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Crankshaft

(121 Produkte)
Schaltmoped Crankshafts Bearings and Oil Seals Small End Bearings Crankshaft Accessories
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Product type
Bearing & gasket tools Bearing open Clutch gear Connecting rod kit Crankshaft Crankshaft bearing kit Needle bearing Oil seal Oil seal kit Washer Woodruff key Counterbalance shaft
Brand
2Fast Airsal Barikit Bidalot Conti Derbi Doppler Italkit Malossi Metrakit MotoForce MotoForce Racing MVT Naraku Parmakit Polini Rieju RMS SKF Stage6 Stage6 R/T Standard Parts Top Performances Voca Racing Yamaha
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MotoForce
Crankshaft verstärkt MotoForce 20mm Lagersitz AM6
Artikel-Nr.: MF30.11001
1

Crankshaft verstärkt MotoForce 20mm Lagersitz AM6

52,00 €
In stock
RRP
69,00 €
-25% Discount
Sale
MotoForce
Small End Bearing reinforced
Artikel-Nr.: MF33000_MF_AGUILLES

Small End Bearing reinforced

2,40 €
In stock
6,60 €
-64% Discount
MotoForce
Crankshaft verstärkt MotoForce Derbi Euro 3 / 4
Artikel-Nr.: MF30.19300

Crankshaft verstärkt MotoForce Derbi Euro 3 / 4

55,50 €
In stock
MotoForce
Crankshaft Bearing Set Derbi
Artikel-Nr.: MF33.12502
1

Crankshaft Bearing Set Derbi

17,00 €
In stock
RRP
22,50 €
-24% Discount
Sale
MotoForce
Crankshaft Bearing Set AM6
Artikel-Nr.: MF33.11005

Crankshaft Bearing Set AM6

16,00 €
In stock
RRP
22,00 €
-27% Discount
Sale
MotoForce
Counterbalance Shaft AM6
Artikel-Nr.: MF60.18813

Counterbalance Shaft AM6

10,00 €
In stock
RRP
22,00 €
-55% Discount
Sale
MotoForce
Oil Seals crankshaft Derbi
Artikel-Nr.: MF96.00034

Oil Seals crankshaft Derbi

6,00 €
In stock
RRP
6,10 €
-2% Discount
MotoForce
Oil Seals crankshaft AM6
Artikel-Nr.: MF96.00035

Oil Seals crankshaft AM6

6,10 €
In stock
RRP
6,50 €
-6% Discount
MotoForce
Crankshaft Motoforce Derbi Euro 2
Artikel-Nr.: MF30.12500

Crankshaft Motoforce Derbi Euro 2

47,00 €
In stock
RRP
54,00 €
-13% Discount
MotoForce
Crankshaft Motoforce AM6
Artikel-Nr.: MF30.11000
1

Crankshaft Motoforce AM6

39,00 €
In stock
RRP
56,50 €
-31% Discount
Sale
Stage6
Crankshaft Stage6 HPC Derbi Euro 3 / 4
Artikel-Nr.: S6-8019300

Crankshaft Stage6 HPC Derbi Euro 3 / 4

131,00 €
In stock
RRP
212,00 €
-38% Discount
Sale
Stage6
Small End Bearing HQ Stage6
Artikel-Nr.: S6-8020_SIZES
3

Small End Bearing HQ Stage6

10,00 €
In stock
Stage6
Crankshaft Stage6 HPC 45mm stroke / 90mm conrod AM6
Artikel-Nr.: S6-8018810
1

Crankshaft Stage6 HPC 45mm stroke / 90mm conrod AM6

228,00 €
In stock
Stage6
Crankshaft Stage6 HPC 45mm stroke Derbi Euro 3 / 4
Artikel-Nr.: S6-8019310

Crankshaft Stage6 HPC 45mm stroke Derbi Euro 3 / 4

228,00 €
In stock
Stage6
Crankshaft Stage6 Pro Replica Derbi Euro 3 / 4
Artikel-Nr.: S6-8119300

Crankshaft Stage6 Pro Replica Derbi Euro 3 / 4

57,00 €
In stock
RRP
140,00 €
-59% Discount
Sale
Stage6
Crankshaft Stage6 Pro Replica AM6
Artikel-Nr.: S6-8118800
1

