Contents:
00 years carb model (all kick start)
1956 part #s, round ∅44 case, round covers
1. ’63-66? ∅12 P4 (iron cylinder)
2. ’66-67? ∅19 P4S (iron cylinder)
1. ’66-70? ∅20 P4SS (iron cylinder)
3. ’65-70? ∅20 P4-55 (kits, iron cyl)
2. ’65-70? ∅20 P4-50 (racing, iron)
2. ’65-69? ∅20 P4-60 (racing, iron)
1967 part #s, round case, round covers
4. ’67-70? ∅12 P4S (iron cyl, ∅44 case)
3. ’71-72? ∅19 P4S (alum. cyl, ∅47 case)
3. ’71-72? ∅19 P4S-70 (al cyl, ∅47 case)
1970 part #s, round case, angular covers
5. ’71-73? ∅12 P4V (iron cyl, ∅44 case)
4. ’72-74 ∅19 P4V-70 (al. cyl, ∅47 case)
4. ’74-75 ∅19 P4V-75 (al. cyl, ∅47 case)
1970 part #s, angular case, angular covers
6. ’71-79? ∅12 P4E Export (iron cyl.)
5. ’72-79? ∅19 P4E-al Export (al. cyl.)
Sources:
Piccolo Giolielo – Tecnica Minarelli P4 P6 50cc by Luigi Corbetta
Motoclisimo D’Epoca 4/2003 at fantichistisettanta.forumfree.it.
Catalogo Ricambi Generale 1979 by Motori Minarelli
at passione50cc.forumfree.it.
Tecnica Motori Minarelli 50cc P4 ovalino, Monza, Cadetti, Cross
by motomorini173 at moto gran premio e 50ini.
Eclates des Moteurs collected by The Minarellist
parts for sale, free pdf manuals at Le Minarelliste.
1. 1963-66 Minarelli P4
P4 has a 4-speed, foot-shift, manual clutch, kick start.
P4S changes: The carburetor and intake changed from Dellorto SHA 14/12 to UA19S side-float type. The cylinder, piston and rings changed changed from 38.0 x 2.5 to 38.8 x 1.5. The compression ratio increased from 7.7 to 9.0. The head changed from small round fins M2-40 to bigger straight fins M24-12. The exhaust nut thread changed from M28 to M32. The nut goes over the pipe, so the pipe is smaller than that.
1. 4 ’63-66? P4 47.7cc (38.0 x 42), 2. P4 parts list
3. s ’66-67? P4S 49.6cc (38.8 x 42)
4. S ’66-70? P4SS 49.6cc (38.8 x 42)
4sS 1956# Minarelli# price 4 is P4, s is P4S, S is P4SS
110 A2-8 51.0132.7 $5.00 piston pin bushing ∅11.7 ∅15 x 13
110 A2-8 51.0132.7 none (must be reamed after installation)
111 A2-9 56.0601.0 $9.50 piston pin ∅12.00 x 31.5
222 A2-10 03.0213.0 $1.50 piston pin clip ∅12
100 A2-11 71.0405.0 $65.0 piston kit 38.0 dome top, 2.5 rings
200 A2-12 00.0000.0 $11.0 piston ring each 38.0 x 2.5 GN
111 A2-14 00.0000.0 none pinion washer
111 A2-16 49.0124.8 none key 3.0 x 3.7 use A1-25 #M85
111 A2-17 49.0312.0 $7.00 flywheel nut M10-1.25 x 14 hex15
222 A2-19 51.0203.9 $10.0 right crank bearing 15-35-11 #6202
222 A2-20 53.0506.9 $7.50 crankshaft seal 17-35-8 or 7
111 A2-21 00.0000.0 $7.00 right crank seal 15-30-8 or 7
111 A2-25 00.0000.0 none pinion key
022 A24-7 68.0115.0 $10.0 piston ring Ø38.8 x 1.5 GN
011 A24-31 71.0410.0 none piston kit 38.8 ball top
011 A24-31 71.0410.0 $60.0 piston kit 38.8 GOL 0034
110 A24-10 38.0005.0 none crankshaft, pork chop, width 32
110 A24-10 38.0017.0 none (rod end ∅14.95 x 13 for bushing)
111 A24-11 00.0000.0 none right crank half ∅13
111 A24-12 00.0000.0 none left crank half
