480511 1os Laura M48
40.30 x 1.50 1./x 1.7/0.7  C  N  $19.0 000000   4641b Minarelli V1HL and V1L lower, filed down 40.5
40.30 x 2.0/1.0 x 1.8/0.7  L  N   N/A    000000   4641a Minarelli V1L upper
40.40 x 1.50 1./x 1.7/0.7  C  N  none    0000   G7347/4 2os Benelli  G2, 2os M Ward and mini-cycles
40.40 x 1.50 1./x 1.7/0.7   I   $$9.0 00 00   26.1045 Morini MO1, MO2, MO4, M1
40.40 x 2.00 1./x 1.7/0.7  C  N  $12.0 0 0  308.028.00 2os Garelli
40.50 x 1.5/1.3 x 1.80 /7  T  N   N/A   13031.147.005a 2os Honda NC50, PA50 upper
40.50 x 1.50 1./x 1.7/0.7  C  N  $12.013031.147.005b 2os Honda NC50, PA50 lower, 2os Laura M48
40.50 x 2.50 1./x 1.7/0.7   I   $12.0 00 0000  33648 1os Peugeot 102, 103 (some, but none in CA)
40.60 x 1.50 1./x 1.7/0.7  C  N  $16.0 00000 G7347/6 3os Benelli, 3os M Ward
40.60 x 1.50 1./x 1.7/0.7  C  N  cont..   71.0860.7 4651b 1os Minarelli V1L lower
40.60 x 1.50 1./x 1.7/0.7  C   I  $12.0 0000 26.1046/6 1os Morini MO1, MO2, MO4, M1
40.60 x 2.00 1./x 1.7/0.7  C  N  $10.0 0 0  308.029.00 3os Garelli
40.60 x 2.0/1.0 x 1.65/.6  L  N  $15.071.0860.7 4651a 1os Minarelli V1L upper
40.75 x 1.5/1.3 x 1.80 /7  T  N   N/A    13041.147.005a 3os Honda NC50, PA50 upper
40.75 x 1.50 1./x 1.7/0.7  C  N   N/A    13041.147.005b 3os Honda NC50, PA50 lower
40.80 x 1.50 1./x 1.7/0.7  C   I   $12.0 000   26.1046/8 2os Morini MO1, MO2, MO4, M1
40.80 x 1.50 1./x 1.7/0.7  C  N  $9.0 71.0860.7 4661b 2os Minarelli V1L lower
40.80 x 2.0/1.0 x 1.65/.6  L  N   N/A   71.0860.7 4661a 2os Minarelli V1L upper
40.80 x 2.00 1./x 1.7/0.7  C  N  $10.0  00  308.030.00 4os Garelli 

41.00 x 1.2/1.0 x 1.90 /7  T   I   $14   
13010.GJ5.015a Honda TG50, NN50 Gyro upper
41.00 x 1.2/1.0 x 1.90 /7  C   I   N/A    13010.GJ5.015b Honda TG50, NN50 Gyro lower
41.00 x 1.5/1.3 x 1.80 /7  T   I   $14.0 0  12140-16B10 Suzuki FY50, FZ50, FA50 upper
41.00 x 1.50 1./x 1.7/0.7  C  N  $10.0 0000000  00000 Minarelli V1 Industriale 53cc stroke 42

41.40 x 1.50 1./x 1.7/0.7  C   I   $12.0 0000000  00000 Unknown only one
42.00 x 1.50 1./x 1.7/0.7  C  N   N/A    0 00000  00000 Minarelli V1 Carrabela 58cc stroke 42
42.00 x 2.00 1./x 1.7/0.7  C  N   N/A  0000000  00000 Puch DS60
42.00 x 1.50 1./x 1.7/0.7  C flat
$40/set    E660-00-50 Indian 4-stroke ring set comp(2) oil(1)
42.25 x 1.50 1./x 1.7/0.7  C flat
$40/set    E660-10-50 1os Indian 4-stroke set comp(2) oil(1)
42.50 x 1.50 1./x 1.7/0.7  C flat  N/A     
     E660-20-50 2os Indian 4-stroke set comp(2) oil(1)
42.75 x 1.50 1./x 1.7/0.7  C  N  $12.0 0000000  00000 big bore kit appr 60cc only two
43.00 x 1.50 1./x 1.7/0.7  C  N  $12.0 0000000  4635HP big bore kit appr 60cc only 3
43.00 x 2.0/1.0 x 1.65/.6  L   N  $16.0 0000000  00000 big bore kit appr 60cc only one
43.50 x 1.50 1./x 1.7/0.7  C  N  $10.0 0000000  00000 big bore kit appr 60cc

44.00 x 1.50 1./x 1.7/0.7  C  N  $10.0 0000000  G-591 Benelli Dynamo 65 59cc stroke 39
44.00 x 1.50 1./x 1.7/0.7  C  N 
cont..  00000    MF-554 big bore kit Peugeot 103 59cc
44.00 x 1.50 1./x 1.7/0.7  C   I    N/A    00000 22350-67 Aermacchi Harley Davidson M65 1967-72 64cc stroke 42
44.20 x 1.50 1./x 1.7/0.7  C   I    N/A    00000 22351-67 1os Aermacchi Harley Davidson M65 1967-72 64.5
44.40 x 1.50 1./x 1.7/0.7  C   I    N/A    00000 22352-67 2os Aermacchi Harley Davidson M65 1967-72 65cc

45.00 x 1.50 1./x 1.7/0.7  C  N   N/A    0 0000. 71.8187 Minarelli P4-70, P6-70 67cc
45.20 x 1.50 1./x 1.7/0.7  C  N   N/A    0 0000. 71.8187 1os Minarelli P4-70, P6-70 67cc
45.40 x 1.50 1./x 1.7/0.7  C  N   N/A    0 0000. 71.8187 2os Minarelli P4-70, P6-70 67cc  

 

 


Ring Information

 

Pinned or Not Pinned: Most moped piston rings are two-stroke style, where there are pins in the ring grooves of the piston that keep the rings from rotating around. Two stroke cylinders have holes or ports that the ring ends can snag on. So two stroke rings are pinned to the piston. Four stroke cylinders do not have any holes, so four stroke rings are not pinned. Knowing about those pins is important when installing.    