Crankshaft Stage6 Pro Replica AM6

60,00 €
In stock
RRP
148,00 €
-59% Discount
Sale
Stage6
Crankshaft Stage6 HPC MK2 AM6
Artikel-Nr.: S6-8018801
1

Crankshaft Stage6 HPC MK2 AM6

239,00 €
In stock
Stage6
Crankshaft Stage6 HPC 44mm stroke AM6
Artikel-Nr.: S6-8018809

Crankshaft Stage6 HPC 44mm stroke AM6

212,00 €
In stock
Stage6
Albero motore Stage6 HPC Derbi Euro 3 / Euro 4 corsa 44mm
Artikel-Nr.: S6-8019309

Albero motore Stage6 HPC Derbi Euro 3 / Euro 4 corsa 44mm

99,50 €
In stock
RRP
205,00 €
-51% Discount
Sale
Stage6
Dummy Bearings 6303 Minarelli AM6 (x2)
Artikel-Nr.: S6-8039101

Dummy Bearings 6303 Minarelli AM6 (x2)

6,00 €
In stock
RRP
11,50 €
-48% Discount
Sale
Stage6
Dummy Bearings 6204 Minarelli / Derbi (x2)
Artikel-Nr.: S6-8039100

Dummy Bearings 6204 Minarelli / Derbi (x2)

6,00 €
In stock
RRP
11,50 €
-48% Discount
Sale
Stage6
Crankshaft Stage6 HPC Derbi Euro 2
Artikel-Nr.: S6-8019200

Crankshaft Stage6 HPC Derbi Euro 2

192,00 €
In stock
RRP
212,00 €
-9% Discount
Stage6 R/T
Crankshaft Stage6 R/T 44mm stroke / 95mm conrod Derbi Euro 3 / 4
Artikel-Nr.: S6-7919305

Crankshaft Stage6 R/T 44mm stroke / 95mm conrod Derbi Euro 3 / 4

237,00 €
In stock
RRP
423,00 €
-44% Discount
Sale
Stage6 R/T
Crankshaft Stage6 R/T 44mm stroke / 90mm conrod AM6
Artikel-Nr.: S6-7918805

Crankshaft Stage6 R/T 44mm stroke / 90mm conrod AM6

199,00 €
In stock
RRP
423,00 €
-53% Discount
Sale
Stage6 R/T
Oil Seals crankshaft + water pump Stage6 R/T Derbi
Artikel-Nr.: S6-8041939

Oil Seals crankshaft + water pump Stage6 R/T Derbi

9,00 €
In stock
RRP
20,00 €
-55% Discount
Sale
Stage6 R/T
Crankshaft Oil Seals Stage6 R/T FKM 20x35x7mm Derbi Euro 2 / 3 / 4
Artikel-Nr.: S6-8041931

Crankshaft Oil Seals Stage6 R/T FKM 20x35x7mm Derbi Euro 2 / 3 / 4

17,00 €
In stock
Stage6 R/T
Crankshaft Oil Seals Stage6 R/T FKM Minarelli AM6
Artikel-Nr.: S6-8041881

Crankshaft Oil Seals Stage6 R/T FKM Minarelli AM6

17,00 €
In stock
Stage6 R/T
Crankshaft Bearing Set Stage6 R/T C3 polymer cage Derbi
Artikel-Nr.: S6-8031931/TN9

Crankshaft Bearing Set Stage6 R/T C3 polymer cage Derbi

40,00 €
In stock
RRP
44,00 €
-9% Discount
Stage6 R/T
Crankshaft Bearing Set Stage6 R/T C3 steel cage Derbi
Artikel-Nr.: S6-8031931/MET

Crankshaft Bearing Set Stage6 R/T C3 steel cage Derbi

35,00 €
In stock
RRP
38,00 €
-8% Discount
Stage6 R/T
Crankshaft Bearing Set Stage6 R/T C3 polymer cage for 17mm + 20mm journal AM6
Artikel-Nr.: S6-8031882/TN9

Crankshaft Bearing Set Stage6 R/T C3 polymer cage for 17mm + 20mm journal AM6

44,00 €
In stock
Stage6 R/T
Crankshaft Bearing Set Stage6 R/T C3 polymer cage AM6
Artikel-Nr.: S6-8031880/TN9

