Puch Korado

June 14, 2015

1959 Manet ad

1950 Manet M90 ad

Manet

Manet is a division of Povážské Engineering Works, National Corporation, Povážská Bystrica, Czechoslovakia. Manet motorcycle history began in 1947 with the production of the M90. It was a 93cc two-stroke single cylinder but it had two pistons. It produced 2.6kW at 4500 rpm. By the year 1951, when production ended, 37,630 M90s were produced.

The Jawa-Manet alliance is shown in this 1959 advert for the US-model Manet scooter, “The scooter for all occasions”. It has a 100cc two-stroke 3-speed grip-shift engine. “Fast enough for the highway”.

Red star is where ’94-06 Manet and pre-’86 Jawa mopeds were made.
Green star is where 1986-1995 Jawa (Babetta) mopeds were made.

All through the 1960’s, 70’s, 80’s the Jawa and Babetta names were used for Czech mopeds instead of Manet. See myrons jawa info

Before the 1990’s, all Czechoslovakian companies were nationally owned, and so their names appear together in ads, like CZ, Jawa, Babetta, Manet and others. Starting with the fall of socialist economies in 1990, and the privatization of industries, many companies faced increasing costs, and decreasing market demand, as Slovakians were free to purchase from outside the country. In 1993 Czechoslovakia was split into Czech Republic (now called Czechia) at the northwest side, and Slovakia at the southeast side. The brand name Manet was revived in the privatization and restructuring. 

 

 


Manet Korado

1995 Manet Korado ad

The Manet Korado was made in Slovakia by PS Motor Manet from 1994 to 2008, and sold in the US as Puch Korado from 1995 to 1999. It was made in the same factory that pre-1986 Jawa Babetta mopeds were made at, Povážské Strojárne (PS) (Povážské Engineering Works) near the city of Povážské Bystrica in north-central Slovakia.

At the same time the first Manet mopeds were made, in 1994-95, the last Jawa mopeds were made in the small agricultural town of Kolárovó, in southern Slovakia near the Hungarian border. While the Manet Puch Korado was made with Piaggio top notch equipment and modern methods, the last few years of Jawa’s were made using obsolete, worn-out equipment with not enough expertise and concern for quality.

Here is the story of the end of Puch summarized from http://www.jawamoped.com/html/manet_korado.html

After Puch closed it’s doors in 1987, the moped production equipment was sold to Maxwell, in Turkey, Piaggio, in Italy, and Hero, in India. Puch had developed the Super Maxi, with a catalytic exhaust, an improved right-side air filter, and an improved cylinder with 4 transfer ports and a boost port. Maxwell in Turkey produced Puch Super Maxi remakes, but they had quality issues, and were not successful. Puch had developed the advanced Maxi Plus (Austro-Daimler), with help from Ferdinand Porsche. Hero produced Maxi Plus remakes into the 2000’s. Piaggio produced Puch Super Maxi remakes in Italy until 1997. Piaggio then sold the Puch rights and engine production equipment to Manet in Slovakia. In 1998 Piaggio destroyed the molds and equipment for making the Maxi.

Manet bought the engine production line in 1994, and moved it to Povážská Bystrica in Slovakia. They developed their own frame and moped, called Manet Korado. The first engines were of low quality, but they learned quickly. Here is a translation from http://mpkorado.cz/en/ They are currently an accredited importer of mpKorado scooters, electric bicycles and VCAN helmets for the Czech Republic, since 1994.

MP KORADO CZ, s.r.o. imported over 16,500 Manet Puch Korado mopeds, made in Povážské Bystrica, Slovakia, to the Czech Republic from 1994 to 2006. In 1994 the Korado immediately became a very popular means of transport for Czech customers, and disrupted the sales of Babetta (Jawa) mopeds made in Kolarova, Slovakia. It was the best selling machine in it’s category, and contributed the end of Jawa Babetta moped production. Manet Korados were produced in four motor versions, all with one-speed automatic transmissions: Puch Maxi or Super Maxi, pedal-start or kick-start. The mopeds were supplied in six basic colors.

By 2006 the factory at Povážská Bystrica stopped moped production completely. Povážské Strojárne Motor Manet transformed into VVED, and produced agricultural light equipment.

 


Manet Korado US Models

1995 Puch Korado ad

The flyer at right is screaming the logos and word PUCH, while not mentioning the true maker Manet. The US models were called Puch Korados. They were imported and distributed by American Jawa Ltd. 185 Express St, Plainview NY 11803. In the late 1970’s Puch was the best selling moped in America. American Jawa knew that many Americans knew the name Puch, or they had one and liked it.

1995 American Jawa Price List

 

 

 

 

 

 

 

 

 

 

Local history: The 1995 suggested retail price for the “Puch” was $1099. That was slightly more than a comparable 1995 Tomos Sprint for $999. Some of the Puch Korado dealers were Steves Mopeds in Dumont NJ and Mr. Moped in Sarasota FL. But there were no Puch Korado dealers in California. So there are no Korado-specific parts at Myrons Mopeds. Even though Shaun was actively servicing one or two hundred Southern California mopeds each year, at Royal Cyclery and later at Myrons Mopeds, he did not see a Puch Korado in person until 2009, 14 years after they came out. And that one Korado was brought into California only because the internet, that allowed people to easily buy things from far away places.

Specifications: The Korado Owners Manual lists specifications. Power 2.0kw (2.6hp), speed 40km/h (26 mph), weight 57.5kg (126 lb) 20lb heavier than a Puch.

Korado 1.5kW (2.0hp)
8-side-fin cylinder

Korado 2.0kW (2.6hp)
9-side-fin cylinder

Speed Versions: Korado engines (cylinders, heads, pistons and cases actually) have two speed versions. Both are 38mm bore, 49cc displacement.

Most US and European models have the 2.0kW (2.6hp) cylinder Super Maxi. It can be identified from a distance by the 9 side fins. It is like a 1979 Puch Magnum, but the piston has transfer port holes, and the cylinder has way more transfer ports. So it “gulps” more air and fuel with each stroke.

Some US and European models have the 1.5kW (2.0hp) cylinder called Maxi. It can be identified from a distance by the 8 side fins. It is exactly like a 1979 Puch Maxi Luxe cylinder.