111 A24-13 00.0000.0 none crank pin (asse) ∅16 x 31
111 A24-14 00.0000.0 none roller bearing ∅16 ∅22 x 12
110 A24-15 38.0060.7 none connecting rod with bushing
001 A24-32 38.0000.0 none crankshaft, full circle, width 32, cone 13
001 A24-32 38.0000.0 none (rod end Ø15.00 x 14 for bearing)
111 A42-1 00.0000.0 none pinion gear 13T ∅13
111 A42-2 00.0000.0 none pinion gear nut
001 A42-101 00.0000.0 none rod bare (biella)
001 A42-104 51.0301.9 $9.00 piston bearing Ø12 Ø15 x 15
444 C2-17 49.0304.9 $0.60 head nut M6 x 6
100 M2-5 19.000.0 none cylinder “C” iron 38.0 exhaust M28
111 M2-10 53.0302.0 none base gasket ∅44 40×40
444 M2-13 49.0509.0 $3.50 cylinder stud M6 x 109 (110)
100 M2-19 82.0000.0 none magneto ⇐ CEV 6067 ∅94 o♦♦ 6V early
100 M2-27 00.0000.0 none exhaust (scarico) M28 thread
100 M2-40 00.0000.0 none head 38.0 (testa) small rounded
100 M2-44 00.0000.0 none intake pipe 12 id x 18 od
100 M2-45 00.0000.0 none carb SHA14/12, F27 cover use 15.0024.9
100 M2-45 15.0024.9 $70.0 Dellorto SHA14/12 note 1
100 M2-45 31.0010.6 $12.0 air cover F27 large sloping
100 M2-45 49.0018.0 $4.00 air cover clamp with screw
011 M16-12 00.0000.0 none magneto 6V 18w internal spark
010 M24-12 77.0152.0 none head (testa) 38.8 Sport QUADRO
011 M24-13 19.0306.0 none cylinder iron 38.8 M32 ex thread
010 M24-15 00.0000.0 none intake pipe 19 id x 24 od
011 M24-21 00.0000.0 none exhaust (scarico) M32 thread
010 M24-25 00.0000.0 none carb Dellorto UA19S
001 M24-27 15.0000.0 none carb Dellorto UB20S with bell
001 M31-26 15.0000.0 none intake pipe 20 id x 23 od
001 M31-?? 77.0161.0 none head (testa) 38.8 Sport RECORD
Note 1. The genuine Dellorto SHA14/12 carburetor comes with a 52 jet, ∅18 sleeve, no air cover, no cable pipe. The F27 air cover is required for the correct air/fuel mixture. For a full parts list see Carb/Dellorto/SHA14.
3. 1965-70 P4 Kits and Racers
Transformation Kits (Serie Transformazoni) with bore ∅41:
’65?-70? P4 Transformation Mini Monza
1956# Minarelli# price 55.4 cc (41.0 x 42)
A24-50 71.0475.7 none piston 41.0 flat top L-ring
M24-27 15.0000.0 none carb Dellorto UB20S with bell (cornetto)
M24-50 19.0000.0 none cylinder iron ∅41.0 M32 thread
M24-51 77.0000.0 none head (testa) 41.0
M31-26 15.0000.0 none intake pipe 20 id x 23 od
’65?-70? P4 Transformation Monza
1956# Minarelli# price same as Mini Monza except:
M24-50 19.0000.0 none cylinder ∅41.0 exhaust 35
’65?-70? P4 Transformation Super Monza
1956# Minarelli# price same as Monza except:
M24-55 77.0000.0 none head (testa) 41.0 with bigger fins
’67 Minarelli Cadetti 60
This late 1960’s Minarelli P4 engine family was intended for racing or sport riding.
P4 Racing changes: The crank changed from A24-32 (cone ∅13 pork chop flywheel) to A42-100 (cone ∅15 full circle flywheel). The width remained at 32mm. The piston changed from A24-31 (dome top 2.5 rings) to A42-102 (flat top L2.0 and 1.5 rings). The carburetor and exhaust got bigger.
