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Crankshaft

(125 Produkte)
Mofa Crankshafts Bearings and Oil Seals Small End Bearings Crankshaft Accessories
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Product type
Bearing open Connecting rod kit Crankshaft Crankshaft accessories Crankshaft bearing kit Engine case accessories Needle bearing Oil seal Wheel bearing set Woodruff key Nut 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 Top Performances
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Doppler
Crankshaft Doppler ER1 Peugeot 103 SPX / RCX
Artikel-Nr.: CGN263977

Crankshaft Doppler ER1 Peugeot 103 SPX / RCX

104,00 €
In stock
109,00 €
-5% Discount
Top Performances
Small End Bearing Top Performances 12x15x15mm
Artikel-Nr.: T9921330

Small End Bearing Top Performances 12x15x15mm

5,00 €
In stock
6,00 €
-17% Discount
Sale
Jasil
Crankshaft Top Racing reinforced Zündapp 2- / 3- / 4-speed
Artikel-Nr.: JA6030071

Crankshaft Top Racing reinforced Zündapp 2- / 3- / 4-speed

104,00 €
In stock
116,00 €
-10% Discount
Sale
Standard Parts
Crankshaft Rito (old model) Puch Maxi E50
Artikel-Nr.: MOF-44163

Crankshaft Rito (old model) Puch Maxi E50

159,00 €
In stock
Jasil
Crankshaft Top Racing full circle (new model) Puch Maxi E50 engine
Artikel-Nr.: JA6031027

Crankshaft Top Racing full circle (new model) Puch Maxi E50 engine

95,00 €
In stock
Sale
Swiing
Crankshaft swiing High-End (+1 mm stroke) Puch Maxi E50
Artikel-Nr.: MOF-43852

Crankshaft swiing High-End (+1 mm stroke) Puch Maxi E50

177,00 €
In stock
Doppler
Crankshaft Doppler ER1 MBK 51 (left-hand thread)
Artikel-Nr.: CGN511565

Crankshaft Doppler ER1 MBK 51 (left-hand thread)

104,00 €
In stock
105,00 €
-1% Discount
Airsal
Crankshaft Airsal Racing Peugeot 103 SP (big cone)
Artikel-Nr.: C31020940

Crankshaft Airsal Racing Peugeot 103 SP (big cone)

29,00 €
In stock
Sale
Doppler
Small End Bearing Doppler 12x16x15
Artikel-Nr.: CGN461989

Small End Bearing Doppler 12x16x15

10,00 €
In stock
SKF
Crankshaft Bearings + Oil Seals C4 steel cage Peugeot Fox
Artikel-Nr.: SKF167718

Crankshaft Bearings + Oil Seals C4 steel cage Peugeot Fox

23,50 €
In stock
Standard Parts
Crankshaft OEM quality MBK 51 electric
Artikel-Nr.: MF30.13006

Crankshaft OEM quality MBK 51 electric

58,00 €
In stock
Standard Parts
Small End Bearing Peugeot 103 12x15x16.5mm
Artikel-Nr.: CGN676

Small End Bearing Peugeot 103 12x15x16.5mm

5,60 €
In stock
Standard Parts
Crankshaft Oil Seal 15x24x5mm Piaggio Ciao PX (x1)
Artikel-Nr.: CGN3268

Crankshaft Oil Seal 15x24x5mm Piaggio Ciao PX (x1)

4,60 €
In stock
Jasil
Crankshaft Top Racing Zündapp 2- / 3- / 4-speed
Artikel-Nr.: JA6030060

Crankshaft Top Racing Zündapp 2- / 3- / 4-speed

130,00 €
In stock
RMS
Crankshaft RMS 12mm piston pin Piaggio Ciao
Artikel-Nr.: R100010220

Crankshaft RMS 12mm piston pin Piaggio Ciao

92,00 €
In stock
Standard Parts
Crankshaft (old model) Puch Maxi E50
Artikel-Nr.: IP44400

Crankshaft (old model) Puch Maxi E50

41,00 €
In stock
Standard Parts
Crankshaft 12mm piston pin Piaggio Ciao
Artikel-Nr.: MOF-43922

Crankshaft 12mm piston pin Piaggio Ciao

54,00 €
In stock
Jasil
Crankshaft Top Racing Sachs / Hercules 3-speed
Artikel-Nr.: JA6030056