16 inch 90×20 V-spring
Bernardi Mozzi Motors wheels on Puch Korado

Wheels: The drum brake specified in the owners manual is 85 x 20mm, and tires 2.25 – 16″, like Jawa spoke wheels. From the owners manual photos, the brake arms look like Jawa ones. But none of the 100 or so Manet Korado photos on Google Images have spoke wheels. 97 out of 100 have white Bernardi 3-ray mag wheels, and the rest have other mags. So only the prototype Korado had 16″ Jawa-type spoke wheels. Almost all others have 16″ 3-ray Bernardi wheels, that take Bernardi 90×20 or Grimeca 90×18 brakes. The cast aluminum front brake plate in the photo at right is identical to Puch-made ones for the Grimeca “snowflake” wheels with 90×18 brake drums. So much of the owners manual is out-dated, because things on the bike changed, but the manual did not.

There are pedal and non-pedal (kick) versions offered. By the mid 1990’s many European countries followed Germany and dropped the requirement for pedals on mopeds. Many US states followed Europe and allowed “no-peds” to be classified as mopeds (motorized bicycles).

System 4, for all US-models and some Euro

Electrical: There are four Korado electrical systems. System #1 and #2 are for European models with a ring-ring bell and no brake light. System #3 is for Euro models with an electric wrong-answer buzzer and no brake light. Electrical system #4 is the deluxe pizza with all the toppings, for all US models and some Euro models.

1.  6 volt 20 watt generator with points-and-condenser ignition
1.  6V 15W head light, 6V 5W tail light

2. 12 volt 40 watt generator with point-less electronic ignition
2. 12V 15W head light, 12V 5W tail light, 12V 1.2W speedo light

3. 12 volt 40 watt generator with point-less electronic ignition
2. 12V 15W head light, 12V 5W tail light, 12V 1.2W speedo light
3. 12V AC horn 

4. 12 volt 40 watt generator with point-less electronic ignition 
4.. 12V 21W head light, 12V 4W tail light, 12V 1.2W speedo light
 4. 12V AC horn, 10W brake light, optional 12V 10W turn lights

Owners Manual: Here is a link to the Manet Korado owners manual: http://projectmopedmanual.info/Manuals/Puch/Puch-Korado-owners-manual.pdf

Identification: US models said Korado, or nothing, on the gas tank. Some European models also said nothing on the tank, but most Euro models said Manet Korado. US models all had wiring system #4, with a engine stop button operated by the right thumb. Some Euro models also had that. But only US models have a US-DOT-compliant ID plate, that says “This vehicle conforms to all US safety standards in effect on the date of manufacture above”. And only Euro models have bells and engine stop buttons operated by the left thumb. Euro models with electrical systems 1, 2, and 3 have a different shaped headlight. If you see that, and no red button on the right thumb, it is a Euro model. Compare the 1995 blue with the 1999 blue below. 

You can tell the speed version from a photo, by the number of engine side fins. Maxi is 8-fin, Super Maxi is 9-fin.

1995 Puch Korado blue
pedal-start, Euro-model
9-side-fins Super Maxi

1996 Puch Korado red
pedal-start, Euro-model
8-side-fins Maxi

1996 Puch Korado white
pedal-start, US-model
9-side-fins Super Maxi

1999 Puch Korado blue
pedal-start, US-model
9-side-fins Super Maxi

 

 

 

 

 

 

 

1999 Manet Korado red
kick-start, Euro-model
9-side-fins Super Maxi

Euro and USA version Korado tank decals

Korado engine case
Super Maxi version

 

 

 

 

 

 

 

 


Spare Parts

Spare parts for the Manet Korado moped can be obtained from MP KORADO CZ, s.r.o. http://mpkorado.cz/en/ They are an accredited importer of mpKorado scooters, electric bicycles and VCAN helmets for the Czech Republic. On the Czech market since 1994.

Spare parts for Korado and Jawa can be obtained from JawaParts.com, since 1992. https://www.jawaparts.com/  But they won’t ship to customers in the USA, for some reason.

Much more info and photos of parts are here http://www.mopedarmy.com/wiki/Puch_Korado

 

Myrons Mopeds does not have actual Korado parts, but has many things for other mopeds that are the same.

Gas cap: screw-on

Gas valve: M22-1.0 thread, like Jawa but with long shaft, round knob, see Gas Valves

Speedometer

Speedometer: made by Facomsa

Front Wheel: 16″ Bernardi 3-ray, white, sealed bearings, 90×20 drum
Front Wheel: 90 x 20 Bernardi or 90 x 18 Grimeca V-spring brake shoes, see Brakes

Rear Wheel: 16″ Bernardi 3-ray, white, sealed bearings, 90×20 drum
Rear Wheel: 90 x 20 Bernardi or 90 x 18 Grimeca V-spring brake shoes, see Brakes
Rear Wheel: 18 tooth freewheel with standard threads, see Pedal Parts

Front Axle: 12mm smooth, M12-1.5 thread (same as Jawa) see Jawa Parts
Rear Axle: 12mm smooth, M12-1.5 thread (same as Jawa) see Jawa Parts

Sprocket 45T 5-hole

Front Sprocket: 14 or 15T (same as Puch)

Rear Sprocket: 45T 5-hole (different than Puch)

Tires: both 2.25 – 16, see Tires and Tubes

Engine: Puch 1-speed, two different cases, cylinders, heads, and pistons:
Engine: 1.5kw (2.0hp) Maxi version 8-side-fins
Engine: 2.0kw (2.6hp)  Super Maxi  9-side-fins, piston has transfer holes

Crankshaft: needle bearing rod, upper and lower (same as 1984-86 Puch)

Gears: Korado helical-cut gears are “reverse cut” opposite of Puch original

Puch and Korado gears

Helical-cut means the gear teeth are slanted. The benefit of helical-cut gears is much less noise or “whine”. The drawback is some of the driving force is diverted to the side. The Korado gears are forced to the opposite side as Puch gears.