Getting the right rings: If your model is not in the applications, then you must measure the bore and the ring thickness. A calipers is the best tool to measure the bore (ring diameter) and ring thickness. Sometimes your rings might not be original, for many reasons. The piston might be aftermarket with thinner rings. The cylinder might be bored out to an oversize bore. Some mopeds came with more than one piston size or ring style.

Break a ring, how not to: Two stroke pistons have little pins (stumps, bumps) in the piston ring grooves that prevent the rings from rotating. Knowing where each ring locating pin is, and aligning the ring gap over the pin during cylinder installation, is the key to not breaking the ring. 

Measuring wear: A new piston ring is a the best tool to measure how worn a cylinder is. Conversely, a new cylinder is the best tool to measure how worn a ring is. To measure the wear of a ring, you need a perfectly round cylinder of a precisely known bore. A worn cylinder that has not been honed will still have it’s original new bore at the very top, above where the rings rub at. A new ring in a new cylinder should have a very small end gap of .004 to .008″. A worn but still OK cylinder with a new ring will have a gap of .0010 to .018″. A worn cylinder and ring both will have an end gap of over .020″(.5mm). A badly worn cylinder and/or ring will have a huge gap, over .030″(.75mm). You measure ring gap with a feeler gauge.

Classifying Jawa Rings

Classifying Piston Rings

Classifying rings: Rings get mixed up and are difficult to tell the size, unless a perfectly round cylinder of an appropriate size is available to place the ring in. If you try to squeeze a piston ring into a circle with just fingers, it inevitably becomes a very rounded polygon, or at best an ellipse. So the measurement becomes inaccurate. At right is how Myrons Mopeds’s Jawa piston rings were classified, using a piece of aluminum tubing with a tight fitting piston inside it to hold the tube round, and the test ring square. From top to bottom, 39.03 x 2.0, 39.28 x 2.0, 39.53 x 2.0, 39.78 x 2.0mm. Each ring increases in diameter by 0.25mm, so the circumference increases by Pi times that, or about 0.8mm. Here the inside of an old fishing pole tube is 39.78mm, perfect for the 3rd oversize 39.78 ring, on the bottom, with a gap of almost zero. Each gap is 0.8mm more because each ring is 0.25mm less diameter. It is important that the piston and ring fit the cylinder properly.   

Filing down: To make a ring slightly smaller, one of the two ring ends can be filed down, while preserving the shape. To reduce the size (diameter) by 0.20 mm, the end must be filed down by pi times that, 0.63 mm. When a filed down ring is installed in a cylinder smaller than it was designed for, two things change. The tension is greater, and the shape is slightly non-circular. So filed rings need a longer break-in period, to wear down the higher places. With 38 to 41 mm rings, the size can be reduced by 0.2mm with about 30 minutes of break-in, and by 0.5mm with about 2 hours of break-in. After break-in the rings have a mirror polish all around.

Why is the width not specified? Because the inner side of the ring does not touch anything. The ring has spring tension pushing it outwards, keeping the bottom (inner) surface from touching the bottom of the ring groove. So the ring width can be any amount, from about half the groove depth, to the groove depth. The exact ring width is not important. Exact ring height and diameter are important. 

 

 


Sachs Engines

February 27, 2021

1955 Sachs poster

1. Sachs Engines

Welcome. “Fichtel & Sachs” was founded in 1895 by Ernst Sachs and Karl Fichtel, in Schweinfurt Germany. Ernst Sachs was a racing cyclist and technical wiz, while Karl Fichtel was a business manager. They made hubs and spindles for bicycles and lorries. Ernst Sachs designed and patented a new bicycle hub, the “coaster brake” in 1894, which sold successfully, and also invented the “free-wheel” in 1903. Fichtel died in 1911, and Sachs, in 1932. The first Sachs engine did not come out until 1930.

Sachs introduced their first Saxonette moped in 1937, a 60cc two-stroke 1.2 hp “motor wheel” where the rear wheel and motor were a unit. 320,000 were made in 1937, and 500,000 in 1938. Read more at https://en.wikipedia.org/wiki/Sachs_Motorcycles

 

 

Sachs 301/A

Sachs 502/3

Sachs 501/2

Sachs 504/1

 

 

 

 

 

 

Sachs 504/1

Sachs 505/1 and 505/2

 

 

 

 

 

 

 

 

 

 

 

Sachs engines have the following numbering scheme:  SSX/YZ(W)

  • SS is the engine size 30, 50, 80, 100, 150, 175 (50 for US models)
  • X is the bottom end designation 1, 2, 3, 4, 5, 6 (4, 5 or 8 for US models).
  • Y is the number of speeds 1, 2, 3, 4, 5, 6 or A ( 1 or A for US models)
  • Z is the cylinder designation, and represents the speed restrictions applied, and may be A, B, C or D
  • W is an additional designation sometimes included on later models and import models to identify other peculiarities. A “K” for example indicates the kickstart version.

Examples:

  • 301/A   is 30 cc size, type “1” bottom end (rear bicycle wheel), “A” automatic transmission
  • 501/4A is 50 cc size, type “1” bottom end (1960’s   kick-start), “4” speed manual trans.
  • 502/2A is 50 cc size, type “2” bottom end (1960’s with pedals) “2” speed manual trans.
  • 504/1A is 50 cc size, type “4” bottom end (1970’s   no pedals), “1” speed, “A” speed version
  • 505/1D is 50 cc size, type “5” bottom end (1970’s with pedals), “1” speed, “D” speed version
  • 508/A   is 50 cc size, type “8” bottom end, (80’s 2sp no pedals) “A” automatic transmission
  • 1005/5A 100 cc size, type “5” bottom end (1980’s   kick-start), “5” speed, “A” speed version
  • 1255/6A 125 cc size, type “5” bottom end (1980’s   kick-start), “6” speed, “A” speed version

 

 


Benelli 4M 4MS 4M65

January 21, 2021
1969 Benelli Parts Catalog Dynamo Compact 50cc Dynamo Trail 50cc Dynamo Woodsbike 50cc

1968-69 Dynamo

Benelli models with 4M, 4MS, 4M65 engines 1965-77

49 or 59cc vertical cylinder 4-speed foot-shift, manual clutch.

