Bearing and Seal Chart

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Sizes are given in millimeters.

Some general info on ball bearing nomenclature (go to the 3rd page). Nomenclature (and part #s) may differ slightly between manufacturers/vendors: Action Bearing Nomenclature

Also general technical info on bearings (types, failure modes, etc.): Bearing Tech Info

How ball bearings are made! How ball bearings are made VIDEO!


Puch E50

Bearing

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
6203 C3 17 40 12 Left Crankshaft, Main Gear 3 C3 clearance
6203 NR 17 40 12 Right crankshaft 1 External Snap ring

Seal

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
Double lip 17 40 7 Crankshaft Seals 2
Double lip 22 40 7 Output shaft seal 1

Puch ZA50

Bearing

ID Inner Diameter Outer Diameter Width Usage
L17 (FAG) 17 40 10 ZA50 magneto side crank bearings
E20 (FAG) 20 47 12 ZA50 transmission side crank bearing
6002 (ISO) 15 32 9 ZA50 transmission cover crank side
16101 (ISO) 12 30 8 ZA50 transmission cover intermediate side - oil injected
16100 (ISO) 10 28 8 ZA50 transmission cover intermediate side - non oil injected
6005 (ISO) 25 47 12 ZA50 intermediate shaft main
6203 (ISO) 17 40 12 ZA50 output shaft main
HK 1816 (FAG) 18 24 16 ZA50 output shaft roller
HK 1612 (FAG) 16 22 12 ZA50 second speed gear internals

Seal

ID Inner Diameter Outer Diameter Width Usage
17 35 7 ZA50 magneto side crank seal
20 35 7 ZA50 transmission side crank seal
25 35 7 ZA50 Output shaft seal

ISO FAG


Sachs 50x

Bearing

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
6202 15 35 11 Left Crankshaft, Main Gear 1
6202 15 35 11 Right crankshaft 1

Seal

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
15 30 5,5 Clutch side crank seal 1
15 35 7 Magneto side crank seal 1
15 32 5,5 Output shaft seal 1


Tomos A3

Bearing

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
L17a 17 40 10 Crankshaft Bearing 2 Early Style
6203 C3 17 40 12 Crankshaft Bearing 2 Late Style
6000 10 26 8 Side-cover Bearing 2 Outer Crank and Gear shaft support
6201 12 32 10 Transmision bearing 1 Inner gear shaft support
6006 30 55 13 Mainshaft Bearing 1
SCE 109P 5/8th inch 13/16th inch 9/16th inch Mainshaft roller 1 Has seal on 1 end
SCE 108 5/8th inch 13/16th inch 1/2 inch Mainshaft roller 1
RC081208 13 19 12.5 Clutch one-way needle bearing 1 Treats, mopedjunkyard, and Myrons have it

Seal

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
Lipped seal 17 35 8 Crankshaft seals 2
Lipped Seal (metal lined?) 16 24 7 Right cover pedal shaft 1

Tomos A35/A55

Bearing

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
6203 C3 17 40 12 Crank main bearings 2 C3 clearance
Needle Roller 12 15 15 Small end connecting rod 1
One way needle bearing Clutch Bell 1
608 8 22 7 Trans Cover Crank support 1
6000 10 26 8 Trans cover Counter shaft support 1
6201 12 32 10 Left Counter shaft support 1
Roller d5 8 Counter shaft gear 1
SCE 109P Driveshaft bearing 1 Needle roller
SCE 108 Driveshaft bearing 1 Needle roller
6006 30 55 13 Driveshaft bearing 1

Seal

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
Lipped seal 17 35 7 Crankshaft seals 2
Lipped seal 35 47 7 Output shaft seal 1
Lipped seal 16 24 7 Transmission cover pedal shaft seal 1

Motobecane AV7/AV10

Bearing

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
533526 TNH 16 42 13 Crankshaft bearings 2 Special tapered ID
15 19 22 Clutch bearing 1
Variator balls 3 or 4 17/32" or 13,49mm
HK1612 16 22 12 Pulley bearings 2
Steering bearings 50 5/32" or 3,96mm

Seal

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
SC 15x21x4 15 21 4 Crankshaft Seals 2

Peugeot 103

Bearing

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
6203 TN9/C3 17 40 12 Unsealed - Magneto Side 1 TN9/C3
6204 TN9/C3 20 47 14 Unsealed - Variator Side 1 TN9/C3

Seal

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
Lipped Seal 16 30 4.5 Magneto Side 1
Lipped Seal 20 30 4.5 Variator Side 1

Batavus M48

Bearing

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
6302 15 42 13 Magneto side crank bearing 1
6302 15 42 13 Transmission side crank bearing 1

Seal

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
30 15 7 Magneto side crank seal 1
42 20 7 Clutch side crank seal 1

Batavus M56

Bearing

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
6202 15 35 11 Magneto side crank bearing 1
6202 15 35 11 Transmission side crank bearing 1

Seal

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
8273 Magneto side crank bearing
6430 Transmission side crank bearing

ISO FAG

Sachs 50x

Bearing

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
6202 15 35 11 Left Crankshaft, Main Gear 1
6202 15 35 11 Right crankshaft 1

Seal

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
15 30 5,5 Clutch side crank seal 1
15 35 7 Magneto side crank seal 1
15 32 5,5 Output shaft seal 1


Honda PAI / PAII

Bearing

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
6004 C3 20 42 12 Crank bearings 2

Seal

ID Inner Diameter Outer Diameter Width Usage Quantity Notes
15 25.5 7 Crankshaft Seals 2 This is for stock crank. Aftermarket typically uses one 17 x 25.5 x 7 and one 15 x 25.5 x 7 seal.


ISO
FAG