Clutch:

 

 

Bing 18-14-180

Carburetor: 14mm Bing 18/14/180, “1990’s square Bing”
Carburetor: bigger than Maxi Plus (Austro Daimler) 18/12/107 or 18/12/106
Carburetor: see Bing Carburetor scroll down to Bing Austro Daimler

Jet:

Air filter:

Gasoline:

 

Right Control: Domino 1990’s all black, sliding block with pinch bolt
Right Control: Electrical system 1, 2, 3, plain, no switch mount
Right Control: Electrical system 4, with rectangular switch mount

Euro model with bell, wiring system 1 or 2

Wiring system 4

 

 

 

 

 

 

Left Control: Domino 1990’s all black,
Left Control: pedal versions have a start lever, kick versions do not
Left Control: Electrical system (all), with rectangular switch mount

Cables: The double-ended brake cables are not the same as Puch,
Cables: because the Domino controls do not use Magura adjusters
Cables: 19
Cables: 20
Cables: 21
Cables: 22
Cables: 22

 

 

 


Odyssey Parts

June 13, 2015

For identification see Odyssey Models

Regular Transmission Models
32/1-R  32kph (20mph) 11 x 53T Solo 254, thin exhaust
40/1-R  40kph (25mph) 14 x 53T Solo 255 engine
40/2-R  47kph (29mph) 15 x 50T Solo 255 engine

2-speed Transmission Models
32/1-2
  32kph (20mph) 11 x 53T Solo 254, thin exhaust
40/1-2  40kph (25mph) 14 x 53T Solo 255 engine
40/2-2  47kph (29mph) 15 x 50T Solo 255 engine

 

 

Odyssey Parts Manual

 

Odyssey Parts Manual, first edition, April 1977



xx qty R is Regular, 2 is 2-speed
fig R2  Odyssey# price  Crank and Cylinder Parts
01 22 00 50 102 $10.0 crank bearing 6202 C3
02 10 22 00 641 none  disk clutch crankshaft
02 01 22 00 657 none  shoe clutch crankshaft
04 22 00 31 375 $0.00 crank washer 15.3 x 22 x 0.5
06 11 00 75 101 $2.00 flywheel key M85 3 x 3.7
08 11 00 30 144 $0.00 flywheel washer 8.4 10
09 11 00 20 161 $4.00 flywheel nut M8 left M10-1.0 x 6 hex17
10 11 00 34 115 $0.00 star washer 8 10
11 11 22 00 593 $0.00 piston complete N
11 11 22 00 600 $0.00 piston complete U
12 22 20 48 227 $0.00 piston ring N
12 22 20 48 249 $0.00 piston ring U
13 11 20 31 238 $10.0 piston pin 10 x 32
14 22 00 55 144 $1.50 piston clip
15 22 00 15 201 $0.00 exhaust stud
16 22 00 30 100 $0.00 washer 6.4
17 22 00 28 100 $0.00 nut M6 thermac
18 11 22 00 595 none  cylinder N for 32/1
18 11 22 00 594 $0.00 cylinder N
18 11 22 00 603 none  cylinder U for 32/1
18 11 22 00 604 $0.00 cylinder U
19 11 20 00 601 none  head for 32/1
19 11 20 00 602 $0.00 head
20 11 20 61 337 $0.00 head gasket
21 11 20 61 346 $9.00 base gasket
23 11 00 31 336 $0.00 “friction” washer 15 x 25.6 x 0.5
24 10 00 35 134 $9.00 disk clutch tab washer
25 10 00 20 107 $4.00 disk clutch nut M10-1.0×6
26 11 00 52 186 $0.00 needle bearing 10 x 14 x 13
27 11 00 61 255 $1.50 seal washer 5 x 9 x 1
28 11 00 10 266 $0.50 drain screw M5 x 15 (16) slot
29 11 00 62 159 $0.00 o-ring 101.3 x 2.6
30 22 00 55 106 none  inner retaining ring 35
31 11 00 16 126 $0.00 fill plug M10-1.0
32 11 00 61 210 $0.00 seal washer 10×14

 



xx qty R is Regular, 2 is 2-speed
fig R2  Odyssey# price  Crankcase Parts
01 10 21 00 300 none  disk clutch crankcase for 32/1-R
01 01 21 00 321 none  shoe clutch crankcase for 32/1-2
01 10 21 00 301 none  disk clutch crankcase
01 01 21 00 322 none  shoe clutch crankcase
02 11 00 42 208 $0.00 crankcase pin
03 66 00 10 161 $0.80 case screw M6 x 50 slot
05 11 00 54 203 $12.0 left crank seal 26 x 35 x 7
06 11 00 66 217 $0.00 wires grommet
07 11 00 62 112 $0.00 intake o-ring
08 11 20 61 334 none   case gasket
09 66 00 34 107 $0.25 lock washer 6
11 44 00 20 169 $0.30 head nut M6
15 10 20 45 460 $0.00 clutch cover
15 01 00 45 455 $0.00 clutch cover
17 11 00 45 455 $0.00 magneto cover
21 44 00 15 158 $0.00 stud M5 x 15
22 44 00 34 103 $0.25 lock washer 5
23 44 00 20 101 $0.40 nut M5
26 44 00 31 292 $0.20 head washer M6
27 11 20 12 448 $0.00 intake manifold
28 11 20 61 284 $0.00 intake gasket
29 11 20 74 525 $0.00 reed housing
30 22 20 42 000 $0.00 reed petal
31 11 20 63 000 $0.00 reed petal holder
32 44 00 15 226 $0.00 cylinder stud
33 11 00 54 128 $7.00 right crank seal 15 x 35 x 7

 



xx qty R is Regular, 2 is 2-speed
fig R2 Odyssey# Batavus# price  Disk Clutch Regular Trans. 
01 10  30 23 313 000000 none  start lever
05 10  35 00 286 000000 none  clutch drum complete
06 20  00 52 104 000000 none  needle bearing HK1512 15 x 21 x 12
07 20  00 54 195 000000 $6.00 seal ring 15 x 21 x 3
08 10  00 72 124 480887 $8.00 saucer spring 28 x 12.2 x 1
09 10  35 00 220 480881 none  alum. hub with steel saucer
09 10  35 00 220 480881 $35.0 steel saucer only
10 10  35 00 232 480886 $30,0 weight-spring ring
11 10  30 41 322 000000 $20.0 steel plate
12 10  30 76 123 480889 $32.0 friction plate
13 10  00 70 194 480883 $8.00 start spring
14 10  35 00 219 000000 $45.0 start plate
15 10  30 42 315 480890 $12.0 end plate
16 60  00 34 103 843500 $1.00 wave washer 5
17 60  00 20 101 827500 $0.40 nut M5
18 40  00 73 230 000000 $6.00 dampening leaf spring
19 10  70 43 856 000000 $12.0 start lever plate
21 20  00 12 164 000000 $1.00 screw M5 x 18 hex
22 20  00 34 147 000000 $0.25 lock washer 5
23 20  00 30 108 000000 $0.20 washer 5

Much of this clutch assembly is the same as the clutch on a Laura M48 engine used on Batavus mopeds. Those items that are the same have Batavus part numbers listed.