1960's Benelli 50cc 4-speed foot shift, "mild" version with Dellorto SHA carb

Left 4M, right 4MS, 16 intake

1969 Benelli Dynamo Trail 50 engine

4MS engine

 

 

 

 

 

4M engine: The 4M has a mild cylinder, with shorter and narrower ports, a 12mm ID intake, and a smaller 12mm Dellorto SHA 14/12 side-draft carburetor.

The 4M engine was on the 1968-69 Benelli Dynamo Compact. M means marce, Italian for “march”, or in the motorcycle industry “foot-shift”.

4MS engine: The 4MS has a “sport” cylinder, with taller and wider ports, a 16mm ID intake, and a larger 16mm Dellorto UA16S down-draft carburetor. Horsepower 4.5 at 7800 rpm. This is the version shown in the parts illustration.

The 4MS engine was on the 1965-68 Benelli Fireball and Fireball Trail, and 1969 Dynamo Trail and Super Mini.

Benelli 4M and 4MS engine parts

4M and 4MS partial parts list:

00#  price 0 1970# 00000 description        specs
002  $0.20 ‌MU332head washer ∅6

00
3  $0.40 ‌MU280 head & ex. nut M6
009 
none   ‌G7007 cylinder stud M6 x ?
011  $12.0G7010 head gasket ∅41
013 
none   ‌G7011/2 base gasket
035  $7.50  MU2265  drive seal 28-38-7
084  $00.0 MU7865 right crank seal

087  $45.0 G7346 piston bare dome top hi-comp use #91
089  $10.0 ‌G7347 0 piston ring Std 40.0 x 1.5 GN
089  $22.0 G7347/2 piston ring 1os 40.2 x 1.5 GN
089  none   G7347/4 piston ring 2os 40.4 x 1.5 GN
089  $16.0 G7347/6 piston ring 3os 40.6 x 1.5 GN
090  $8.00 G7115 piston pin ∅12 x ?

091  $65.0G7346/C   piston assy Std 40.0 x 17-12-18 GOL
091  N/A     G7346/C2 piston assy 1os 40.2 x 17-12-18
091  N/A     G7346/C4 piston assy 2os 40.4 x 17-12-18
091  N/A     G7346/C6 piston assy 3os 40.6 x 17-12-18
100  N/A     G7342 left crank seal 15-25-5

 

 

 

1972 Benelli Dynamo 65cc Parts Manual

1969-75 Dynamo

 

 

4M65 engine: Since 1970 the 4M and 4MS 49cc engine size was increased to an advertised 65cc on the 4M65. But the actually size was 59.3cc. Bore and stroke were 44 x 39 mm. That was dishonesty in labeling, motivated by “bigger is better” thinking.

The Benelli 4M65 engine is on 1971-73 Mini Enduro, 1970-72 Cougar, 1970-71 Dynamo Compact, Dynamo Trail (Scrambler), Woodsbike, 1972-73 Compact II, Dynamo II, Woods II, 1974-75 Dynamo Trail, 1976-77 Dynamo. It has large square head, larger piston, Dellorto ME15BS carburetor. 

 

1969-75+ Benelli 65cc 4-speed engine

Benelli 4M65 engine

 

 

 


Benelli 3V 3VK 3VK-1978

January 21, 2021

Benelli models with 3V, 3VK, 3VK-1978 engines

49cc vertical cylinder 3-speed grip-shift, manual clutch.

1959 Benelli 3V with 3V engine

’72 Benelli 3VK with 3VK engine

’73 Benelli Export 3VK

 

 

 

 

 

 

 

 

 

 

Benelli 3VK engine parts

3V and 3VK partial parts list:

00#  price 0 1980# 0000 1970# 00000 description        specs
004  $0.40 ‌92.60.22.06 MU280 head & ex. nut M6
00
5  $0.2095.00.02.06 MU332 head washer ∅6
00$4.00 ‌96.50.61.05 G7483 cylinder stud M6 x 105 (107 total)
00N/A     ‌70.02.24.00 G7825 head

008  $7.00 ‌48.02.20.70 G7010 head gasket ∅41
00N/A     ‌00.00.00.00 G7006/A cylinder (different from FA)
0
11  N/A     ‌00.00.00.00 G310 intake pipe ∅18 at clamp (different from FA)
062  N/A     00.00.00.00 G7011 base gasket

095  $47.0.0 70.06.04.00 G7346 piston bare dome top hi-comp use #183
096  $10.0 48.06.12.70 G7018 piston pin ∅12 x ?
097  $1.50 90.27.20.12 L339 piston pin clip ∅12

098  $10.0 ‌48.06.08.70 G7347 0 piston ring Std 40.0 x 1.5 GN
098  $22.0 48.06.08.72 G7347/2 piston ring 1os 40.2 x 1.5 GN
098  none   48.06.08.74 G7347/4 piston ring 2os 40.4 x 1.5 GN
098  $16.0 48.06.08.76 G7347/6 piston ring 3os 40.6 x 1.5 GN
106  N/A     
70.71.24.00 G7094/4 magneto assy Dansi MSL105
106  N/A     00.00.00.00 G7094/2 magneto assy CEV 6097
106  N/A     70.71.16.20 G00000  magneto assy Dansi 100844  on 3VK NT (Export FA)
133  $19.0 00.00.00.00 M56/2  points for MSL105 01.3240
photo
135  $15.0 00.00.00.00 M26/2  condenser for MSL105 M17D photo
150 
$75.0 70.11.26.00 G29  carburetor Dellorto SHA 14/12L genuine, modern (not all metal)  
150  $00.0 00.00.00.00 G29  with correct #58 jet, 18 clamp sleeve, air cover, screen and clip
157  $5.00 35.93.57.00 DE1486/58main jet 58