Crankshaft Bearing Set Stage6 R/T C3 polymer cage AM6

44,00 €
In stock
Stage6 R/T
Crankshaft Bearing Set Stage6 R/T C3 steel cage AM6
Artikel-Nr.: S6-8031880/MET
1

Crankshaft Bearing Set Stage6 R/T C3 steel cage AM6

37,00 €
In stock
Stage6 R/T
Crankshaft Bearing Set Stage6 R/T C3 steel cage for 20mm journal AM6
Artikel-Nr.: S6-8031881/MET

Crankshaft Bearing Set Stage6 R/T C3 steel cage for 20mm journal AM6

34,00 €
In stock
RRP
37,00 €
-8% Discount
Polini
Small End Bearing Polini Big Evolution 13x17x17,3mm Piaggio / Minarelli
Artikel-Nr.: P280.0057

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

23,00 €
In stock
RRP
28,00 €
-18% Discount
Sale
Polini
Small end bearing Polini
Artikel-Nr.: P280.00_SMALLENDBEARING

Small end bearing Polini

8,40 €
In stock
9,90 €
-15% Discount
MotoForce Racing
Oil Seals crankshaft reinforced Viton® AM6
Artikel-Nr.: MF96.00037

Oil Seals crankshaft reinforced Viton® AM6

12,50 €
In stock
RRP
14,00 €
-11% Discount
MotoForce Racing
Oil Seals crankshaft reinforced Viton® Derbi
Artikel-Nr.: MF96.00036

Oil Seals crankshaft reinforced Viton® Derbi

12,50 €
In stock
RRP
14,00 €
-11% Discount
Standard Parts
Woodruff Key ignition 3 x 3.7mm Minarelli AM6
Artikel-Nr.: MF60.10001

Woodruff Key ignition 3 x 3.7mm Minarelli AM6

1,80 €
In stock
Derbi
Small End Bearing 12x15x15mm Derbi Euro 3 (D50B0)
Artikel-Nr.: OE-DE847529

Small End Bearing 12x15x15mm Derbi Euro 3 (D50B0)

20,00 €
In stock
Yamaha
Key for counterbalance shaft Yamaha / MBK AM6
Artikel-Nr.: OE-AM90282-04807

Key for counterbalance shaft Yamaha / MBK AM6

7,60 €
In stock
Yamaha
Crankshaft Key parallel 4x4x20 clutch-side AM6
Artikel-Nr.: OE-AM90282-04806

Crankshaft Key parallel 4x4x20 clutch-side AM6

6,00 €
In stock
7,00 €
-14% Discount
Sale
Yamaha
Ignition Woodruff Key AM6
Artikel-Nr.: OE-AM1TL-E1545-00

Ignition Woodruff Key AM6

3,00 €
In stock
Yamaha
Small End Bearing 12x15x15 Yamaha / MBK AM6
Artikel-Nr.: OE-AM1TL-E1202-00

Small End Bearing 12x15x15 Yamaha / MBK AM6

25,50 €
In stock
Polini
Crankshaft Bearing Set Polini Derbi
Artikel-Nr.: P282.0004

Crankshaft Bearing Set Polini Derbi

24,00 €
In stock
RRP
30,00 €
-20% Discount
Sale
Polini
Crankshaft Bearings Polini + Oil Seals Minarelli AM6
Artikel-Nr.: P282.0003

Crankshaft Bearings Polini + Oil Seals Minarelli AM6

30,00 €
In stock
RRP
31,00 €
-3% Discount
Polini
Crankshaft Oil Seals Polini Evolution Viton® Derbi
Artikel-Nr.: P285.0004

Crankshaft Oil Seals Polini Evolution Viton® Derbi

16,50 €
In stock
RRP
18,00 €
-8% Discount
Polini
Crankshaft Oil Seals Polini Evolution Viton® AM6
Artikel-Nr.: P285.0003

Crankshaft Oil Seals Polini Evolution Viton® AM6

18,50 €
In stock
RRP
20,00 €
-8% Discount
Voca Racing
Crankshaft Bearings Voca Polymer Yamaha DT 50 LC Portugal
Artikel-Nr.: VCR-RD72130/C4

Crankshaft Bearings Voca Polymer Yamaha DT 50 LC Portugal

23,00 €
In stock
Sale
Naraku
Oil Seal Naraku FKM Premium 24x43x6mm
Artikel-Nr.: NK103.96