 



xx qty R is Regular, 2 is 2-speed
fig R2 Odyssey#  price  Shoe Clutch 2-speed Trans. 
01 01 00 00 000 none  x
02 01 00 00 000 none  x
03 06 00 00 000 none  x
04 03 00 00 000 none  x
05 03 00 00 000 none  x
06 03 00 00 000 none  x
07 01 00 00 000 none  x
08 01 00 00 000 none  x
09 02 00 00 000 none  x
10 01 00 00 000 none  x
11 02 00 00 000 none  x
12 02 00 00 000 none  x
13 02 00 00 000 none  x
14 01 00 54 202 none  clutch seal 12 x 22 x 7
15 01 00 52 193 $13.0 needle bearing 15 x 21 x 22
16 01 35 00 258 none  clutch drum complete
18 11 00 31 336 none “friction” washer 15 x 25.6 x 0.5
19 11 00 54 203 $12.0 left crank seal 26 x 35 x 7
20 01 00 31 385 none  washer
21 01 00 31 386 none  washer

 

 

 


 

 


See Carburetor/Bing-Solo

 


Odyssey Parts Manual, first edition, April 1977
Odyssey Parts Manual, first edition, April 1977, non-engine section

 

Link to Project Moped Manual for the Odyssey Service Manual, for more info.

 

 

 

 


Steering

May 14, 2015

Bicycles are external, motorcycles are internal.

Welcome. Steering bearings on most bicycles are external type, where the bearings lie outside the frame head tube (which is “not stepped”). Steering bearings on most motorcycles are internal type, where the bearings lie inside the frame head tube (which is “stepped”). All mopeds have the bicycle type steering bearings, except Derbi, which has motorcycle type.

Balls Up or Balls Down is the famous question faced when installing retainer (caged) ball bearings. The lower bearing always faces balls down, but the top bearing is sometimes facing up, and sometimes facing down. When it is installed wrong the cage gets crushed. The answer is: the balls always face the “cone” and not the “cup”, regardless of “up” or “down”. Sometimes the upper frame race is a “cone”, sometimes it is a “cup”.

Any bearing, when pushed together lightly with your fingers, should feel like the balls are rolling. Nothing should feel like it’s scraping or sliding. When you see the balls rolling at half the rotation speed, and the feel is solid and smooth like an ice cube on a smooth table, then the bearing is correct and good. 

Caged Balls or Loose Balls can be interchanged. The cage/retainer is a convenience, that keeps the balls from falling out during installation. If the retainers are the wrong size, or bent, but the balls are correct, the balls can be popped out, and installed using grease to hold them. When the cage is eliminated, almost twice as many balls are required, enough to fill the circle with a half to one ball gap. This has another big benefit on worn out races that have dents where each ball was at. When the number of balls changes, say from 14 to 26, the dents do not line up anymore. So it’s almost like having a new race.

Bicycle headset threads and dimensions, from Sutherlands

Bicycle headset threads and dimensions, from Sutherlands Handbook

Slight Differences in steering threads have frustrated many bicycle and moped mechanics trying to substitute steering parts from one machine to another. At right is a chart of bicycle headset threads and sizes. Basically the whole world uses ISO threads, one inch with 24 threads per inch (25.4 x 1.06), except France (25.0 x 1.00), Austria (26.0 x 1.00), Raleigh (25.4 x 1.02), and motorcycles (24.0 x 1.00). None of these thread sizes interchange. They either won’t screw on, or they will screw on loosely, and later slip around and “strip”. 

Slight Differences in “30mm” frame cups, from 30.0 to 30.2 millimeters, turn out to not matter, ordinarily. Only when the fit is already too loose on a 30.2, or too tight on a 30.0, would it matter.

30.0 replacing 30.2: Take a moped frame that has 30.2 cups and pound one cup out with a hammer and punch, alternating sides. Then take a 30.0 cup and hammer it in. You will only have to strike it about half as hard, because it has a looser press fit. It will hammer out easier.

30.2 replacing 30.0: Take a moped frame that has 30.0 cups and pound one cup out with a hammer and punch, alternating sides. Then take a 30.2 cup and hammer it in. You will have to strike it about twice as hard, because it has a tighter press fit. It will hammer out less easy.

There is much confusion about what is 30mm, the cup outer, or the frame inner. A frame for 30.0 cups can be 29.7 to 29.9 mm inner diameter (id). A frame for 30.2 cups can be 29.9 to 30.1. Some cups are made in between, 30.1 mm. The cups for sale below are classified as “30.0 cups” if they measure 29.9 to 30.15 mm. They are classified as “30.2 cups” if they measure 30.16 to 30.25 mm.

Slight Differences in “32.5mm” frame cups, from 32.5 to 32.7 millimeters, turn out to not matter, ordinarily. They range from 32.5 to 32.7, with most around 32.6. 

 

 


1. #52     2. #65     3. #73     4. “Euro”

Bearing Retainers

1   #52 retainer, 15 – 3/16″ balls  31.5 id      $5.00
For traditional American bicycles, AMF, Colombia, etc.

  #65 retainer, 15 – 3/16″ balls  28.5 id      $2.00
For traditional Schwinn bicycles, BMX, and low-end ATB.

3   #73 retainer, 16 – 5/32″ balls  29.0 id      $1.50
For traditional ten-speed bicycles, standard bikes, childrens.
A good substitute for the European 14 – 5/32″ ball retainer.

4   “Euro” retainer, 14 – 5/32″ balls 27.0 id    $8.00
This is like a #73 retainer with an inner lip for stiffness.

Loose Balls

1   5/32 inch (#5) balls (3.97mm), pack of 26        $2   26 loose 5/32″ balls can replace a “Euro” 14-ball retainer. 
For light duty moped and bicycle headsets.                 26 loose 5/32″ balls can replace a #73 16-ball retainer.

2   3/16 inch balls (4.76mm), package of 26          $2   22 loose 3/16″ balls can replace a #65 15-ball retainer. 
For heavy duty headsets, and some wheels.                22 loose 3/16″ balls can replace 21 loose 5mm balls

3   5 millimeter balls (5.00mm),  pack of 21           $5   21 loose 5mm balls can replace 22 loose 3/16″ balls
For Puch Magnum, Sears Free Spirit, and Tomos.          More balls, or bigger balls, can carry more weight.

 

 

Headsets and PartsMyrons Shirt green

In ascending order of thread size (fork), then cup size (frame).

After years of ignorance and misunderstanding, moped headset items have been identified, measured, verified, and presented below. With these measurements and specifications, it is possible to find correct replacements by measuring their sizes precisely with a calipers or a micrometer, and then matching it with the pictures and or brand names below, hopefully. These things have to be somewhat precise. If something is too tight it might not go on. If it’s too loose, or mismatched, the bike might be difficult to control, or be unpleasant to ride.