133  $00.0 00.00.00.00 G7094/2Dpoints for CEV 6097

183  $65.0 70.06.02.20 G7346/C   piston assy Std 40.0 x 17-12-18 GOL
183  N/A     70.06.02.22 G7346/C2 piston assy 1os 40.2 x 17-12-18
183  N/A     70.06.02.24 G7346/C4 piston assy 2os 40.4 x 17-12-18
183  N/A     70.06.02.26 G7346/C6 piston assy 3os 40.6 x 17-12-18

 

 

 

’76 Benelli Magnum 3V   ’78 Benelli Magnum 3V
3VK engine 00000000 3VK-1978 engine

’78 Benelli Magnum 3V
3VK-1978 engine

1978 Benelli Export
3VK-1978 engine

 

 

 

 

 

 

 

 

 

 

 


Benelli GM GK GK65

January 21, 2021

Benelli models with GM, GK engines 1965-73

1967 Gentlemen moped

49cc horizontal cylinder 1-speed, automatic clutch

1965 Gentlemen moped
GM engine, 2.25-16 tires

 

Benelli GM engine 49cc (40 x 39mm)

 

 

 

 

 

 

GM engine (Gentlemen Monomarcia 49cc) is on the 1965-69 Benelli Gentlemen (Italy model), father of the Benelli G2. It is also on the 1969 Benelli Maverick (US model), a front-gas-tank version of the Gentlemen. Notice the 1967 spelling of Gentlemen, not Gentleman. The Gentlemen spelling appears in several late 60’s official publications. 1970 official brochures said Gentleman. See Benelli’s with G2, G2K engines. Here we will use Gentlemen for 1960’s and Gentleman for 1970’s. 

’70’s Benelli Gentleman (in NZ) with GK engine

The GM engine has a Dansi MDP44 magneto and front-facing Dellorto SHA 14/9 carburetor. It does not have internal pedals. Instead both motor and pedal chains are on the left side, very unusual.

The Gentleman with pedals had a Domino left control with a start lever, instead of a left twist grip start control like the 1965-69 Wards Riverside had. It is visible in the photo. So it’s in bicycle mode all the time, until you pull the start lever.

GK (Gentlemen Kickstart 49cc) engines are on US-model mini-cycles. The kick models do not have pedals or a pedal chain.  The GK and GK-65 engines have a two-piece transmission cover, different than a GM one-piece. They do not have pedals or a pedal chain.

USA mini-cycles with GK and GK65 engines have Dansi ADP244S magnetos and front-facing carburetors, Dellorto SHA 14/12.

 

Benelli GM parts

GM partial parts list:

00#  price 0 1980# 0000 1970# 00000 description        specs
001 $10.0
70.09.30.10 G244/20 start cable for lever control 1L 52 x 57″
001 $00.0 ‌ 70.09.30.10 G244/20 146, 147, 148, 149, 150 not included
050  N/A     00.00.00.00 N14 magneto assembly Dansi MDP44 82/110 x 94

059  $4.0096.50.61.05 G7483 cylinder stud M6 x 105
060  $0.2095.00.02.06 MU332 head washer ∅6

061  $0.40 ‌92.60.22.06 MU280 head & ex. nut M6

076  $45.0 70.06.04.00 G7346 piston bare dome top hi-comp use #165
077  $0.00 48.06.12.70 G7018 piston pin ∅12 x ?
079  $10.0 ‌48.06.08.70 G7347 0 piston ring Std 40.0 x 1.5 GN
079  $22.0 48.06.08.72 G7347/2 piston ring 1os 40.2 x 1.5 GN
079  none   48.06.08.74 G7347/4 piston ring 2os 40.4 x 1.5 GN
079  $16.0 48.06.08.76 G7347/6 piston ring 3os 40.6 x 1.5 GN
080  $9.0000.00.00.00 N23 base gasket

084  $12.0 ‌48.02.20.70 G7010 head gasket ∅41

088  $2.00 00.00.00.00 UI7496 exhaust stud M6 x 26
090  $65.070.06.02.20 G7346/C   piston assy Std 40.0 x 17-12-18 GOL
090  N/A     70.06.02.22 G7346/C2 piston assy 1os 40.2 x 17-12-18
090  N/A     70.06.02.24 G7346/C4 piston assy 2os 40.4 x 17-12-18
090  N/A     70.06.02.26 G7346/C6 piston assy 3os 40.6 x 17-12-18
092  $6.00 00.00.00.00 G7096 spark plug cap plastic
093  N/A     00.00.00.00 SD462/3 stator plate ∅94 for 01.3239 points
094  N/A     48.70.95.70 G221/11 lubricating felt
095  N/A     35.70.79.00 G221/3 points and cond. screw
096  $15.0 48.70.86.70 G26/2 = G221/6 condenser M17T 07.0074 0.28 μf, ∅18 x 21 photo
097  N/A     00.00.00.00 N14B internal spark coil
098  $21.0 00.00.00.00 SD462/2 points 01.3239 photo
099 
$0.40 70.71.89.20 G221/8 thin lock washer ∅4 x 7 x 0.5
100  $1.20 35.71.57.50 G221/7 coil screw M4 x 25 slot
101  N/A     00.00.00.00 N14/C lights coil
102  N/A     00.00.00.00 N14/A flywheel Dansi MDP44 82 id x 110 od
146 $0.50  48.80.18.70 UI7191  start cable cap subst.  for 1L F5C 
photo
147 $4.00  48.80.25.70 G10       start cable spring subst. 6.5-7.0 id x 60-75
148 $3.00  48.80.24.70 M277     start cable pinch bolt for 1L P20 photo
149 $3.00  70.62.69.20 G000     start lever adjuster   for 1L A3a photo
150 $4.00  00.00.00.00 G000     Domino start lever anchor pin D14a

 

 

Benelli models with GK65 engines 1969-73

59cc horizontal cylinder 1-speed, automatic clutch

Benelli GK65 engine 59cc (44 x 39)

’70-72 Benelli Buzzer

’69-71 Benelli Hornet

 

 

 

 

 

 

 

 

GK65 engine: (Gentlemen Kickstart 59cc) engines are on 1970-73 US-model mini-cycles. The model names say “65” but the actual size was 59cc, not 65cc. The bore and stroke are 44 and 39 mm, so (44/2)*(44/2)*3.14*39/1000 = 59.27 cc. The GK and GK-65 engines have a two-piece transmission cover, different than a GM one-piece. They do not have pedals or a pedal chain.