Oil Seal Naraku FKM Premium 24x43x6mm

4,80 €
In stock
Naraku
Oil Seal Naraku FKM Premium 22x38x6mm
Artikel-Nr.: NK103.91

Oil Seal Naraku FKM Premium 22x38x6mm

5,40 €
In stock
Naraku
Oil Seal Naraku FKM Premium 17x30x6mm
Artikel-Nr.: NK103.47

Oil Seal Naraku FKM Premium 17x30x6mm

5,40 €
In stock
Rieju
Thrust Washer crankshaft d.16,9x24x8mm Rieju MRT
Artikel-Nr.: OE-RIE0005.490.4663

Thrust Washer crankshaft d.16,9x24x8mm Rieju MRT

16,50 €
In stock
SKF
Bearing SKF 6203 C3 TN9 17x40x12mm polymer cage
Artikel-Nr.: SKF6203TN9/C3

Bearing SKF 6203 C3 TN9 17x40x12mm polymer cage

9,30 €
In stock
Malossi
Crankshaft Malossi MHR RHQ Derbi Euro 3 / 4
Artikel-Nr.: M5312990

Crankshaft Malossi MHR RHQ Derbi Euro 3 / 4

321,00 €
In stock
RRP
397,00 €
-19% Discount
Sale
2Fast
Small End Bearing 2Fast 14x17x17mm
Artikel-Nr.: TFAST154

Small End Bearing 2Fast 14x17x17mm

14,00 €
In stock
Sale
Bidalot
Crankshaft Bidalot RF50WR 39,7mm stroke / 85mm conrod AM6
Artikel-Nr.: BID12100568

Crankshaft Bidalot RF50WR 39,7mm stroke / 85mm conrod AM6

252,00 €
In stock
279,00 €
-10% Discount
Sale
Top Performances
Crankshaft Top Performances 44mm stroke Derbi Euro 3 / 4
Artikel-Nr.: T9930210

Crankshaft Top Performances 44mm stroke Derbi Euro 3 / 4

171,00 €
In stock
RRP
267,00 €
-36% Discount
Sale
Bidalot
Crankshaft Bidalot RF50WR 39,7mm stroke / 85mm conrod Derbi Euro 3 / 4
Artikel-Nr.: BID12100588

Crankshaft Bidalot RF50WR 39,7mm stroke / 85mm conrod Derbi Euro 3 / 4

267,00 €
In stock
Bidalot
Crankshaft Bidalot RF50WR 39,7mm stroke / 85mm conrod Derbi Euro 2
Artikel-Nr.: BID12100578

Crankshaft Bidalot RF50WR 39,7mm stroke / 85mm conrod Derbi Euro 2

244,00 €
In stock
RRP
280,00 €
-13% Discount
Sale
Bidalot
Crankshaft Bidalot Racing Factory 44,9mm stroke / 90mm conrod Derbi Euro 3 / 4
Artikel-Nr.: BID12100886

Crankshaft Bidalot Racing Factory 44,9mm stroke / 90mm conrod Derbi Euro 3 / 4

244,00 €
In stock
RRP
280,00 €
-13% Discount
Sale
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50cc bike Crankshafts: performance and reliability with every revolution

The crankshaft is a central component of every engine. It converts the linear movement of the piston into a smooth rotary movement and transmits the power to the rear wheel via the transmission / CVT. In doing so, it is exposed to extreme loads: combustion pressure, permanent friction, high temperatures and high speeds. A crankshaft is not a simple component, but is precisely designed for these conditions.

If the crankshaft fails, the engine comes to a standstill. It is the central axis of all engine movement: Piston, CVT and gearbox. Each revolution requires a perfect balance between the crank webs, connecting rods and bearings. If this balance is lost, vibrations occur, causing rough engine operation and potentially severe engine damage.

A reinforced crankshaft or racing crankshaft not only increases performance, but also determines the durability and reliability of the engine, especially on tuned Superemotos / Enduro Bikes.

In our online store you will find OEM crankshafts as replacement for the stock crankshaft as well as racing crankshafts for higher loads. With a reliable crankshaft, the engine can develop its full potential and offers a powerful, more precise riding experience that is up to any challenge.

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

→ Thanks to our exploded views, you can find the right part quickly and easily.