 

24.0 x 1.00 mm thread

 


Left: External Bearings Right: Internal Bearings

Derbi           24.0 x 1.00 (0.94″- 25.4 tpi), internal

Derbi mopeds have internal steering bearings, like motorcycles have. You can see on the Derbi at the right, the bearings are not visible. But on the Sparta Foxi on the left, the steering bearings are visible above and below the frame head tube. The Sparta has external steering bearings, as do all other mopeds.

Japanese motorcycles usually have this 24×1 thread on the top nut, but further down the steering tube steps up to 25×1 or 26×1 or bigger, where the bearings go.

 

 

25.0 x 1.00 mm thread

 


Peugeot Headset, 25-1.0 thread, 30.0 cups

Peugeot headset, 25-1.0 thread, 30.0 cups

Peugeot       25.0 x 1.00 (0.98″- 25.4 tpi), 30.0 cups

1         51974  complete set #2-10                   $40
2         48684  top chrome cap, press fit            $10-$18
3         51646  lock nut, 5 tall, 32 hex                 $5-$7
4         56118  lock washer serrated                   N/A
5         91783  adjustable cone chrome               $4-$6
5a  This little “nub”, from Peugeot bicycles, must be ground off.
5a  It goes into a ring of holes, a special “holey” washer, not #4.
6         91778  upper frame cup chrome 30.0 od  $8
7        91502a upper balls, 26 – 5/32″ 3.97mm   $2 or use #73
8         91502  lower “Euro” retainer 14-5/32″    $8 or use #73
9         46840  lower frame cup chrome 30.0 od  $8
10       14512  lower cone (crown race)  26.7 id  $5-$8
30.0 cups will replace 30.2 ones. They just press in easier.


Motobecane headset, 25-1.0 thread, 30.2 cups

Motobecane 25.0 x 1.00 (0.98″- 25.4 tpi), 30.2 cups

1         23312  partial set #3,5,6,7,8,9              N/A
2         15528  top plastic cap, press fit            $10$18
3         15526  lock nut, 32 octagonal                $6
4         00000  plain washer 25x35x1                 $2
5        23016a adjustable cone, zinc plated       $8-$12
6        23016b upper frame cup, zinc   30.2 od  $7
7         00005  upper balls, 26 – 5/32″           $2/26 or use #73
8         00005  lower balls, 26 – 5/32″           $2/26 or use #73
9         14208  lower frame cup, zinc   30.2 od  $7
10       19859  steering tube with lower race       N/A
11       14606  lock plate/washer                       $4
12       14605  pivot bolt M20-1.0, 32 oct          $15

 


Vespa Grande set, 25- 1.0 thread, 33.0 cups

Vespa Grande set, 25- 1.0 thread, 33.0 cups

Vespa Grande 25.0 x 1.00 (0.98″- 25.4 tpi), 33.0 cups

Vespa Grande headset is unique, heavy duty, French thread.
3       G68856  chrome cap nut, 32 hex, 25×1    $12-18
3a     000000  Piaggio emblem pressed-in           N/A
4       306912  thin washer for nut                        $3
5       G21316  adjustable cone, 25×1, notched    $15
6       G22937  upper frame cup, zinc    33.0 od   $7.00
7       G21317  upper balls, 27 – 5/32″ 3.97mm    $2/27
8       G21317  lower balls, 27 – 5/32″ 3.97mm    $2/27
9       G22937  lower frame cup, zinc    33.0 od   $7.00
10     G21315  lower cone (crown race)  25.6 id   $7.00
The Grande crown race is only 25.6 id, and the fork is 25.7.

 

25.4 x 1.06 mm thread

 


Honda PA50 set, 1"-24 thread, 30.0 cups

Honda PA50 headset, 1″-24 thread, 30.0 cups

Honda PA50  25.4 x 1.06 (1.00″- 24.0 tpi), 30.0 cups

The Honda PA50 Hobbit (Camino) is made in Belgium.
It is mostly European in design and components.
3     00000000 chrome cap nut, original              N/A  use bicycle

4     00000000 washer 26x32x1.5                       $3

5     00000000 adjustable cone chrome              N/A  use bicycle
6+9 00000000 frame cup chrome, each 30.0 od $5 2.0 thin wall
7+8 00000000 orig. retainer 14-5/32″ each        $8   
7+8 JB-1909    #73 retainer, 16-5/32″ each        $1.50
10   00000000 lower cone (crown race) 25.7 id N/A
10
This is the original crown race size. It was loose on the fork.
Three samples of Honda PA50 original forks were like this.
The fork steering tube is a straight 25.4mm all the way down.
So there needs to be a 0.15mm hard steel strap under the race.


General headset, 1"-24 thread, 30.0 cups

General headset, 1″-24 thread, 30.0 cups

General            25.4 x 1.06 (1.00″- 24.0 tpi), 30.0 cups

2    1150-5860 chrome cap nut, original             $20  use bicycle
3    1150-5895 stepped notched nut, 31.8 lip      $15
The bottom side of nut #3 has a lip that fits inside #4a.
That’s why the holes in #4 and #4a are big, 32 not 26.
This lip carries the side loads through the nut threads,
instead of the fork top pressing on the threads directly.
1960’s small Honda motorcycles had this design.
4    1150-5894 plain washer 32x44x0.5               $5
4a  3150-5885 fork top plate, 31.8 hole             N/A
4b  1150-5886 spacer tube  26x41x8                  $7
5    1150-5893 adjustable cone chrome             $15
6    1150-5892 upper frame cup chrome 30.0 od $15
7+8 1150-5890 loose balls, 23 – 3/16″ 4.76mm   $2/26
9    1150-5891 lower frame cup chrome 30.0 od $15
10   JB-2742    lower cone (crown race)  27.0 id   $7
Asian mopeds use the Japan Industry Standard (JIS). General, Lazer, Grycner, Clinton, Jui Li, AMS, Tas, Tym, etc.


Tange Levin CDS Headset

Tange Levin CDS sealed precision headset

Bicycle (JIS)  25.4 x 1.06 (1.00″- 24.0 tpi), 30.0 cups

JB-35496  EC30/27 Tange Levin sealed headset $30
0000000   upper frame cone black  30.0 od        N/A
0000000   lower frame cup chrome 30.0 od        N/A
0000000   lower cone (crown race) 27.0 id        N/A
JIS stands for Japan Industry Standards.
JIS crown races are 27.0 id, for a 27.1 fork.
JIS frame cups are 30.0, for a 29.9 frame.