These have Dansi ADP244S magnetos and front-facing carburetors, Dellorto ME15BS? 

 

 

Benelli GK65 engine parts

GK65 partial parts list

00#   price   1970#    description      specs
071  none   G244/26  start cable
o1A  none   G244/27  start cable
07none   G10  start spring
07$3.00 N277  start pinch bolt P20 photo

050  $0.40 MU280  head & ex nut M6
072  none   N134  magneto complete  Dansi ADP244S 
photo
B82 
none   G421 
piston bare ∅44 use #165
083  $8.00 G424 piston pin ∅12 x ?
084  $1.00 MU339 piston clip ∅12
085  $10.0 G591    piston ring Std 44.0 x 1.5 GN
085  none  G591/2 piston ring 1os 44.2 x 1.5 GN
085  none  G591/4 piston ring 2os 44.4 x 1.5 GN
085  none  G591/6 piston ring 3os 44.6 x 1.5 GN

108  none  G422 head gasket ∅45

110  $4.00 G7483 cylinder stud M6 x 105
111  $0.20 MU332 washer M6
112  none  N316 base gasket

117  $2.00 UI7496 exhaust stud M6 x 26
152  none   N134/A  flywheel ∅82 ∅110 aluminum Dansi ADP244S
153  none   G314/A  lighting source coil
154  none   G221/2  ignition source coil (with external ground wire that powers brake light)
155  $1.20 G221/7  coil screw M4 x 25 slot
156  $0.40 G221/8  thin lock washer  ∅4 x 7 x 0.5
157  none   SD401  screw set
158  $21.0 CS0004  points #01.3239  photo  (gap 0.015″)

159  $15.0 G221/6  condenser #07.0074  0.28 μf, ∅18 x 21 photo
160  $1.50 G221/3  points screw M4 x 8 small slot
161  none   SD426/3  stator plate bare ∅94  2+3 hole

165  none  G421/C   piston assy Std 44.0 x 17-12-18
165  none  G421/2C piston assy 1os 44.2 x 17-12-18
165  none  G421/4C piston assy 2os 44.4 x 17-12-18
165  none  G421/6C piston assy 3os 44.6 x 17-12-18

 

 

 


Benelli FA

January 21, 2021

Benelli models with FA engines 1960?-75

1960's Benelli moped engine

’60’s Benelli FA engine

49cc vertical cylinder 1-speed automatic clutch.

 

FA engine (Frizone Automatico) engine had an upright slanted forward cylinder, not horizontal like the GM or G2 motor. It was rounded everywhere, not mostly square like the 1970’s motors. The pedals were part of the motor unit, not separate like on the G2.

The 1965-69 Wards Riverside 150D and 250D mopeds, the 1974-75 Benelli 3FA moped. and 1976 Benelli Export FA had FA engines. The left grip was a twist grip that operated the starting clutch. Normally the bike is in pedal mode. Twist the left grip back to engage the motor for starting. Once started it is under automatic clutch control, engaged above 10mph and in neutral below about 5mph. The hand levers are hand brakes, left rear and right front. The controls are early Domino. Throttle is a wrap-around type.

 

 

Wards Riverside cylinder and piston

Wards Riverside cylinder and piston

17x12x18 Benelli

The Benelli FA and M4 cylinders are the same as the Benelli M4S cylinder on the 50cc Fireball, except the porting. The Fireball cylinder has a 17mm (for the Dellorto UA16 carb) intake port at the flange, while the FA (and M4?) have a 10mm intake port hole (for a Dellorto 14/12 carb). The exhaust port is taller and wider on the Fireball. The transfer ports and intake port are also wider and maybe taller.

The 1960’s Benelli FA, M4 and M4S piston is the same as the 1970’s Benelli G and G2 piston. They are all 40.0mm bore, 39 stroke, and use the same rings 40 x 1.5 FG. The exhaust has a screw-on mount, with M34-1.5 male thread on the exhaust, female on the cylinder.

 


Wards Riverside owners and assembly manual,
select photos showing original parts.

1965-67 Wards Riverside (Benelli FA engine)

Mopeds with manual starting clutches usually have an extra hand lever below the left handlebar, for starting. Instead of a start lever, Benelli has a start grip. You pedal the bike, then twist the left grip, to engage the engine. Then let go once the engine has started.

Date: The date of manufacture is not stated on the ID plate or anywhere else on the frame. On 250D models with original speedometers, there may be a date stamped in ink, on the bottom of the speedometer shell. Remove the speedometer to see it.

Here is a link to the 1965 Wards Riverside Service Manual

 

1965 Wards 250-D

 

Wards Product Codes 

FFA-61-14001A  1965-66 Riverside 250-D 1.5hp red/wht long seat 2.25-18
FFA-61-14001B  1966-67 Riverside 250-D 1.5hp red/wht long seat 2.25-18
FFA-61-14018B  1966-67 Riverside 150-D 1.5hp red/wht solo seat 2.25-18

 

1965 Wards Riverside 150-D

1966 Wards Riverside 150-D

Wards Riverside

1965 Wards Riverside 250-D

 

 

 

 

 

 

 

 

 

 

 


This is an entire 1965-67 Montgomery Ward Riverside moped parts manual, condensed, colorized with prices, availability and specifications added. It is combined with a 1976 Benelli Export FA engine parts illustration and parts list. In ten years not much changed except the starting clutch and maybe something else.

On parts that have different sizes, the 1976 part numbers say the size in millimeters, here colored in orange.