’65-70? P4 50 RG Regolarita 49.6cc (38.8 x 42)
1956# Minarelli# price same as P4S except for:
A42-102 71.0413.0 none piston 38.8 flat top L-ring
A42-102 71.0463.7 none piston 39.0 oversize
A42-100 38.0063.7 none crankshaft cone ∅15 full circle
A24-104 51.0301.9 $9.00 piston bearing Ø12 Ø15 x 15
M24-30 15.0000.0 none carb Dellorto UB20S with filter
M31-26 15.0000.0 none intake pipe 20 id x 23 od
M42-111 00.0000.0 none exhaust (scarico) ∅35 x 320
M42-102 19.0000.0 none cylinder iron ∅38.8 Special
M42-208 82.0000.0 none magneto 6V 18w int. spark
M42-208 82.0000.0 none Ducati 31.02.37
’65-71? P4 50 SP Special (Velocita) same as RG except:
1956# Minarelli# price
M42-107 00.0000.0 none exhaust (scarico) ∅35 x 300
’65-71? P4 50 CR Cross same as SP except:
1956# Minarelli# price
M24-30 15.0000.0 none carb Dellorto UB20S with filter
M42-208 82.0000.0 none magneto 6V 18w int. spark,
M42-208 82.0000.0 none Ducati 31.02.32 (no lights)
In 1965 a new 60 cc class was launched in Italy to replace the 50 class. In 1970 it returned to 50 cc.
’65-69 P4 60 CA Cadetti (Velocita)
59.2cc (41.4 x 44) piston port induction
1956# Minarelli# price
A42-203 68.0000.0 none piston 41.4 with 6.5 skirt cut
M24-27 15.0000.0 none carb Dellorto UB20S with bell (cornetto)
M42-211 00.0000.0 none exhaust (scarico) ∅35 x 295
M42-202 19.0000.0 none cylinder iron ∅41.0 Cadetti
M42-208 82.0000.0 none magneto 6V 18w int. spark,
M42-208 82.0000.0 none Ducati 31.02.37
’65-69 P4 60 CR Cross
58.1cc (41.0 x 44) piston port induction
1956# Minarelli# price
A42-205 68.0000.0 none piston 41.0 with 5.5 skirt cut
M24-30 15.0000.0 none carb Dellorto UB20S with filter
M42-111 00.0000.0 none exhaust (scarico) ∅35 x 320
M42-202 19.0000.0 none cylinder iron ∅41.0 Cadetti
M42-208 82.0000.0 none magneto 6V 18w int. spark,
M42-208 82.0000.0 none Ducati 31.02.32 (no lights)
Top: 1965 Italjet Vampiro racer with P4 60 CA Cadetti (piston port induction) engine. The intake goes to the cylinder. The caption says “The Italjet Vampiro with Minarelli 60 engine presented in Monza shortly before the 1965 Milan Show. It will sell for 180 lire including the plastic fairing. Bore and stroke dimensions 41.4 x 44mm = 59.2cc. Note the built continuous double cradle frame and the four-shoe front brake.”
Bottom: 1967 Minarelli factory racer with P4 60 (rotary induction) engine. The intake goes to the crankcase. The caption says “The “lamellar” Minarelli prepared for the 1967 season has the same bore and stroke measurements as the conventionally fueled model, but delivers 9.5 HP at 10,800 rpm against the 9.0 at 10,800 rpm of the “first manner” Italjet which will also be referred to later. It comes from the “lamellar” propeller (rotary induction), with the 17 mm carburetor in direct communication with the crank arm. Always with 4% lubrication.”
In the 70’s and 80’s this engine was incorrectly referred to as a reed valve (lamellare) type, but it did not have a reed valve. Only 60 of these factory racers had this different intake system, according to moto gran premio e 50ini. Instead of piston-controlled intake (induction), it had crankshaft-controlled (rotary valve) induction. That’s what Vespa Ciao had since 1968, and Yamaha had since 1961. The reed valve had not been invented yet. It was later invented by Yamaha and first produced in 1973.
’66?-69? P4 60 QM (motor-car)
58.1cc (41.0 x 44) this also had that long stroke crank
Motori Minarelli is born: In 1967 the company name and logo changed, from F.B. Minarelli to Motori Minarelli. Above in the 1967 ad they showed off their new logo by making it as big as possible, filling an entire page width.
4. 1967-70 Minarelli Late P4S, P4S-70
Late P4S changes: This ’67-73 late P4S is 95% the same as ’65-67 P4S. Only some kick start and gearshift parts are different. This is evident from the illustrations and part numbers.