 

Bicycle (ISO)  25.4 x 1.06 (1.00″- 24.0 tpi), 30.2 cups

Headset PartsJB-35495  EC30/26 Tange Levin sealed headset $30
0000000   upper frame cone black  30.2 od        N/A
0000000   lower frame cup chrome 30.2 od        N/A
0000000   lower cone (crown race) 26.35 id      
N/A
ISO stands for International Standards Organization. 
ISO cups are 30.2 mm o.d, for a 30.1 mm i.d frame.
ISO crown races are 26.4 id, for a fork crown 26.5 od.

Nuts and Washers:
A   0000000  thin lock nut, for spacing, 1″-24, oct     $2.00
B   JB-35705  Origin8 black open top nut, 1″-24, oct  $2.00
C   JB-3510    Wald 220 chrome open nut 1″-24, oct  $5.00
D   0000000  keyed thick washer 26x34x3                 $1.00
E   0000000  plain thin washer 26x32x1.5                 $1.50
F   0000000  plain thick washer 26x33x2.5                $2.00


Batavus headset, 1"-24 thread, 30.0 cups

Batavus headset, 1″-24 thread, 30.1 cups

Batavus  25.4 x 1.06 (1.00″- 24.0 tpi), 30.1 cups

Batavus mopeds are made in Holland.
1     47.043.00 partial headset #3-10               N/A
2     46.306.00 plastic plug for nut                     N/A
3     02.059.00 chrome open nut, original     $5-10  use bicycle

4     06.055.00 washer 26x34x1.5                      $3

5     47.043.04 adjustable cone chrome             N/A  use bicycle
6     47.043.03 upper frame cup, zinc 30.1 od  N/A use Peugeot
7+8 47.096.00 orig. retainer 14-5/32″ each       $8   
7+8 JB-1909   #73 retainer, 16-5/32″ each        $1.50
9     47.043.02 lower frame cup, zinc 30.1 od  N/A use Peugeot
10   47.043.01 fork cone (crown race) 26.5 id $12 use bicycle
11   46.117.00 spring strap/sleeve 1.0/0.35      N/A
The fork steering tube is a straight 25.5mm all the way down.
The strap crushes to 0.5 mm, so it adds up, 26.5 = 25.5 + 2*0.5.
The ideal spring strap for Batavus would be 0.5mm.


Trac headset, 1"-24, 30.0 & 30.2

Trac headset, 1″-24, 30.0 and 30.2 cups

Trac          25.4 x 1.06 (1.00″- 24.0 tpi), 30.2 cups

Trac mopeds are made in Korea by Kia and Dae Lim (DMC).
This example is for the early Tracs 1982-85 with M56 engines.
90305-M56-8900 chrome cap nut, orig. hex  N/A use bicycle

90503-M56-8900 washer 26 x 37 x 1            $3

4a 90304-M56-8900 notched thin nut               N/A use octag.
53211-M56-8900 adjustable cone chrome     N/A use bicycle
50301-M56-8900 upper cup chrome 30.2 od  N/A
96211-05000      upper balls, 26- 5/32″ #5  $2/26 or use #73 
96211-05000      lower balls, 26- 5/32″ #5  $2/26 or use #73 
50302-M56-8900 lower cup chrome 30.0 od  N/A
10 53212-M56-8900 cone (crown race) 25.5 id  N/A
This is the original crown race size, but it was loose on the fork.
The fork steering tube is a straight 25.4 mm all the way down.

The looseness had caused a 25.3 mm wear groove on the tube.
To be tight it needs a spring strap and a bigger race, like Batavus.


Cimatti set, 1"-24 thread, 30.2 cups

Cimatti headset, 1″-24 thread, 30.2 cups

Cimatti         25.4 x 1.06 (1.00″- 24.0 tpi), 30.2 cups

Cimatti’s are Italian, and use Italian headset standards.
Cups are 30.2, for a 30.1 frame. Same as bicycle.
3     18-00-51  chrome cap nut, 32 octagon        $20
4     18-01-18  plain washer, 26x30x1.5                $3
4a    xx-xx-xx  spacer tube, 26x29x9                   N/A
5     12-00-65  adjustable cup chrome                $12
6     12-00-62  upper frame cone, zinc   30.2 od    $8
7+8 10-00-39   orig. retainer 14-5/32″ each         $8 
7+8 JB-1909    #73 retainer, 16-5/32″ each         $1.50
9     12-00-63  lower frame cup chrome  30.2 od $20
10   12-00-64  fork cone (crown race)    26.5 id  $12
11
Italian crown race is 26.5 id, for a fork crown 26.6 od.
ISO (International Standards Org.) threads are 1″- 24 tpi.


Garelli headset, 1"-24 thread, 30.2 cups

Garelli headset, 1″-24 thread, 30.2 cups

Garelli          25.4 x 1.06 (1.00″- 24.0 tpi), 30.2 cups

Garelli’s are Italian, and use Italian headset standards.
1  507607.2100 complete original set #3-10       $65
1a    000.0000  set with chrome hexagonal nut   $45
2      206.3067  chrome open nut, 32 octagonal    $6
3      000.3086  chrome cap nut, 32 octagonal    $20
4      000.3085  plain washer, 26x30x1.5              $3
5      207.3078  adjustable cup chrome              $12
6      000.3062  upper frame cone zinc   30.2 od  $8
7+8  10-00-39  orig. retainer 14-5/32″ each         $8 
7+8  JB-1909   #73 retainer, 16-5/32″ each         $1.50
9      201.3064  lower frame cup chrome 30.2 od $20
10    000.3065  lower cone (crown race) 26.5 id  $12
One German-made moped, Kynast, uses this headset,
because Kynast (Flying Dutchman) has an Italian fork.


