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Crankshaft

(127 products)
Moped Crankshafts Bearings and Oil Seals Small End Bearings Crankshaft Accessories
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127
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Product type
Bearing Connecting rod Crankcase accessories Crankshaft Crankshaft accessories Crankshaft bearing Needle bearing Oil seal Wheel bearing Woodruff key Nut O-ring Oil pump gear
Brand
2Fast Airsal Athena Doppler Jasil Malossi MotoForce MVT Naraku Polini RMS Schmitt SKF Stage6 Stage6 R/T Standard Parts Swiing Tomos
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Stage6
Small End Bearing HQ Stage6
Article no.: S6-8020_SIZES
198

Small End Bearing HQ Stage6

from 6,00 €
In stock
13,00 €
-54% Discount
Stage6
Crankshaft Stage6 MBK 51
Article no.: S6-8013000

Crankshaft Stage6 MBK 51

117,00 €
In stock
RRP
143,00 €
-18% Discount
Sale
Stage6
Oil Seals crankshaft Stage6 NBR Peugeot 103
Article no.: S6-8041320

Oil Seals crankshaft Stage6 NBR Peugeot 103

4,90 €
In stock
Stage6
Crankshaft Bearing Set Stage6 C3 polymer cage Peugeot 103
Article no.: S6-80332C3/TN9
1

Crankshaft Bearing Set Stage6 C3 polymer cage Peugeot 103

24,50 €
In stock
RRP
27,00 €
-9% Discount
Stage6
Crankshaft Bearing Set Stage6 C3 steel cage Peugeot 103
Article no.: S6-80332C3/MET

Crankshaft Bearing Set Stage6 C3 steel cage Peugeot 103

17,00 €
In stock
RRP
22,00 €
-23% Discount
Sale
Stage6
Crankshaft Stage6 HPC Peugeot 103 SPX / RCX
Article no.: S6-8017401

Crankshaft Stage6 HPC Peugeot 103 SPX / RCX

129,00 €
In stock
RRP
143,00 €
-10% Discount
MotoForce
Oil Seal crankshaft 15x21x4.5mm MBK 51
Article no.: MF96.00060

Oil Seal crankshaft 15x21x4.5mm MBK 51

1,50 €
In stock
RRP
1,70 €
-12% Discount
MotoForce
Woodruff Key ignition Peugeot
Article no.: MF60.17518
2

Woodruff Key ignition Peugeot

3,20 €
In stock
RRP
3,70 €
-14% Discount
MotoForce
Small End Bearing Motoforce
Article no.: MF33000_MF_AGUILLES
125

Small End Bearing Motoforce

from 2,40 €
In stock
6,60 €
-64% Discount
MotoForce
Crankshaft OEM quality 10mm MotoForce Piaggio Ciao
Article no.: MF30.10002

Crankshaft OEM quality 10mm MotoForce Piaggio Ciao

44,50 €
In stock
MotoForce
Crankshaft Bearing Set Peugeot 103
Article no.: MF33.13201

Crankshaft Bearing Set Peugeot 103

15,50 €
In stock
Polini
Small end bearing Polini
Article no.: P280.00_SMALLENDBEARING
128

Small end bearing Polini

from 8,40 €
In stock
Standard Parts
Crankshaft Nut moped
Article no.: CGN487178

Crankshaft Nut moped

1,10 €
In stock
1,30 €
-15% Discount
Polini
Small End Bearing Polini 14x17x17mm
Article no.: P280.0077

Small End Bearing Polini 14x17x17mm

24,00 €
In stock
RRP
34,00 €
-29% Discount
Sale
Malossi
Small End Bearing Malossi MBK 51 13x16x14mm
Article no.: M663276B
1

Small End Bearing Malossi MBK 51 13x16x14mm

16,00 €
In stock
Standard Parts
Woodruff Key 2x3.7mm Simson S51
Article no.: MOF-41336

Woodruff Key 2x3.7mm Simson S51

0,90 €
In stock
MVT
Oil Seal crankshaft MVT G2 / G3 / G4
Article no.: MVT-SPIG234