1. ’67-70 P4S 49.6cc (38.8 x 42) on 2,3. ’70-73? Fantic Chopper, Diablo
4. ’69-70 Indian Papoose, Super Scrambler, ’71 Bobcat 50, Scrambler 50
5. ’72 Indian (Italjet) JC54 , SE54 and ’67-72 Italjet JC54, SE54, others
P4S-70 changes: The case, cylinder, piston and head changed for the bigger bore, from 38.8 to 45.0 mm. In 1971 the crankshaft changed from piston pin bushing type to a needle bearing type.
1. ’71-72 P4S-70 69.9cc (45.0 x 44) on ’71-72 Indian (Italjet) SE74,
2. ’71-72 Broncco (Fantic) Diablo
3. ’72 P4S-70 and ’73 P4V-70 comparison
57 1967# Minarelli# price 5 is P4S, 7 is P4S-70
10 012050 71.0410.0 none piston kit 38.8 ball top
10 012050 71.0410.0 $60.0 piston kit 38.8 GOL 0034
10 012050 71.0460.7 $73.0 piston kit Ø39.0 (1st oversize)
10 012050 71.0460.7 none piston kit Ø39.2 (2nd oversize)
10 012050 71.0460.7 $73.0 piston kit Ø39.4 (3rd oversize)
01 000000 71.0485.7 none piston kit ∅45.0 dome top 1.5 rings
20 012054 68.0115.0 $10.0 piston ring Ø38.8 x 1.5 GN
10 012067 51.0132.7 $5.00 piston pin bushing ∅11.7 ∅15 x 13
10 A24-10 51.0132.7 none (must be reamed after installation)
10 112000 38.0005.0 none crankshaft, pork chop, width 32
10 112000 38.0017.0 none (rod end Ø14.95 x 13 for bushing)
10 112002 77.0152.0 none head (testa) 38.8 Sport QUADRO
10 112004 70.0110.0 none right case P4 rounded
10 112005 70.0610.0 none left case P4 rounded
11 112085 53.0503.9 $7.00 right crank seal 15-30-8or7
10 162003 19.0306.0 none cylinder iron 38.8 M32 ex thread
40 162010 49.0509.0 $3.50 cylinder stud M6 x 109 (110)
40 162011 49.0304.9 $0.60 head nut M6 x 6
40 162012 49.0603.9 $0.20 head washer ∅6
10 162174 53.0302.0 none base gasket ∅44 40×40
11 162181 53.0506.9 $7.50 left crank seal 17-35-8or7
11 162190 51.0205.9 $10.0 left crank bearing 17-40-12 #6302
11 162191 51.0203.9 $10.0 right crank bearing 15-35-11 #6202
10 811901 00.0000.0 none carb Dellorto UA18? side-float
01 811901 00.0000.0 none carb Dellorto SHB 19/19
10 912301 00.0000.0 none magneto 6V 18w internal spark
10 000000 71.0611.7 none gasket set P4-SP iron
5. 1971-75 Minarelli P4V, P4V-70, P4V-75
Minarelli part numbers changed sometime around 1970.
P4V changes: The ’60’s rounded engine covers became angular, to fit the same rounded cases. In 1971 the crankshaft changed from axe (mannaia) shaped, also called pork chop shaped, with piston bushing 38.0005.0, to full circle with piston bearing 38.0017.0.