Crankshaft Top Racing Sachs / Hercules 3-speed

49,50 €
In stock
RRP
120,00 €
-59% Discount
Airsal
Crankshaft Airsal Peugeot 103 SP / MVL (big cone - contact ignition)
Artikel-Nr.: C31020640

Crankshaft Airsal Peugeot 103 SP / MVL (big cone - contact ignition)

28,00 €
In stock
Sale
Standard Parts
Crankshaft OEM quality Puch Maxi (engine E50)
Artikel-Nr.: IP38460

Crankshaft OEM quality Puch Maxi (engine E50)

51,00 €
In stock
Standard Parts
Crankshaft MBK 51 w/o woodruff key left thread (breaker)
Artikel-Nr.: CGN508823

Crankshaft MBK 51 w/o woodruff key left thread (breaker)

62,50 €
In stock
66,50 €
-6% Discount
Malossi
Small End Bearing Malossi MBK 51 13x16x14mm
Artikel-Nr.: M663276B

Small End Bearing Malossi MBK 51 13x16x14mm

16,00 €
In stock soon
MVT
Crankshaft MVT G1 S-Race MBK 51
Artikel-Nr.: MVT-VI34

Crankshaft MVT G1 S-Race MBK 51

141,00 €
In stock soon
RRP
167,00 €
-16% Discount
Athena
Crankshaft Athena Racing pin 12mm Piaggio Ciao
Artikel-Nr.: AT-S410480320002

Crankshaft Athena Racing pin 12mm Piaggio Ciao

128,00 €
In stock soon
MVT
Crankshaft G2B MVT SC stroke 39,7mm
Artikel-Nr.: MVT-VI41

Crankshaft G2B MVT SC stroke 39,7mm

169,00 €
In stock soon
RRP
199,00 €
-15% Discount
Doppler
Crankshaft Doppler ER1 Peugeot 103 SP / MV (electronic)
Artikel-Nr.: CGN263966

Crankshaft Doppler ER1 Peugeot 103 SP / MV (electronic)

104,00 €
In stock soon
118,00 €
-12% Discount
Standard Parts
Crankshaft reinforced Peugeot Fox
Artikel-Nr.: CGN440111

Crankshaft reinforced Peugeot Fox

117,00 €
In stock soon
Naraku
Crankshaft Bearing + Oil Seal Kit Peugeot Fox 50 1994-1998
Artikel-Nr.: NK168.01

Crankshaft Bearing + Oil Seal Kit Peugeot Fox 50 1994-1998

48,50 €
Currently not in stock
RMS
Bearing SKF 6203-C5 TN9 - 17x40x12mm Vespa Primavera
Artikel-Nr.: R100200080

Bearing SKF 6203-C5 TN9 - 17x40x12mm Vespa Primavera

8,90 €
Currently not in stock
Polini
Small End Bearing Polini P.R.E. 2 Piaggio Zip SP LC
Artikel-Nr.: P280.0060

Small End Bearing Polini P.R.E. 2 Piaggio Zip SP LC

15,00 €
Currently not in stock
Standard Parts
Crankshaft Bearings and Oil Seals Tomos A35
Artikel-Nr.: MF33.13900

Crankshaft Bearings and Oil Seals Tomos A35

15,00 €
Currently not in stock
2Fast
Connecting Rod 2Fast 95mm crankpin 18x41mm
Artikel-Nr.: TFAST065-ET01

Connecting Rod 2Fast 95mm crankpin 18x41mm

209,00 €
Currently not in stock
Athena
Crankshaft Athena Racing pin 10mm Piaggio Ciao
Artikel-Nr.: AT-S410480320001

Crankshaft Athena Racing pin 10mm Piaggio Ciao

128,00 €
Currently not in stock
Doppler
Crankshaft Doppler ER1 Peugeot 103 SP / MV (breaker points)
Artikel-Nr.: CGN263951

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

104,00 €
Currently not in stock
111,00 €
-6% Discount
Standard Parts
Crankshaft OEM quality Peugeot 103 MVL / SP electronic
Artikel-Nr.: EKP-138940

Crankshaft OEM quality Peugeot 103 MVL / SP electronic

50,00 €
Currently not in stock
55,00 €
-9% Discount
Standard Parts
Crankshaft OEM quality Peugeot Fox
Artikel-Nr.: SP-214506