Oil Seal crankshaft MVT G2 / G3 / G4

8,40 €
In stock
RRP
9,90 €
-15% Discount
Doppler
Crankshaft Oil Seals Doppler FKM MBK 51
Article no.: CGN516947

Crankshaft Oil Seals Doppler FKM MBK 51

7,90 €
In stock
9,70 €
-19% Discount
Standard Parts
Crankshaft Oil Seal nitrile Peugeot 103 Fox
Article no.: CGN526222

Crankshaft Oil Seal nitrile Peugeot 103 Fox

4,80 €
In stock
Naraku
Oil Seal Naraku FKM Premium 24x43x6mm
Article no.: NK103.96

Oil Seal Naraku FKM Premium 24x43x6mm

4,80 €
In stock
Naraku
Oil Seal Naraku FKM Premium 22x38x6mm
Article no.: NK103.91

Oil Seal Naraku FKM Premium 22x38x6mm

5,40 €
In stock
Standard Parts
Support Plate for crankcase oil seal Peugeot 103
Article no.: L-SP163932

Support Plate for crankcase oil seal Peugeot 103

4,10 €
In stock
Standard Parts
Crankshaft Bearings and Oil Seals Tomos A35
Article no.: MF33.13900

Crankshaft Bearings and Oil Seals Tomos A35

12,00 €
In stock
Sale
SKF
Bearing SKF 6203 C3 TN9 17x40x12mm polymer cage
Article no.: SKF6203TN9/C3

Bearing SKF 6203 C3 TN9 17x40x12mm polymer cage

9,30 €
In stock
Standard Parts
Crankshaft Oil Thrower Spacer Disc 39x47x1mm Simson
Article no.: MOF-41513

Crankshaft Oil Thrower Spacer Disc 39x47x1mm Simson

0,80 €
In stock
RRP
2,20 €
-64% Discount
Standard Parts
Crankshaft Oil Thrower Spacer Disc 39x47x0.2mm Simson
Article no.: MOF-41457

Crankshaft Oil Thrower Spacer Disc 39x47x0.2mm Simson

0,80 €
In stock
RRP
2,00 €
-60% Discount
Standard Parts
Crankshaft Oil Thrower Spacer Disc 39x47x0.3mm Simson
Article no.: MOF-41374

Crankshaft Oil Thrower Spacer Disc 39x47x0.3mm Simson

0,80 €
In stock
RRP
2,00 €
-60% Discount
Standard Parts
Crankshaft Bearing E20 brass cage Puch Maxi 20x47x12mm (x1)
Article no.: LAG.E20

Crankshaft Bearing E20 brass cage Puch Maxi 20x47x12mm (x1)

15,00 €
In stock
RRP
24,00 €
-38% Discount
2Fast
Connecting Rod 2Fast 95mm crankpin 18x41mm
Article no.: TFAST065-ET01

Connecting Rod 2Fast 95mm crankpin 18x41mm

209,00 €
In stock
Polini
Crankshaft Polini Evolution 12mm piston pin Piaggio Ciao
Article no.: P210.0074

Crankshaft Polini Evolution 12mm piston pin Piaggio Ciao

238,00 €
In stock
RRP
268,00 €
-11% Discount
Doppler
Small End Bearing Doppler reinforced 13x16x14 MBK 51
Article no.: CGN461981

Small End Bearing Doppler reinforced 13x16x14 MBK 51

8,00 €
In stock
RRP
10,00 €
-20% Discount
Sale
Doppler
Crankshaft Doppler Endurance Peugeot 103 SP / MV (electronic)
Article no.: CGN441283
3

Crankshaft Doppler Endurance Peugeot 103 SP / MV (electronic)

135,00 €
In stock
Malossi
Small End Bearing Malossi MHR
Article no.: Malossi-Aguilles-renforcee
56

Small End Bearing Malossi MHR

from 8,70 €
In stock
Athena
Crankshaft Athena Racing pin 12mm Piaggio Ciao
Article no.: AT-S410480320002

Crankshaft Athena Racing pin 12mm Piaggio Ciao

103,00 €
In stock
Sale
MVT
Crankshaft för MVT G4 case stroke 43mm
Article no.: MVT-VI42