1. 1971-75? P4V 49.6cc (38.8 x 42), 2. P4V parts, 3. P4V list
4. 1973-74 P4V-70 69.9cc (45.0 x 44) on Indian SE/ME/MX74
and ’74-75 P4V-75 74.7cc (46.5 x 44) on Indian ME/MX74
# VPP Indian# 0 Minarelli# price V=P4V, P=P4V-70, P=P4V-75
0 100 2000.1000 38.0017.0 none crankshaft ’71-on 50cc ∅15 x 42
0 011 2120.1018 00.0000.0 none crankshaft ’72-75 70cc ∅15 x 44
1 800 2000.1000 49.0863.9 $1.00 cover screw M6 x 30 allen black
1 088 2300.1121 00.0000.0 1 -.60 cover screw M6 x 30 slot
2 111 2110.1008 51.0301.9 $9.00 piston bearing Ø12 Ø15 x 15
3 100 2000.1000 56.0601.0 $9.50 piston pin ∅12 x 31.5
3 010 2110.1009 00.0000.0 $0.00 piston pin ∅12 long
3 001 2150.1010 00.0000.0 $0.00 piston pin ∅12 longer
4 222 2110.1010 03.0213.0 $1.50 piston pin clip Ø12
5 100 2000.1000 71.0410.0 none piston kit 38.8 ball top
5 100 2000.1000 71.0410.0 $60.0 piston kit 38.8 GOL 0034
5 010 2110.1011 00.0000.0 none piston kit 45.0 std 70cc
5 001 2150.1001 00.0000.0 none piston kit 46.5 std 75cc
6 200 2000.1000 68.0115.0 $10.0 piston ring Ø38.8 x 1.5 GN
6 100 2000.1000 71.0805.0 none ring set 38.8 x 1.5 GN std 50cc
6 010 2110.1016 00.0000.0 none ring set 45.0 x 1.5 GN std 70cc
6 001 2150.1006 00.0000.0 none ring set 46.5 x 1.5 GN std 75cc
7 111 2300.1024 49.0124.8 none flywheel key 3.0-3.7-9.6 use M85
7 111 2301.1024 49.0125.8 $2.00 flywheel key 3.0-3.6-9.5 M85 note 1
8 222 2300.1028 51.0207.9 $16.0 L/R crank bearing 6203/C3
9 222 2110.1121 53.0506.9 $7.50 L/R crank seal 17-35-8 or 7
10 111 2110.1023 16.2044 none pinion gear key (to 3-’74) note 2
11 222 2110.1026 51.0203.9 $10.0 bearing 6202
12 222 2110.1099 49.0603.9 $0.20 intake washer ∅6
13 111 2120.1024 01.0304.7 none main shaft Z=10-14-18-20
15 111 2110.1028 51.0137.0 none L main shaft bushing ∅13-17 x 12
25 111 2110.1041 51.0137.0 none R drive bushing ∅13-17 x 13
28 111 2110.1042 49.0682.0 none drive washer ∅15-35 x 1
29 111 2110.1043 53.0502.9 $6.00 drive seal 15-24-5
32 111 2000.1000 49.0313.9 none sprocket nut
33 111 2110.1052 40.0802.7 none pinion gear 13T
34 011 2110.1054 00.0000.0 none pinion gear washer
35 111 2110.1055 49.0310.0 none pinion gear nut
49 111 2000.1000 49.0317.0 none clutch nut M14-1.0
58 100 2000.1000 70.0110.0 none right case half ∅44 P4V
58 010 2120.1013 00.0000.0 none right case half ∅47 P4-70
58 001 2150.1029 00.0000.0 none right case half ∅48 P4-75
59 100 2000.1000 70.0610.0 none left case half ∅44 P4V
59 010 2120.1013 00.0000.0 none left case half ∅47 P4-70
59 001 2150.1028 00.0000.0 none left case half ∅48 P4-75
60 111 2120.1017 53.0332.0 none case gasket
61 222 2120.1016 56.0255.0 none mount sleeve ∅8-10 x 30
62 100 0000.0000 49.0861.9 $0.80 case screw M6 x 20 allen black
62 011 2120.1040 00.0000.0 $0.80 case screw M6 x 20 slot
63 200 0000.0000 49.0867.9 $1.40 case screw M6 x 50 allen black
63 022 2120.1014 00.0000.0 1 -.70 case screw M6 x 50 slot
64 100 0000.0000 49.0869.9 --N/A- case screw M6 x 65 allen black
64 011 2120.1085 00.0000.0 $0.80 case screw M6 x 65 slot
65 400 0000.0000 49.0865.9 $1.20 case screw M6 x 40 allen black
65 044 2300.1079 00.0000.0 1 -.70 case screw M6 x 40 slot
66 300 0000.0000 49.0862.9 $0.80 case screw M6 x 25 allen black
66 033 2110.1081 00.0000.0 $0.70 case screw M6 x 25 slot
66a 5000000.0000 49.0863.9 $1.00 clutch screw M6 x 30 allen black