Crankshaft OEM quality Peugeot Fox

89,00 €
Currently not in stock
RMS
Crankshaft RMS 10mm piston pin Piaggio Ciao
Artikel-Nr.: R100010210

Crankshaft RMS 10mm piston pin Piaggio Ciao

93,00 €
Currently not in stock
Schmitt
Ball Bearing Set metal cage C3 with FKM oil seals Schmitt Evolution with direction of twist Simson M500
Artikel-Nr.: STT54280

Ball Bearing Set metal cage C3 with FKM oil seals Schmitt Evolution with direction of twist Simson M500

35,00 €
Currently not in stock
Schmitt
Crankshaft Schmitt GST 60/70cc Simson S51 / S70 / S83 / KR51/2 / SR50
Artikel-Nr.: STT48825

Crankshaft Schmitt GST 60/70cc Simson S51 / S70 / S83 / KR51/2 / SR50

55,00 €
Currently not in stock
Schmitt
Crankshaft Schmitt GST 50cc Simson S51 / S53 / Schwalbe KR51/2 / SR50
Artikel-Nr.: STT48797

Crankshaft Schmitt GST 50cc Simson S51 / S53 / Schwalbe KR51/2 / SR50

51,00 €
Currently not in stock
Tomos
Woodruff Key flywheel Tomos A3 / A35 3,1x4,15
Artikel-Nr.: OE-TOM21308

Woodruff Key flywheel Tomos A3 / A35 3,1x4,15

2,20 €
Currently not in stock
Standard Parts
Woodruff Key alternator 9 /3x3 /8x2mm Sachs
Artikel-Nr.: MOF-44476

Woodruff Key alternator 9 /3x3 /8x2mm Sachs

3,10 €
Currently not in stock
Schmitt
Crankshaft Schmitt Dampfhammer 48mm stroke / 85mm conrod Simson
Artikel-Nr.: MOF-STT42039

Crankshaft Schmitt Dampfhammer 48mm stroke / 85mm conrod Simson

247,00 €
Currently not in stock
273,00 €
-10% Discount
Schmitt
Crankshaft Schmitt Dampfhammer 44mm stroke / 85mm conrod Simson
Artikel-Nr.: MOF-STT42038

Crankshaft Schmitt Dampfhammer 44mm stroke / 85mm conrod Simson

247,00 €
Currently not in stock
273,00 €
-10% Discount
Schmitt
Crankshaft Schmitt Drehfreund Simson
Artikel-Nr.: MOF-STT39569

Crankshaft Schmitt Drehfreund Simson

83,00 €
Currently not in stock
91,00 €
-9% Discount
Standard Parts
Crankshaft Oil Slinger Simson
Artikel-Nr.: MOF-42175

Crankshaft Oil Slinger Simson

1,50 €
Currently not in stock
2,00 €
-25% Discount
Standard Parts
Crankshaft Oil Thrower Spacer Disc 39x47x0.5mm Simson
Artikel-Nr.: MOF-41512

Crankshaft Oil Thrower Spacer Disc 39x47x0.5mm Simson

1,50 €
Currently not in stock
2,00 €
-25% Discount
Standard Parts
Crankshaft Oil Thrower Spacer Disc 39x47x0.4mm Simson
Artikel-Nr.: MOF-41438

Crankshaft Oil Thrower Spacer Disc 39x47x0.4mm Simson

1,60 €
Currently not in stock
2,00 €
-20% Discount
Standard Parts
Crankshaft Oil Thrower Spacer Disc 39x47x0.8mm Simson
Artikel-Nr.: MOF-41345

Crankshaft Oil Thrower Spacer Disc 39x47x0.8mm Simson

1,50 €
Currently not in stock
2,00 €
-25% Discount
Standard Parts
Crankshaft Top Racing HQ Puch Z50 2-speed
Artikel-Nr.: MOF-26799

Crankshaft Top Racing HQ Puch Z50 2-speed

107,00 €
Currently not in stock
111,00 €
-4% Discount
Standard Parts
Crankshaft Bearing L17TVP brass cage Puch 17x40x10mm (x1)
Artikel-Nr.: LAG.L17TVP

Crankshaft Bearing L17TVP brass cage Puch 17x40x10mm (x1)

14,50 €
Currently not in stock
Swiing
Crankshaft swiing Racing Tomos A35 / Classic / Quadro / Sport / Sport R / Sprint
Artikel-Nr.: MOF-53230