Vespa Ciao set, 1"- 24 thread, 30.2 cups

Vespa Ciao or Bravo, 1″- 24 tpi, 30.2 cups

Vespa Ciao/Bravo  25.4 x 1.06 (1″- 24 tpi), 30.2 cups

Vespa mopeds are made in Italy by Piaggio.
1       135977 partial original set #5-10              $25
3a     145608  chrome cap nut, 32 oct (Bravo)    $20
3       137609  chrome open nut, 32 oct (Ciao)    $18 use bicycle
4a     145607  locking plate, 32 octagon (Bravo)  N/A
5       136258  adjustable cup chrome decagon    $12
6       123315  upper frame cone zinc   30.2 od    $8
7+8 10-00-39  orig. retainer 14-5/32″ each         $8 
7+8 JB-1909   #73 retainer, 16-5/32″ each         $1.50
9       123316  lower frame cup chrome  30.2 od  $12
10     123317  lower cone (crown race)  26.5 id  $10
11   Vespa uses Italian headset standards, 26.5 and 30.2.
12


Schwinn set, 1"- 24 thread, 32.5 cups 1960's rechromed

Schwinn headset
1″- 24, 32.5 cups
1960’s re-chromed

1968 Schwinn Stingray equipped for BMX

1968 Schwinn
BMX equipped

Bicycle, Schwinn 25.4 x 1.06 (1″- 24 tpi), 32.5 cups

In the 50’s – 60’s USA this was a Schwinn-only head set size.In the late 1960’s BMX (bicycle moto cross) began. The first BMX bikes were 20″ kids bikes with off road tires, MX handlebars and seat. The Schwinn Stingray was preferred, because of it’s heavy duty construction and high quality. In the 70’s BMX equipment became Schwinn-compatible, including frames with 32.5 mm headset cups. BMX became very popular, as did the headset. In the 80’s it became the mountain bike (ATB) standard. In the 1990’s bigger 1-1/8″ steering tubes came out on high-end ATB’s, with 34.0 frame cups. Soon 34mm frames became the new ATB standard. Then bigger 1-1/4″ steering tubes and 37mm frames followed. Now this historic headset is almost obsolete.

BMX Headset, 1"-24 thread, 32.5 cups

BMX Headset, 1″-24 thread, 32.5 cups

This is a 1980’s-90’s BMX or ATB headset, 32.5 cups.
The cups fit Puch Magnum, Tomos and Sears Free Spirit.
1   JB-35334-0  EC32/26 Sunlite chrome headset $10
3   JB-35334-3  Sunlite chrome open nut, 32 hex   $5
4   JB-35334-4  keyed washer 26x34x1.5              $1
5   JB-35334-5  adjustable cone chrome               $3
6   JB-35334-6  upper frame cup chrome 32.5 od  $4
7   JB-35334-7  special retainer, 16-5/32″ each     $3
8   JB-35334-7  special retainer, 16-5/32″ each     $3
For 50 years these had #65 retainers, with 3/16″ balls.
9   JB-35334-9  lower frame cup chrome 32.5 od   $6
10 JB-35334-1  lower cone (crown race)  26.4 id   $8
The fit, roundness and finish are surprisingly good.

 


AMF headset, 1″-24 thread, 33.6 cups

Bicycle, American 25.4 x 1.06 (1″- 24.0 tpi), 33.6 cups

1      MP-0014    AMF original headset #3-10        $40
1a   JB-3512       Wald 4080 headset 3a-10 below $15

3     MP-0014-1  chrome AMF open nut, hex         $18
3a   JB-3510       Wald #220 chrome nut, 32 oct     $5
4     MP-0014-1a tab/lock washer                        $2
4a   JB-3503       1 inch keyed washer                  $1
5     MP-0014-2   adjustable cone, zinc                $8
6+9  MP-0014-4  frame cup zinc, each  33.6 od   $15
6a+9a JB-3513    Wald #410 cup, each 33/34 od  $6
7+8  MP-0014-3  #52 retainer 15 – 3/16″, each     $5
10    MP-0014-5  lower cone (crown race) 25.7 id  $7
10a  JB-35345     lower cone (crown race) 26.4 id  $8

Wald headset, 1"-24, 30/33 cups

Wald headset, 1″-24, 32.9/34.3 cups

This standard is on AMF, Colombia mopeds and bicycles.
Also traditional American bicycles, Murray, Huffy, etc.
Wald 4080 headset is for traditional or vintage American.
The Wald 410 replacement frame cups have 3 “bumps”.
The diameter is 32.9 mm, but 34.3 mm at the bumps.
Grind them down to fit any frame from 32.8 to 34.2 mm.

Colombia Fork Crown Race

American Crown Race: Unlike other fork crowns that have a small step at the base of the steering tube, American type bicycles have a smooth flare. The race #10 only touches at the top of the flare, and at the bottom floor of the fork. You can see in the right photo the crown race is cone shaped inside. All other crown races are cylindrical shaped inside. 

If an American type conical crown race is not available, then a 26.4 mm id standard crown race will substitute (at least it did on this fork), thanks to the bottom having enough straight section that is 26.5 mm outer diameter. It sounds crazy that a 26.4 race will substitute for a 25.5 one. That is why this explanation and pictures are needed here.

 

 

 

26.0 x 1.00 mm thread

 


Puch Maxi set, 26 -1.0 thread, 30.8 cups

Puch Maxi   26.0 x 1.00 (1.02″- 25.4 tpi), 30.8 cups

The Puch Maxi headset is the same as Sachs (Hercules).
1   0000000000 partial headset #5-10    see treatland.tv
2   3491300181 chrome open nut                     $7-$15
3   3491305181 chrome cap nut                      $8-$20
4   0009013935 plain washer 26x32x2              
$3
5   6001330071 adjustable cone chrome            $3-$5
6+9 6002330051 frame cup, zinc each  30.8 od N/A  2.0 thin wall
7+8 0003298    orig. retainer 14-5/32″ each      $8 
7+8 JB-1909    #73 retainer, 16-5/32″ each      $1.50
10 6002330061 lower cone (crown race) 26.7 id $5-$8
11 3491300151 spring strap/sleeve 1.0/0.35 mm  N/A
Installed, the sleeve becomes 0.35 mm. So 26.7 = 26.0 + 2*0.35
These sizes are the traditional Austrian bicycle headset standard.
The 1984-86 Puch Cobra, was a “Magnum”, but it had this Maxi headset.


Sachs headset, 26-1.0 thread, 30.8 cups

Sachs/Hercules  26.0 x 1.00 (1.02″- 25.4 tpi), 30.8 cups

The Sachs headset is the same as a Puch Maxi headset.
1   5041009701 partial headset #5-10    see treatland.tv
2   9271013516 chrome open nut                     N/A  use Puch Maxi
3   9271013519 chrome cap nut                      N/A  use Puch Maxi
4   9279920817 plain washer 27x37x1.25        N/A

4a 9279919606  spacer ring 27x32x6           N/A
5   000000000 adjustable cone chrome          N/A  use Puch Maxi
6+9 00000000   frame cup, zinc each  30.8 od N/A  2.0 thin wall
7+8 00000000   orig. retainer 14-5/32″ each      $8 
7+8 JB-1909    #73 retainer, 16-5/32″ each      $1.50
10 000000000 lower cone (crown race) 26.7 id $5-$8
11 9219769501 spring strap/sleeve 1.0/0.35 thick N/A
Installed, the sleeve becomes 0.35 mm. So 26.7 = 26.0 + 2*0.35
These sizes are the traditional Austrian bicycle headset standard.