66a 055 2300.1121 00.0000.0 1 -.60 clutch screw M6 x 30 slot
67 111 2300.1083 53.0473.0 $1.00 drain plug gasket ∅8-16 x 1
68 111 2300.1082 49.0911.9 $2.00 drain plug M8 x 10 hex13
69 111 2120.1011 26.0188.0 none oil splash plate
70 333 2300.1085 49.0629.9 $0.20 washer M4
71 333 2300.1086 49.0841.9 $0.50 screw M4 x 10 phil-wide
72 111 2120.1010 53.0352.0 none clutch gasket oval 6-hole
73 111 2120.1009 21.0212.0 none clutch cover 6-hole
75 111 2110.1082 53.0402.0 none name plate gasket
76 011 2110.1083 00.0000.0 none name plate “Indian”
77 222 2110.1084 49.0936.9 $0.90 name plate screw M4 x 12 phil-sunk
80 111 2300.1081 53.0401.0 $2.00 fill plug seal washer ∅12
81 111 2300.1080 24.0250.0 $8.00 fill plug
82 111 2120.1008 24.0153.0 none wires grommet
83 333 0000.0000 49.0841.9 $0.50 stator screw M4 x 10 phil-wide
84 100 2000.1000 82.0012.9 none magneto Ducati 31.02.30 ∅94
84 100 2000.1000 82.0014.9 none magneto Ducati 31.02.39 ∅94
84 011 2110.1085 00.0000.0 none magneto Ducati 31.02.38 ∅94
85 111 2300.1094 49.0312.0 $7.00 flywheel nut M10-1.25 x 14 hex15
87 111 2120.1005 21.0312.0 none magneto cover
89 400 2000.1000 49.0509.0 $3.50 cylinder stud M6 x 109 (110)
89 044 2110.1124 49.0513.0 $3.50 cylinder stud M7 x 118
90 044 2300.1108 49.0604.9 $0.20 head washer M7
91 400 2000.1000 49.0304.9 $0.60 head nut M6 x 6
91 044 2300.1109 49.0306.9 $1.20 head nut M7 x 7
92 100 2000.1000 53.0302.0 none base gasket ∅44 40×40
92 011 2110.1086 53.0306.0 none base gasket ∅48 48×48
93 100 2000.1000 19.0306.0 none cylinder 50cc ∅38.8-44 iron M32
93 010 2110.1087 00.0000.0 none cylinder 70cc ∅45.0-47 aluminum
93 001 2110.1087 00.0000.0 none cylinder 75cc ∅46.5-48 aluminum
94 100 2 000.1000 53.0417.0 none head gasket ∅40-55 x 0.7
94 010 2110.1088 00.0000.0 none head gasket ∅47-55 x 0.7?
94 001 2150.1012 00.0000.0 none head gasket ∅48-55 x 0.7?
95 100 2000.1000 77.0152.0 none head (testa) Sport QUADRO
95 100 2000.1000 77.0161.0 none head (testa) Sport RECORD
95 011 2110.1089 00.0000.0 none head 70-75cc
98 100 2110.1091 00.0000.0 none intake gasket
99 100 2120.1003 00.0000.0 none intake pipe
100 200 2110.1093 49.0304.9 $0.60 intake nut M6 x 6
101 100 2000.1000 15.0016.9 none carb SHA14/12 jet 52 F27 use 15.0024.9
101 100 2000.1000 15.0024.9 $70.0 SHA14/12 jet 52 US 2.0 hp
101 100 2000.1000 15.0000.6 $0.00 ∅18 sleeve, no air cover, no cable pipe
101 100 2000.1000 15.0000.6 $0.00 for parts list see Carb/Dellorto/SHA14 .
102 011 2110.1096 00.0000.0 none exhaust flange
103 011 2110.1095 00.0000.0 $0.00 exhaust gasket
104 044 2110.1097 49.0631.9 $0.30 exhaust washer ∅6
105 044 2110.1098 49.0204.0 $0.00 exhaust nut M6 x 23
107 111 2110.1100 49.0922.0 none bolt M12 x 26
108 111 2300.1114 53.0471.0 none seal washer ∅12
147 111 2300.1151 49.0622.9 $1.00 flywheel washer M10 thin
Note 1. Indian Service Bulletin SVB-153: In March 1974 the flywheel key 2300.1024 changed to 2301.1024, slightly shorter. That improved the seating (fit) of the flywheel, so it had less tendency of becoming loose and damaging the key and key groove.
Note 2: Indian Service Bulletin SVB-153: In March 1974 the pinion gear key 2110.1023 was eliminated. It is not needed as long as the pinion gear nut is tight. The key was on the ’67-70 P4S but was already eliminated on the ’71-75 P4V. That’s why there is only a 1960’s Minarelli part number for it.