Crankshaft swiing Racing Tomos A35 / Classic / Quadro / Sport / Sport R / Sprint

165,00 €
Currently not in stock
Schmitt
Crankshaft Schmitt Drehfreund 44mm stroke / 85mm connecting rod / 80-110cc Simson S51 / S70 / S83 / M500 / M700
Artikel-Nr.: STT49362

Crankshaft Schmitt Drehfreund 44mm stroke / 85mm connecting rod / 80-110cc Simson S51 / S70 / S83 / M500 / M700

206,00 €
Currently not in stock
Schmitt
Crankshaft Schmitt Dampfhammer 44mm stroke / 85mm connecting rod / 80-110cc Simson S51 / S70 / S83 / M500 / M700
Artikel-Nr.: STT49363

Crankshaft Schmitt Dampfhammer 44mm stroke / 85mm connecting rod / 80-110cc Simson S51 / S70 / S83 / M500 / M700

206,00 €
Currently not in stock
Schmitt
Crankshaft Schmitt Drehfreund 44mm stroke / 85mm conrod 50-75cc Simson S51 / S70 / S83 / M500 / M700
Artikel-Nr.: STT49351

Crankshaft Schmitt Drehfreund 44mm stroke / 85mm conrod 50-75cc Simson S51 / S70 / S83 / M500 / M700

191,00 €
Currently not in stock
Jasil
Crankshaft Top Racing Evolution NG 44mm Sachs / Hercules / Prima / Sachs 505 engine
Artikel-Nr.: JA6034155

Crankshaft Top Racing Evolution NG 44mm Sachs / Hercules / Prima / Sachs 505 engine

141,00 €
Currently not in stock
SKF
Set crankshaft bearings + oil seals reinforced SKF C4 cage polyamide Peugeot Fox
Artikel-Nr.: SKF8869

Set crankshaft bearings + oil seals reinforced SKF C4 cage polyamide Peugeot Fox

50,00 €
Currently not in stock
Swiing
Crankshaft swiing Puch X30 NS / NL
Artikel-Nr.: MOF-43855

Crankshaft swiing Puch X30 NS / NL

132,00 €
Currently not in stock
145,00 €
-9% Discount
Standard Parts
Crankshaft OEM quality MBK 51 without key left hand thread (contact ignition)
Artikel-Nr.: CGN506271

Crankshaft OEM quality MBK 51 without key left hand thread (contact ignition)

126,00 €
Currently not in stock
Jasil
Crankshaft Top Racing Zündapp 5-speed
Artikel-Nr.: JA6030061

Crankshaft Top Racing Zündapp 5-speed

100,00 €
Currently not in stock
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Moped crankshaft - complete guide

The crankshaft is an essential component of every engine. Its task is to convert the linear motion of the piston into a smooth rotary motion and thus transfer the power to the wheel. It is not just a shaft: it is built to withstand combustion explosions, constant friction, high temperatures and extreme loads that would endanger other components.

If the crankshaft breaks, the engine comes to a standstill - and the consequential damage can be considerable. It is the central axis of all engine movements: Piston, ignition, gearbox, water pump... Every revolution requires precise balancing and accurate assembly of the rods, connecting rods and bearings. Any inaccuracy or misalignment causes vibrations that can result in a defect.

In our online store, you will find standard crankshafts (OEM) and racing crankshafts designed for higher loads. With a robust, properly designed crankshaft, the engine can develop its full potential - with an excellent compromise between torque and revving pleasure and a long service life.

If you want to repair the crankshaft without spending too much, you can find bearings, oil seals, bushings, piston pin bearings, connecting rods, spacers, piston pins and much more in our spare parts section.

→ Thanks to our explodedviews, you can easily identify the part you need.

Vintage vs. modern 50cc crankshafts: What has changed?

The crankshafts of mopeds and mopeds from the 60s to 90s were developed according to a completely different philosophy to that of modern 50cc motorcycles or scooters. Back then, the main focus of these 2-stroke crankshafts was on simplicity and reparability. Cast iron or simple forged steel constructions, dismountable construction for easier repairs, premix lubrication... The goal was clear: robust build, low costs and ensure that any reasonably competent mechanic can repair the part with basic tools. The component had to be durable and run for many kilometers without maintenance. Performance was not the priority; balancing and pre-compression were functional, but rather rudimentary.