 

 

Benelli 1976 FA engine parts (Export FA)

FA ’76 list

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Benelli 1966 FA engine parts (Wards Riverside 150-D and 250-D)

FA ’66 list

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FA engine complete parts list:

66# 76#  price  0 ’76 part#    ’66 part#    description   specs
001 000  $0.00  00.00.00.00  MU1476  coil bolt M6 x ??
002 073  $0.20  95.00.02.06  MU332  washer M6
003 074  $0.40  92.60.22.06  MU280  nut M6-1.00
004 000  none.  00.00.00.00  I9161  ignition coil ’66 round can type
000 C72  $78.0 71.71.65.10  G000   ignition coil ’76 H79 E type Dansi photo
000 C72  $43.0 71.71.65.10  G000   same but good-used, both sold “as is”
005 000  $3.00  00.00.00.00  I9161/1  ground wire
006 119  $4.00  96.50.61.05  G7483  cylinder stud M6 x 105
007 047  $3.00  35.71.70.00  B1348/2  spark plug NGK B6ES now BR6ES
008 C86  $6.00  45.71.74.00  G6076  spark plug cap modern plastic 
009 C73  $2.00 823.91.00.70 G25  spark plug wire 12″
010 043  none.  70.11.50.10  G7350  intake pipe ∅18 od
011 046  $0.00  70.11.55.00  G7015  intake gasket
012 045  $0.25  95.02.11.06  MU432  lock washer M6

013 000  $2.00  00.00.00.00  G7496  intake stud M6 x 30
000 044  $0.70  98.62.23.20  00000  intake bolt M6 x 20 allen 

014 00none.  48.09.39.70  G7947  starter lever-shaft ∅11
015 00$14.0  48.08.76.70  G7948  internal start lever
016 00$2.00  90.27.10.11  G7949  start shaft retaining ring external ∅11 x 1
017 00$0.00  90.70.61.07  G4  start shaft seal ring 10 id ?
018 019  none.  48.08.19.70  G7944/1  adjustment screw
019 017  none.  48.08.20.70  G7944/2  clutch shoe
020 018  none.  48.08.35.70  G7944/3  clutch shoe spring
021 00none.  48.08.55.70  G7946  clutch push rod
022 000  none.  00.00.00.00  G7945  thrust cap
023 015  $1.50  90.27.10.15  MU3813  retaining ring external ∅15
024 020  $1.50  90.27.10.10  MU8153  shoe retaining ring external ∅10
025 000  none.  00.00.00.00  G7944/5  washer M10
026 012  none.  48.08.26.70  G7944/6  starter clutch plate
027 016  $0.00  48.08.16.70  G5  washer 16 id?
000 011  $6.00  48.02.32.70  G418  retaining ring ∅95 x 2.0
028 021  none.  69.08.46.00  G7944/7  clutch drum with gear 
029 048  none.  70.02.24.00  G7825  cylinder head
030 049  $12.0  48.02.20.70  G7010  head gasket
031 050  none.  70.02.03.10  G7438  cylinder
032 051  $0.00  70.02.08.00  G7011/1  base gasket
033 033  $5.00  90.27.20.42  MU7062  retaining ring internal ∅42 x 1.7
034 034  $10.0  90.20.10.20  MU7056  right drive shaft bearing 6302 15-42-13
035 035  none.  70.21.36.10  G7987  secondary gear shaft
036 029  $0.00  91.60.03.37  MU3817  clutch woodruff key
037 037  none.  70.21.45.10  G7774  secondary shaft gear
038 038  $10.0  90.20.11.20  MU3061  left drive shaft bearing 6302Z 15-42-13 
039 039  $7.50  90.40.28.38  MU2265  drive seal 28-38-7
040 040  none.  70.33.05.10  G7340  drive sprocket
041 041  $0.00  70.21.93.00  G73440  sprocket nut
042 025  $0.00  48.21.93.70  L837  gear shaft nut
043 026  none.  70.21.58.10  G9  large primary gear
044 034  $10.0  92.20.10.20  MU7038  right gear shaft bearing 6003 17-35-10
045 035  none.  70.21.36.10  G7988 gear shaft
046 037  none.  70.21.45.10  G7039  small primary gear
047 038  $7.00  92.20.11.20  L746  left gear shaft bearing 6201  12-32-10
048 032  none.  70.01.42.10  G7777  left case plug
049 060  $1.20  98.62.03.45  M79  clutch cover screw M6 x 45 allen black
050 059  $0.80  98.62.03.25  MU1414/1  mag. cover screw M6 x 25 allen black
051 061  none.  70.00.16.10  G1  clutch cover
052 064  none.  70.00.49.10  G7092/1  dip stick
053 063  $0.00  70.08.38.10  G8  bushing with lip
054 070  $0.00  35.00.20.00  UI7080  dowel tube ∅6 ∅8? x 20?
055 059  $0.80  98.62.03.25  MU1224 case screw M6 x 25 allen black
056 067  none.  48.00.46.71  L492  breather
057 068  $0.00  90.71.40.80  L493  seal washer
058 069  none.  70.00.10.00  G7861  right case half
059 077  none.  90.40.19.27  MU7778  right crank seal 19-27-6   
060 078  $0.00  90.20.14.16  G7365  L & R crank bearing 6004 C3   20- 42-12
061 082  none.  70.06.44.10  G7943  right crank half
062 052  $10.0  48.06.08.70  G7347  piston ring 40.0 x 1.5 GN
062 000  $22.0  48.06.08.72  G7347/2   piston ring 1os 40.2 x 1.5 GN
062 000  none    48.06.08.74  G7347/4   piston ring 2os 40.4 x 1.5 GN
062 000  $16.0  48.06.08.76  G7347/6   piston ring 3os 40.6 x 1.5 GN