6. 1971-79 Minarelli P4E, P4E-al
P4E changes: The engine case changed from round to angular. The cylinder hole grew from ∅44 to ∅47. The cylinder studs grew from 40×40 to 48×48. This made room for bigger ports for more power, and made bigger bores 70 or 75cc possible, also for more power. The pork-chop all-needle-bearing P4V crankshaft became a full circle type. The exhaust bolts to the cylinder with a 3-bolt flange, instead of screwing on with a special inverted nut.
‘
1,2,3. ’71-79? P4E 49.6cc (38.8 x 42) Export in ghisa (iron)
4. ’78-79? Italjet SX50, 5. ’78-79? Italjet CX50
‘ 
1,2,3. ’71-79? P4E-al 49.6cc (38.8 x 42) Export in aluminio
flat top (testa piatta) piston, L-ring, 4. ’78-79 Italjet CX50R
PPa figure Minarelli# price P is P4E, P is P4E-al, a is P4A
100 00015 15.0029.9 none carb SHA 14/12, F27 cover
100 00015 15.0024.9 $70.0 SHA14/12 jet 52, no cover
100 00015 15.0000.6 $0.00 ∅18 sleeve, no cable pipe
010 00015 15.0029.9 none carb Dellorto SHB 19/19D
100 00019 19.0314.0 none cylinder iron ∅44 ∅32 3-bolt
010 00019 19.0002.0 none cylinder alu. ∅47 ∅?? 4-bolt
100 00031 31.0010.6 $12.0 air cover F27 large sloping
100 00068 71.0410.0 none piston kit 38.8 ball top
100 00068 71.0410.0 $60.0 piston kit 38.8 GOL 0034
010 00068 71.0413.0 none piston kit flat top L-ring
010 00068 71.0463.7 none piston kit oversize
100 00077 77.0115.0 none head (testa) EXPORT GHISA
010 00077 77.0110.0 none head (testa) NORMALE
010 00077 77.0111.0 none head (testa) SP bigger fins
100 00082 82.0014.9 none magneto Ducati 31.02.39 2-wire ⇐, ext. spark coil
100 00212 21.0232.0 none clutch cover grey
100 00212 21.0233.0 none clutch cover black
100 00214 21.0328.0 none magneto cover grey
100 00214 21.0335.0 none magneto cover black
100 00381 38.0037.0 none crankshaft cone ∅15 full circle
200 00681 68.0115.0 $10.0 piston ring Ø38.8 x 1.5 GN
100 00681 71.0805.0 none piston ring set
100 00701 70.0116.0 none right case half for ∅47 cylinder
100 00702 70.0616.0 none left case half for ∅47 cylinder
100 00821 82.0006.6 $16.0 points (ruttore) CEV 04229 = M14
100 00823 82.0132.6 $13.0 condenser Ducati ∅17.9 = M17
100 05113 51.0301.9 $9.00 piston bearing Ø12 Ø15 x 15
110 05320 53.0306.0 none base gasket ∅47 48×48
100 05670 56.0601.0 $9.50 piston pin Ø12.00 x 31.5
200 09323 03.0213.0 $1.50 piston pin clip Ø12
100 15000 15.0000.6 $0.00 for full list see Carb/Dellorto/SHA14.
100 15105 15.0360.6 $5.00 6109 fuel filter
100 15130 15.0410.6 $5.00 1486/52 main jet #52
100 15170 15.0490.6 $2.00 6123 float gasket
100 15255 15.0601.6 $7.00 9249 inlet banjo black plastic angled out
100 15300 15.0701.6 $10.0 2838 float needle
100 49005 49.0018.0 $4.00 air cover clamp with screw
100 49015 49.0124.8 $2.00 woodruff key (chiavetta) #M85 3.0 x 3.6
440 49037 49.0306.9 $1.20 head nut M7 x 7
100 49039 49.0310.0 none pinion nut
100 49040 49.0312.0 $7.00 flywheel nut M10-1.25 x 14 hex15
100 49041 49.0313.9 none sprocket nut
100 49042 49.0317.0 none clutch nut M14-1.0
440 49084 49.0513.0 $3.50 cylinder stud 7 x 118.5 (120)
600 49226 49.0841.9 $0.50 stator screw M4 x 10 phil-wide
page 66, 68 Minarelli P4 P6 magneto, carburetor parts (026 missing)
page 70: Minarelli P4 P6 transmission parts, covers, levers, tools
Crankshaft parts for all motors 1960’s – 70’s