Crankshaft types for 50cc motorcycles: features, advantages and requirements

Not all crankshafts are the same. Depending on the engine type, displacement and intended use, there are different product lines that offer the ideal balance between durability, performance and price. Below is a list with the most important features of the different types to help you make the right choice:

✅ OEM / Original crankshaft

→ APPLICATION: OEM quality replacement

→ FEATURES:

  • Stroke: Original
  • Connecting rod: Original
  • Small end bearing: Standard
  • Balancing: Standard
  • Performance: Standard

→ ADVANTAGES: Inexpensive, easy to install (plug & play)

→ REQUIREMENTS: Replacement of seals and bearings is recommended.

→ RECOMMENDED Crankshafts: Motoforce, OEM

✅ Sport & Racing crankshaft

→ APPLICATION: Suitable for everyday use through to sports / racing applications.

→ FEATURES:

  • Reinforced crankshaft
  • Crank webs: Full circle, reinforced
  • Stroke: original - 44 mm
  • Connecting rod: mostly original
  • Smal end bearing: reinforced
  • Balancing: optimized
  • Performance: improved

→ ADVANTAGES: Higher reliability, better pre-compression, optimized torque

→ REQUIREMENTS: Use suitable bearings. If stroke or rod length differs from stock, crankcase modification is required.

→ RECOMMENDED CRANKSHAFTS:

✅ High end crankshaft

→ APPLICATION: Exclusively for racing.

→ FEATURES:

  • Ultra-reinforced crankshaft
  • Crank webs: Full circle, high-strength materials
  • Stroke: up to 50 mm
  • Connecting rod: forged and reinforced
  • Small end bearing: reinforced HQ (often silver-plated)
  • Balancing: high-precision with counterweights for maximum performance and smooth running
  • Performance: maximum torque, power and stability

→ ADVANTAGES: Outstanding durability, linear power delivery and maximum performance.

→ REQUIREMENTS: Crankcase machining (depending on model), high-quality components and bearings, professional installation required.

→ RECOMMENDED CURVES: Stage6 R/T, 2Fast, Ottopuntouno, Polini PR

Huge selection: Crankshafts, spare parts and complete engine kits

In our store you will find everything from original spare parts (Rieju, Derbi) and inexpensive replicas such as Motoforce to exclusive components for 50cc tuning engines.

If the displacement is increased to 70, 88 or even 100cc, the standard crankshaft is no longer sufficient. The solution is to replace it with a reinforced or racing crankshaft that can reliably withstand higher torque and speeds. Without a suitable crankshaft, the entire setup will not function optimally.

We stock racing and high-end shafts from Stage6 R/T, Malossi, Polini, 2Fast, Metrakit, Italkit, Airsal,Top Performances and many other renowned brands.

Why replace the crankshaft?

The crankshaft works under extreme conditions: high temperatures, continuous loads and not always perfect lubrication. Over time or with a lack of maintenance, it wears out and can fail. In this case, the damage is usually not limited to the crankshaft - cylinders and other important components can also be affected. Timely replacement of the crankshaft is ultimately much more cost-effective than a complete engine repair.

On 50cc motorcycles with Minarelli AM6 or Derbi Euro 2/3 engines, the standard crankshafts are robust. For these kinds of bikes, crankshafts are usually upgraded by a reinforced or racing crankshaft for 70, 80 or 90cc cylinders to increase performance.

Crankshaft installation tips

  • Always use new bearings and seals.
  • Ensure perfect centering → avoids vibrations and breakages.
  • VERY IMPORTANT: If you have no experience, leave the installation to a specialist.

Maintenance and inspection of crankshafts

Each type of crankshaft requires specific maintenance to ensure reliability and longevity. Regular inspections and the timely replacement of bearings and seals are essential. Pay attention to unusual noises or vibrations - these are often the first signs of wear. If the main bearings make noises or the engine runs uneven, the crankshaft should be replaced as soon as possible to avoid consequential damage to the cylinder or engine failure.

FAQ - Frequently asked questions about the crankshaft

→ Do I have to replace the crankshaft when increasing displacement? Yes. The stock crankshaft cannot reliably handle higher torque and increased RPM. A reinforced or racing crankshaft is required.

→ Can I replace the crankshaft myself? Installation is tricky and requires special tools. Without experience, this should be left to a specialist. If you want to do it yourself, we recommend following the workshop manual or consulting our crankshaft assembly / disassembly instructions.

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