Crankshaft för MVT G4 case stroke 43mm

183,00 €
In stock
RRP
216,00 €
-15% Discount
Malossi
Crankshaft Malossi RHQ Piaggio Ciao pin 10mm - stroke 43mm
Article no.: M5319440

Crankshaft Malossi RHQ Piaggio Ciao pin 10mm - stroke 43mm

235,00 €
In stock
RRP
300,00 €
-22% Discount
Sale
Malossi
Crankshaft Malossi axle 12mm Piaggio Ciao
Article no.: M531802

Crankshaft Malossi axle 12mm Piaggio Ciao

251,00 €
In stock
RRP
310,00 €
-19% Discount
Doppler
Small End Bearing Doppler reinforced 13x16x14mm MBK 51
Article no.: CGN324244

Small End Bearing Doppler reinforced 13x16x14mm MBK 51

10,00 €
In stock
Doppler
Crankshaft Doppler ER1 Peugeot 103 SP / MV (electronic)
Article no.: CGN263966
3

Crankshaft Doppler ER1 Peugeot 103 SP / MV (electronic)

94,00 €
In stock
RRP
104,00 €
-10% Discount
Sale
Doppler
Crankshaft Doppler ER1 Peugeot 103 SP / MV (breaker points)
Article no.: CGN263951
2

Crankshaft Doppler ER1 Peugeot 103 SP / MV (breaker points)

104,00 €
In stock
Airsal
Crankshaft Airsal Racing Peugeot 103 SP (big cone)
Article no.: C31020940

Crankshaft Airsal Racing Peugeot 103 SP (big cone)

38,00 €
In stock
Doppler
Small End Bearing Doppler 12x16x15
Article no.: CGN461989

Small End Bearing Doppler 12x16x15

10,00 €
In stock
Standard Parts
Small End Bearing Peugeot 103 12x15x16.5mm
Article no.: CGN676

Small End Bearing Peugeot 103 12x15x16.5mm

5,60 €
In stock
Standard Parts
Crankshaft Oil Seal 15x24x5mm Piaggio Ciao PX (x1)
Article no.: CGN3268

Crankshaft Oil Seal 15x24x5mm Piaggio Ciao PX (x1)

4,70 €
In stock
RMS
Crankshaft RMS 12mm piston pin Piaggio Ciao
Article no.: R100010220

Crankshaft RMS 12mm piston pin Piaggio Ciao

92,00 €
In stock
Jasil
Crankshaft Top Racing Sachs / Hercules 3-speed
Article no.: JA6030056

Crankshaft Top Racing Sachs / Hercules 3-speed

49,50 €
In stock
RRP
120,00 €
-59% Discount
Airsal
Crankshaft Airsal Peugeot 103 SP / MVL (contact ignition)
Article no.: C31020640

Crankshaft Airsal Peugeot 103 SP / MVL (contact ignition)

36,00 €
In stock
Stage6
O-Ring oil filler cap Stage6 Piaggio
Article no.: S6-SSP141ET01

O-Ring oil filler cap Stage6 Piaggio

0,90 €
Ready for dispatch shortly
1,20 €
-25% Discount
Stage6
Crankshaft Stage6 HPC Peugeot 103 SP (electronic)
Article no.: S6-8017400
6

Crankshaft Stage6 HPC Peugeot 103 SP (electronic)

129,00 €
In stock soon
RRP
143,00 €
-10% Discount
MotoForce
Oil Seal crankshaft Peugeot 103
Article no.: MF96.00029

Oil Seal crankshaft Peugeot 103

2,90 €
In stock soon
Standard Parts
Woodruff Key ignition 3 x 3.7mm Minarelli AM6
Article no.: MF60.10001

Woodruff Key ignition 3 x 3.7mm Minarelli AM6

1,60 €
In stock soon
1,80 €
-11% Discount
Doppler
Crankshaft Oil Seals Doppler FKM Peugeot 103
Article no.: CGN516945

Crankshaft Oil Seals Doppler FKM Peugeot 103

7,90 €
In stock soon
10,00 €
-21% Discount
MVT
Crankshaft MVT G1 S-Race MBK 51
Article no.: MVT-VI34