063 053  $47.0  70.06.04.00  G7346  piston bare (substitute)
064 056  $1.50  90.27.20.12  L339  piston clip ∅12
065 000  none.  00.00.00.00  G7116  connecting rod bare, for bushing
000 057  none.  48.06.16.70  G0000  connecting rod bare, for bearing
066 000  $0.00  00.00.00.00  G7019  piston pin bushing ∅12 ∅14?
066 054  $0.00  95.25.20.12  00000  piston pin bearing ∅12 ∅15?
067 055  $10.0  48.06.12.70  G7018  piston pin ∅12
068 000  none.  00.00.00.00  MU7112  rod bearing rollers
069 000  none.  00.00.00.00  G7111  rod bearing cage
000 058  none.  92.25.20.12  00000  rod bearing assembled
070 083  none.  70.06.50.00  G7115  crank pin
071 084  none.  70.06.43.00  G7119  left crank half
072 081  $2.00 ‌ 91.60.02.38  G7274  flywheel woodruff key M81 2.0 x 3.7
073 085  none.  90.40.15.25  G7342  left crank seal 15-25-5
074 088  $0.00  91.55.10.70  UI281  grommet
075 087  none.  70.00.07.10  G7862/2  left case half
076 000  $0.70  00.00.00.00  MU7084  lock washer M4 toothed
077 089  $1.30  98.20.04.10  MU1147  stator plate screw M4 x 10 slot
 Dansi magnetos: all ∅82 id rotors, ∅94 od stators xx  IIN means Internal spark, Int. ground, No brake light
66# 76#  price  0 ’76 part#    ’66 part#  xxxxxx  wires xxx EEB means External spark, Ext. ground, Brake light
078 000  none.  00.00.00.00  G221   magneto ign lts gnd ASL205NS ∅110 ⇐ EEB ’65-67 Wards Riverside
078 000  none.  00.00.00.00  G7094 magneto ign lts xxx
MSL105 xx ∅110 ⇐ IIN ’65-73? Export FA
000 090  none.  70.71.24.00  G000   magneto ign lts xxx
 100844   xx ∅103 ⇐ EIN ’73-80? Export FA
079 091  $1.80  95.10.12.75  UI7091  flywheel washer ∅9 ∅17 inner teeth
080 092  $0.00  92.75.00.73  I9020  flywheel nut M8-1.0 x ?
081 093  none.  70.00.02.10  G7767  magneto cover
082 000  none.  00.00.00.00  M93  MW name plate
083 000  none.  00.00.00.00  B1219  name plate rivet
084 098  none.  70.12.08.00  G7840  exhaust header pipe
085 096  $0.00  70.12.03.00  G7009  exhaust seal ring ∅30? od
086 097  none.  70.12.02.00  G7763  exhaust nut M34-1.50
087 099  none    70.12.69.00  G7841/1  muffler clamp
088 100  none.  70.12.30.00  G7841  muffler
089 000  $2.00  00.00.00.00  MU614C  muffler bolt w/nut M8 x 15
090 000  none.  00.00.00.00  G7918/2  baffle
091 000  none.  00.00.00.00  G7918/2  baffle screw
092 106  $2.00  91.77.00.92  G7085  pedal pin ∅9.0
093 000  $18.0  00.00.00.00  G7087/C  pedal set replacement photo
094 000  $35.0  00.00.00.00  G7923/C  pedal crank set 502 replacement
094 105  $18.0  70.26.15.10  G0000  right pedal crank 502R rep. (needs high offset)
094 117  $20.0  70.26.15.11  G0000  left pedal crank 502L replacement
095 000  none.  96.50.60.80  G105    case stud M6 x 80 use bolt
000 071  $1.20  98.62.03.70  G0000  case bolt M6 x 70 allen
096 000  none.  96.50.60.65  G7013  case stud M6 x 65 use bolt
000 072  $1.20  98.62.03.55  G0000  case bolt M6 x 55 allen
097 070  none.  35.00.20.00  G7356  spacer ∅6 x 20?
098 000  none.  00.00.00.00  MU7075  bushing circlip ∅20? external
000 108  $1.50  90.27.11.16  00000  pedal shaft circlip ∅16 external
099 000  none.  00.00.00.00  G7110 kick-starter right bushing with clip groove
100 107  none.  90.40.16.25  MU3796  pedal shaft seal 16-25-5
101 110  none.  70.26.67.00  G7055  pedal shaft inner spacer ∅17
102 109  $0.00  70.26.74.00  G7354  pedal shaft washer
103 112  none.  70.26.66.10  G368  pedal shaft gear
104 113  none.  70.26.65.10  G7358  engage dog
105 114  none.  70.26.52.00  G7072  engage dog spring
106 115  none.  70.26.53.11  G7348  pedal shaft
107 036  $0.00  70.01.76.00  G7138  case stud M6 x ??
108 000  none.  00.00.00.00  G7370  pedal shaft bushing
109 079  $0.00  90.71.40.62  L417  drain plug seal washer 
110 080  $0.00  98.05.43.10  MU234  drain plug
111 000  none.  00.00.00.00  G221/2  ignition source coil (with external ground wire for brake light)
111 000  none.  00.00.00.00  G0000   internal spark coil for MSL105
000 157  none.  70.71.51.20 G0000  ignition source coil for 100844
112 156  $15.0  48.70.86.70  G221/6  condenser #07.0074  0.28 μf, ∅18 x 21 photo
113 164  $1.50  35.70.79.00  G221/3  points screw M4 x 8 small slot
114 000  none.  00.00.00.00  G221/1  stator plate bare ∅94  2+3 hole
000 155  none.  70.70.22.20  G0000  stator plate bare ∅94  2+3 hole for 100844

115 000  none.  00.00.00.00  G221/4  points #01.3236 photo  (gap 0.015″)
000 159  none.  70.70.88.20 $16.0  points #M14 for 100844

116 000  none.  00.00.00.00  G221/10  flywheel ∅82 ∅110  Dansi ASL205NS photo 
000 162  none.  70.71.16.20  GG0000  flywheel ∅82 ∅103  Dansi   100844  
photo
117 000  none.  00.00.00.00  G221/9  lighting coil 6V 28W = 21W head + 5W tail + 2W speedo
000 158  none.  70.71.50.20 G0000  lighting coil for 100844

118 163  $0.40  70.71.89.20  G221/8  thin lock washer  ∅4 x 7 x 0.5
119 000  $1.20  35.71.57.50  G221/7  coil screw M4 x 25 slot
000 161  $0.00  35.71.55.00  00000  coil screw M4 x ?? slot