Today, the picture has changed fundamentally. Today's crankshafts are precision forged from high-strength alloys and surface-treated using processes such as nitriding or induction hardening to maximize durability. Thanks to high-precision machining with minimal tolerances, many parts are machined directly from solid and thus achieve extremely high rigidity. The result is perfect dynamic balancing that extremely reduces or even eliminates vibrations - consistently designed for efficiency and performance.

You can find both types of crankshaft in our online store. If you are aiming for a true-to-original restoration and rebuilding your moped according to factory specifications, you can preserve the authentic character and mechanical simplicity. If, on the other hand, you want to tune the engine, you can turn your moped or moped into a little racer with modern, reinforced racing crankshafts. In addition, all other components are available as complete kits to achieve maximum performance (cylinders, exhausts, ignitions, variators etc...).

Crankshafts for classic mopeds: features, advantages and requirements

Not every crankshaft is the same. Depending on the engine type, displacement and intended use, there are different variants that offer the optimum balance of stability, performance and price. In this section, the most important features of each variant can be easily identified to help you make the right decision:

✅ Original crankshaft

⇒ APPLICATION: Standard spare part, daily use

⇒ FEATURES:

  • Webs: open design / half cheek
  • Stroke: standard
  • Connecting rod: Standard
  • Small end bearing: Standard
  • Balancing: basic
  • Performance: standard

⇒ ADVANTAGES: Inexpensive, plug-and-play assembly, corresponds to the series specifications.

⇒ REQUIREMENTS: Always replace seals and bearings during assembly.

⇒ RECOMMENDED: Motoforce, Standard Parts.

✅ Sport and racing crankshaft

⇒ APPLICATION: Suitable for improved road performance through to racing.

⇒ FEATURES:

  • Reinforced crankshaft
  • Webs: mostly full circle, more solid materials
  • Stroke: standard or long stroke
  • Connecting rod: reinforced
  • Piston pin bearings: higher quality
  • Balancing: optimized
  • Performance: improved

⇒ ADVANTAGES: better compression and increased reliability under high loads.

⇒ REQUIREMENTS: Sport or racing cylinder, matching exhaust, matching carburetor tuning, high-quality bearings.

⇒ RECOMMENDED: Stage6 HPC, Malossi, Polini, Doppler, Schmitt...

Extended range: crankshafts, spare parts and complete engine kits

The range is wide: from standard parts to racing parts, as a kit or individually.

If the displacement is increased to 65cc, 75cc or over 100cc, the standard crankshaft is no longer sufficient. The solution is to upgrade to a reinforced or racing model that can safely handle the increase in torque and high engine speeds. Only in this way can the potential of a powerful cylinder or exhaust be fully exploited and the energy transferred effectively and safely.

We offer the complete Racing and High End Racing product lines from Stage6, Malossi, Polini, Athena, MVT, Jasil, Schmitt, Swiing and other manufacturers who are renowned for quality and performance.

Why replace the crankshaft?

Crankshafts work in one of the toughest environments in the engine: extreme temperatures, constant mechanical stress... Over time, wear adds up and failure becomes inevitable. When it does, the damage is rarely limited. A defective crankshaft can damage cylinders, pistons and even the engine housing...

It is therefore advisable to replace the crankshaft at high mileage or when upgrading to a more powerful cylinder.

Recommendations for installing a crankshaft

  • Always fit new bearings and oil seals: reusing old parts saves money in the wrong place and leads to premature failure
  • Ensure perfect centering and balancing: incorrect assembly causes vibrations, destroys bearings and can cause the engine housing to crack
  • If you lack experience, it is better to have it fitted by a qualified specialist workshop

FAQ - Frequently asked questions about crankshafts

⇒ Does the crankshaft have to be replaced when installing a new cylinder?

If the displacement or power is increased: yes, absolutely. The standard crankshaft is not designed to cope with the higher torque requirements and the higher RPMs. It must be replaced with a suitably reinforced model. Otherwise there is a risk of considerable damage.

⇒ Can the crankshaft be replaced without help?

This is of course doable, but working on the crankshaft requires special tools and experience in dealing with tolerances. A single mistake during reassembly can lead to catastrophic engine damage. If you are not absolutely sure, it is better to call a professional. If you are carrying out the work yourself, strictly follow the manufacturer's workshop manual and refer to the instructions for installing and removing the crankshaft for detailed steps.

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