Crankshaft MVT G1 S-Race MBK 51

141,00 €
In stock soon
RRP
167,00 €
-16% Discount
Standard Parts
Crankshaft OEM quality MBK 51 electric
Article no.: MF30.13006

Crankshaft OEM quality MBK 51 electric

58,00 €
In stock soon
Standard Parts
Crankshaft reinforced Peugeot Fox
Article no.: CGN440111
1

Crankshaft reinforced Peugeot Fox

117,00 €
In stock soon
Standard Parts
Crankshaft 12mm piston pin Piaggio Ciao
Article no.: MOF-43922

Crankshaft 12mm piston pin Piaggio Ciao

54,00 €
In stock soon
Polini
Small End Bearing Polini Big Evolution 13x17x17,3mm Piaggio / Minarelli
Article no.: P280.0057

Small End Bearing Polini Big Evolution 13x17x17,3mm Piaggio / Minarelli

27,00 €
Currently not in stock
Malossi
Crankshaft Bearings Malossi Piaggio Ciao / Bravo
Article no.: M664678E

Crankshaft Bearings Malossi Piaggio Ciao / Bravo

22,00 €
Currently not in stock
RMS
Bearing SKF 6203-C5 TN9 - 17x40x12mm Vespa Primavera
Article no.: R100200080

Bearing SKF 6203-C5 TN9 - 17x40x12mm Vespa Primavera

8,90 €
Currently not in stock
Polini
Crankshaft Bearing Set Polini Original MBK 51
Article no.: P282.0210

Crankshaft Bearing Set Polini Original MBK 51

25,50 €
Currently not in stock
RRP
30,00 €
-15% Discount
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123

Moped Crankshafts: Reliability and Performance

The cranktrain primarily refers to the crankshaft, crankshaft bearings, and oil seals. In our online shop, this category also includes small end bearings (piston pin bearings) as well as matching spare parts and accessories.

The crankshaft and its components require special attention, both in terms of performance and reliability.

All components are available for the most popular models (Piaggio Ciao, Peugeot 103, Puch and Simson mopeds, etc.).

Crankshaft

The crankshaft is the central component of the cranktrain. It must always match the cylinder: the more powerful the cylinder, the more robust the crankshaft should be. Depending on the setup, it is also important to ensure that the stroke and connecting rod length are compatible, as engine tuning is precision work.

To make selection easier, we have divided cylinders and crankshafts into performance levels: Original, Sport, Racing, and High-End.

We offer crankshafts from renowned brands such as Stage6, Stage6 R/T, Airsal, Malossi, Polini, MVT, Doppler, and many others.

Crankshaft Bearings and Oil Seals

Even in stock engines, it is usually not the crankshaft itself that wears out, but rather the bearings and oil seals. These should be replaced regularly, even on original setups.

For tuned engines, reinforced bearings are explicitly recommended.

Our range includes brands such as Stage6 R/T, SKF, Polini, and Motoforce.

small end Bearings and Accessories

The small end bearing (needle bearing) is usually replaced together with the piston. However, since it sits on the connecting rod and its size also depends on it, it is classified under crankshaft accessories in our shop.

Warning: Be sure to check for the correct size! Some cylinder kits use larger piston pins than the original.

Accessories include replacement connecting rods, woodruff keys, shims, and other specific components.

FAQ – Frequently Asked Questions about Crankshafts

→ Do I need to replace the crankshaft when increasing displacement? Yes. The original crankshaft is generally not designed for the higher torque and increased RPM and should be replaced with a reinforced or racing version.

→ Can I replace the crankshaft myself? This is a demanding task that requires special tools. Without experience, it is recommended to leave this task to a professional to avoid damage. If you want to do it yourself, follow the workshop manual closely or use appropriate guides.
Note: The same special tools are required for changing bearings and oil seals.

→ How do I recognize worn bearings? Strong, unusual vibrations throughout the vehicle are a typical sign. Often, a grinding or rumbling noise can be heard while the engine is running.

→ How do I recognize defective oil seals? Leaking oil seals allow false air into the engine, leading to a lean mixture. Typical symptoms include unstable idling, poor engine performance, and a light / whitish spark plug.

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