120 164  none.  48.71.57.70  G221/5  screw set
121 160  none.  48.70.95.70  G221/11  lubricating wick (felt)
122 100  $65.0  70.06.02.20  G7346/C  piston complete modern 40.0 x 17-12-18 GOL made in Italy
122 100  none.  70.06.02.22  G7346/C2  piston complete  1st  o.s 40.2 x 17-12-18
122 100  none.  70.06.02.24  G7346/C4  piston complete 2nd o.s 40.4 x 17-12-18
122 100  none.  70.06.02.26  G7346/C6  piston complete 3rd o.s 40.6 x 17-12-18

123 000  none.  00.00.00.00  G7116/C  connecting rod assy for bushing
000 154  none.  70.06.40.10  G00000  connecting rod assy for bearing
124 042  $75.0  70.11.26.00  G29  carburetor Dellorto SHA 14/12 genuine, modern (not all metal)  
124 000  $75.0  00.00.00.00  G29  with correct #58 jet clamp sleeve, air cover, screen and clip
125 146  $5.00  49.93.87.00  DE1104/C  throttle cable adjuster w/nut A13
126 145  $2.00  43.93.28.00  DE3318  top screw M4-0.75 x 14
127 135  $16.0  43.93.50.00  DE6110/C  carb top assy good-used
128 142  $10.0  43.93.75.00  DE6108  throttle slide #1 good-used
129 136  $3.00  43.93.22.00  DE6111  top gasket
130 140  $2.00  43.93.63.00  DE3606  idle screw spring
131 141  $4.00  43.93.86.00  DE6140  idle speed screw
132 126  $2.00  46.93.86.00  DE6305  carb clamp screw M6
133 127  $2.50  43.93.76.00  DE6304  clamp screw nut M6
134 000  $0.00  00.00.00.00  DE3724  intake pipe restrictor/reducer ∅12-to-10 ?
135 134  $5.00  46.93.89.00  DE6448  clamp sleeve ∅20-to-18
136 123  $2.00  46.93.47.00  DE6123  float gasket round but goes in D-shaped groove
137 122  $5.00  43.93.44.00  DE6107  float bowl metal used
138 121  $4.00  43.93.45.00  DE3598  float bowl screw M4-0.75 x 18
139 133  $5.00  35.93.57.00  DE1486/58  main jet 58
140 125  $2.00  43.93.31.00  DE4560  float hinge pin Ø2.0 x 16.5 
141 124  $18.0  43.93.30.00  DE6122  float white hollow plastic 3.5 grams
142 132  $10.0  43.93.48.00  DE2838  float needle valve with  viton rubber tip
143 131  $5.00  00.00.00.00  DE6109  fuel filter disk
144 130  $8.00  00.00.00.00  DE6106  fuel inlet banjo, metal angled out, good-used
144 130  $7.00  00.00.00.00  DE9249  fuel inlet banjo, black plastic angled
145 129  $1.00  00.00.00.00  DE3385  seal washer 5 x 9
146 128  $5.00  00.00.00.00  DE4190  fuel inlet screw M5-0.75 x 15
147 148  $10.0  70.93.10.20  DE6183  air cover #53051a 
147 148  $17.0  00.00.00.00  DE0000  air cover set #53051 3-piece 53051 a,b,c
148 147  $9.00  43.93.25.00  DE6117  air filter metal #53051c
149 144  $3.00  00.00.00.00  DE6159  air filter gasket
150 139  $3.00  00.00.00.00  DE5417  choke pivot screw
151 138  $3.00  00.00.00.00  DE6105  choke spring
152 137  $7.00  00.00.00.00  DE6114  choke plate-lever medium
153 149  $6.00  70.93.42.20  DE6235  air cover clip #53051b
154 076  $0.60  92.60.22.08  MU187  nut M8
155 075  none.  96.50.80.98  H8256  case stud M8 x 98
156 086  none.  70.00.09.00  G7830  case gasket
157 065  none.  70.00.06.00  G7835  clutch gasket
158 024  none.  70.07.03.10  G3  clutch drum bushing
159 000  none.  00.00.00.00  G244/3  start cable for twist control 2T 52 x ?? use 1T
000 001  none.  00.00.00.00  G0000   start cable for lever control 2L 52 x ?? use 1L
159 000  $12.0  00.00.00.00  G0000   start cable for twist control 1T 52 x 57″

000 00$10.0  70.09.30.10  G244/20 start cable for lever control 1L 52 x 57″
000 C41  $3.00  70.62.69.20  G7/4 00 adjuster for 1T,1L start cable A3a see below 41
000 C35a $4.50  00.00.00.00  Gooo    cable anchor pin D14a substitute image see 35a
000 00$3.00  48.80.24.70  M277    pinch bolt for 1T,1L start cable P20 photo
000 00$0.50  48.80.18.70  UI7191 stop cap   for 1T,1L start cable F5C photo 
160 00$4.00  48.80.25.70  G10 oo  start cable spring subst. 6.5-7.0 id x 60-75
161 000  none.  00.00.00.00  G7944/C  clutch complete ’66
000 165  none.  70.08.00.10  000000   clutch complete ’76
162 000  none.  00.00.00.00  G79  crankshaft with piston pin bushing
100 152  none.  70.06.40.10  000  crankshaft with piston pin bearing
163 150  none.  70.99.90.20  G242/1  gasket set
164 151  none.  69.99.95.01  G243/1  seal set 5-piece
164 151  none.  69.99.95.01  G243/1  19-27-6, 15-25-5, 28-38-7, 16-25-5, 16-25-5
165 120  $0.00  35.11.75.40  G29/1  throttle cable 1-ended (for slide-type throttles)
166 F32  $1.00 823.94.50.80 G7187/3  fuel hose 12″ clear 3/16″id 5/16″od

C. 1976 Benelli Export FA  Controls and wheels

 

C. ’76 list

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

F. 1976 Benelli Export FA Frame parts

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R. 1966 Wards Riverside 150D frame parts, 250D #14001 add-ons are at bottom

R. ’66 list

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Minarelli G1 and others

January 19, 2021

 

Yet another 50cc Minarelli …

1979 Italjet JC5C 50cc Minarelli G1-KS engine