Sparta, KTM 26x1.0 32.0 cups

Sparta, KTM,  26-1.0 thread, 32.0 cups

Sparta/KTM   26.0 x 1.00 (1.02″- 25.4 tpi), 32.0 cups

1     00000000  complete headset #3-10            $35
2     335.01.01  chrome cap nut (Kreidler & KTM)  $10-$18
3     00000000  chrome cap-lug nut (for Sparta) $10-$20
This nut bottom is cone shaped, for centering, like a lug nut.
4     235.01.10  plain washer (for Kreidler & KTM)  $2
5     00000000  adjustable cup, bright zinc          $5-$8
6     235.01.02  adjustable cup chrome (Kreidler) $15
6     00000000  upper frame cone, zinc   32.0 od  $5-$8
7+8 JB-1908    #65 retainer, 15 – 3/16″ each      $2
7+8 00.69.27    22 – 3/16″ balls (Kreidler) each    $2/26
9     00000000  lower frame cup zinc    32.0 od   $5-$8
10   00000000  lower cone (crown race) 26.7 id  $5-$8
New crown races range from 26.65 to 26.74 mm id.


Puch Magnum set, 26-1.0 thread, 32.6 cups

Puch Magnum set, 26-1.0 thread, 32.6 cups

Puch Magnum   26.0 x 1.00 (1.02″- 25.4 tpi), 32.6 cups

Puch Magnum MkII, Sears Free Spirit 8084, 8085, 8086 silver:
3a 3211308181 chrome cap nut (zinc on Sears)  N/A
4b 3211308191 washer 29x35x.75             N/A  above plate
4a 3211308511 spacer 26x32x13.5             $8  below plate
Magnum XK, Sears Free Spirit 8080 blue, 8081,8082,8083 red:
3   3491305181 chrome cap nut                 $8-$20
4        9013935  washer 26x32x2.5              $3 below plate
All Puch Magnums (except Cobra) and Sears Free Spirits:
5   3211307081 adjustable cone zinc 51 od    $15-$20
6+9  25221  frame cup, zinc, each  32.6 od    $25  3.3 thick wall
7+8  25226  loose balls 5mm qty 21 each        $5/21 or use 3/16
10    25220  lower cone (crown race) 26.7 id   $5-$8
11    00000  early Schwinn cup, chrome 32.5  $12  2.0 thin wall
12    02016  Sears Free Spirit cup, zinc  32.6   $15  2.8 thick wall
13    00000  Schwinn/BMX cup, chrome 32.7   $20  2.6 thick wall


Tomos A3 and A35, 26-1.0 thread, 32.6 cups

Tomos 1975-2006  26.0 x 1.0 (1.02″-25.4 tpi) 32.6 cups

Tomos made Puchs, under license, from 1955 to 1974. 
That is why the steering parts also fit Puch Magnum.
3        200718  chrome open nut 32 hex           $8-$12
3a      219349  chrome cap nut 32 hex             $8-$15
4        206701  plain washer 26x36x1.5            $3
5a      200717  notched adjustment nut            $5
5b      200715  dust shield 26x47x9mm             $5
5c      200714  upper cone, no threads 26.0 id   $8
6       200558  upper frame cup, zinc  32.6 od $15  2.6 thick wall
7       044535  upper balls 5mm qty 21            $5
8       044535  lower balls 5mm qty 21            $5
9       200471  lower frame cup, zinc   32.6 od $20  2.6 thick wall
10     200714  lower cone (crown race)  26.0 id $8
11
The 1987-06 Tomos fork has M26-1.0 rolled threads 25.8 od, then smooth 25.1 od, flaring to 26.1 at arrow.
The 1975-86 Tomos fork has M26-1.0  cut  threads 25.8 od, then smooth 26.0 od, flaring to 26.1 at arrow.


Tomos A55 headset, 26-1.0 thread, 32.5 cups

Tomos 2007-2013  26.0 x 1.0 (1.02″-25.4 tpi) 32.5 cups

1        230741  partial headset #4-11               $40
The 2007-12 Parts Catalogs only have the older fork items.
So the 07-on EBR fork items, 10 and 11, are not available.
3       219349  chrome cap nut 32 hex               $8-$15
4       222848  chrome washer 26x36x2             $3
5a     200717  notched adjustment nut              $5
5b     200715  dust shield 26x47x9mm                $5
5c     200714  upper cone, no threads  26.0 id    $8
6      223155  upper frame cup, zinc   32.5 od   $15  2.6 thick wall
7      044535  upper balls 5mm qty 21               $5
8      044535  lower balls 5mm qty 21               $5
9      223157  lower frame cup, zinc   32.5 od   $18  2.6 thick wall
10     00000  lower cone (crown race)  27.4 id  N/A use 26.7-27.0
11     00000  spring strap/sleeve 1.0/0.4 thick   $10 for 27.4 race
The strap crushes down from 1.0 to 0.7 when installed.
So 27.4 = 26.0 + 2*0.7. Ideal strap is 0.7mm thick.

The 2007-13 Tomos fork has M26-1.0 cut threads 25.8 od, then smooth 26.0 od, with no flare.
Instead of a flare or step, it has a #11 spring strap, the same one that a Puch Maxi has.

 

 

28.0 x 1.00 mm thread

 


Vespa Si          28.0 x 1.00 (1.10″- 25.4 tpi)  41.2 cups

This futuristic early 1980’s moped has a bigger steering tube and bearings.
This size was also for an old French tandem, according to http://sheldonbrown.com/cribsheet-headsets.html

3      212152  chrome cap nut 36 oct               $20
4      000000
5      000000
6      000000  upper frame cup, zinc   41.2 od   $15  4.0 thick wall
7      000000  upper balls
8      000000  lower balls
9      000000  lower frame cup, zinc    41.2 od   N/A  4.0 thick wall
10     000000  lower cone (crown race)

 

28.6 x 0.98 mm thread

 


Bicycle (1-1/8″)  28.6 x 0.98 (1.125″- 26 tpi)  34.0 cups

EC34/30. This (1.125″) was the first oversize for 1990’s mountain bikes (ATB), 34.0 cups, 30.0 crown race.

 

 

31.8 x 0.98 thread

 


Bicycle (1-1/4″)  31.8 x 0.98 (1.25″- 26 tpi)  37.0 cups

EC37/33. This (1.25 inch) is the biggest external cup (EC) threaded bicycle headset, 37.0 cups, 33.0 crown race.