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Crankshaft

(187 products)
Scooter Crankshafts Bearings and Oil Seals Small End Bearings Crankshaft Accessories
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Bearing & gasket tools Bearing open Connecting rod kit Crankcase Crankshaft Crankshaft accessories Crankshaft bearing kit Needle bearing Oil seal Oil seal kit Woodruff key
Brand
2Fast Airsal Athena Bidalot Doppler Jasil Malossi MotoForce MotoForce Racing Naraku Ottopuntouno Peugeot Piaggio Polini RMS SKF Stage6 Stage6 R/T Standard Parts Top Performances Yamaha
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Doppler
Crankshaft Doppler Endurance 10mm pin Minarelli horizontal
Article no.: CGN441280
17

Crankshaft Doppler Endurance 10mm pin Minarelli horizontal

139,00 €
In stock
RRP
149,00 €
-7% Discount
Sale
Doppler
Crankshaft Doppler Endurance Yamaha BW's / Slider
Article no.: CGN441277
27

Crankshaft Doppler Endurance Yamaha BW's / Slider

146,00 €
In stock
RRP
149,00 €
-2% Discount
Jasil
Crankshaft reinforced 12mm pin 16mm stub CPI
Article no.: MF30.19505
2

Crankshaft reinforced 12mm pin 16mm stub CPI

91,00 €
In stock
Sale
Naraku
Crankshaft Naraku Yamaha / MBK 50cc 4-stroke
Article no.: NK600.57

Crankshaft Naraku Yamaha / MBK 50cc 4-stroke

118,00 €
In stock
Naraku
Crankshaft Naraku Honda X8R / Sky
Article no.: NK105.11

Crankshaft Naraku Honda X8R / Sky

80,50 €
In stock
Polini
Crankshaft Polini For Race Minarelli horizontal
Article no.: P210.0048
2

Crankshaft Polini For Race Minarelli horizontal

142,00 €
In stock
RRP
167,00 €
-15% Discount
Naraku
Crankshaft Naraku HQ, GY6 139QMB/QMA, 16 teeth
Article no.: NK100.81
1

Crankshaft Naraku HQ, GY6 139QMB/QMA, 16 teeth

111,00 €
In stock
Doppler
Crankshaft Doppler Endurance Peugeot Speedfight Euro 2 after 2004
Article no.: CGN468200

Crankshaft Doppler Endurance Peugeot Speedfight Euro 2 after 2004

157,00 €
In stock
RRP
169,00 €
-7% Discount
Top Performances
Small End Bearing Top Performances 12x15x15mm
Article no.: T9921330
22

Small End Bearing Top Performances 12x15x15mm

7,70 €
In stock
MotoForce Racing
Crankshaft Motoforce Racing Peugeot vertical
Article no.: MF30.17502
3

Crankshaft Motoforce Racing Peugeot vertical

116,00 €
In stock
MotoForce Racing
Crankshaft Motoforce Racing Minarelli vertical
Article no.: MF30.16802
30

Crankshaft Motoforce Racing Minarelli vertical

86,00 €
In stock
RRP
95,00 €
-9% Discount
Doppler
Crankshaft Doppler S1R Peugeot vertical
Article no.: CGN468199
3

Crankshaft Doppler S1R Peugeot vertical

149,00 €
In stock
RRP
159,00 €
-6% Discount
Doppler
Small End Bearing Doppler 12x16x15
Article no.: CGN461989

Small End Bearing Doppler 12x16x15

10,00 €
In stock
Standard Parts
Crankshaft 16 teeth 139QMB/QMA
Article no.: BT7001-16

Crankshaft 16 teeth 139QMB/QMA

43,00 €
In stock
44,00 €
-2% Discount
Standard Parts
Crankshaft standard 16 teeth Peugeot Kisbee 4 stroke
Article no.: CGN494099

Crankshaft standard 16 teeth Peugeot Kisbee 4 stroke

70,50 €
In stock
75,00 €
-6% Discount
Jasil
Crankshaft Jasil China 2-stroke 12mm pin 16mm stub
Article no.: JA6030118

Crankshaft Jasil China 2-stroke 12mm pin 16mm stub

74,00 €
In stock
Sale
Standard Parts
Crankshaft GY6 139QMA / 139QMB 16 teeth
Article no.: MF30.13900

Crankshaft GY6 139QMA / 139QMB 16 teeth

57,50 €
In stock
Standard Parts
Crankshaft Motoforce Peugeot vertical after 2004 Euro 2
Article no.: MF30.17600
1

Crankshaft Motoforce Peugeot vertical after 2004 Euro 2

101,00 €
In stock
111,00 €
-9% Discount
Jasil
Crankshaft Morini AC
Article no.: MF30.15700
1

Crankshaft Morini AC

74,00 €
In stock
Sale
Jasil
Crankshaft OEM quality Kymco Cobra / Grand Dink
Article no.: MF30.18500

Crankshaft OEM quality Kymco Cobra / Grand Dink

68,00 €
In stock
RRP
89,00 €
-24% Discount
Sale
Standard Parts
Crankshaft OEM quality Suzuki Katana (Morini AC)
Article no.: MF30.15100

Crankshaft OEM quality Suzuki Katana (Morini AC)

54,50 €
In stock
Standard Parts
Crankshaft OEM quality Yamaha Aerox 4-stroke
Article no.: CGN519894

Crankshaft OEM quality Yamaha Aerox 4-stroke

67,50 €
In stock
Naraku
Bushing Naraku 24x18x14mm TGB crankshaft
Article no.: NK105.23

Bushing Naraku 24x18x14mm TGB crankshaft

14,00 €
In stock
Piaggio
Crankshaft original Piaggio 50cc 2T
Article no.: OE-PIA4316255

Crankshaft original Piaggio 50cc 2T

76,50 €
In stock
Yamaha
Crankshaft MBK Booster / Yamaha BW's after 2004
Article no.: OE-MAL5WWE14000200

Crankshaft MBK Booster / Yamaha BW's after 2004

268,00 €
In stock
Stage6
Crankshaft Stage6 HPC MK2 Piaggio / Vespa
Article no.: S6-8014001
2

Crankshaft Stage6 HPC MK2 Piaggio / Vespa

217,00 €
In stock soon
Stage6
Dummy Bearing 20x52x12mm Piaggio 50cc (x2)
Article no.: S6-8039103

Dummy Bearing 20x52x12mm Piaggio 50cc (x2)

11,50 €
In stock soon
Stage6 R/T
Crankshaft Stage6 R/T 90mm conrod Malossi C-One
Article no.: S6-7914010

Crankshaft Stage6 R/T 90mm conrod Malossi C-One

370,00 €
In stock soon
RRP
411,00 €
-10% Discount
2Fast
Crankcase Spacer 5mm 2Fast Minarelli horizontal
Article no.: TFAST122

Crankcase Spacer 5mm 2Fast Minarelli horizontal

38,00 €
In stock soon
SKF
Needle Bearing SKF HK1010 10x14x10mm AM6
Article no.: SP-215224

Needle Bearing SKF HK1010 10x14x10mm AM6

4,90 €
In stock soon
Naraku
Crankshaft Bearings and Oil Seals FKM Naraku Honda X8R
Article no.: NK104.24

Crankshaft Bearings and Oil Seals FKM Naraku Honda X8R

61,00 €
In stock soon
2Fast
Small End Bearing 2Fast 12x17x16mm
Article no.: TFAST152

Small End Bearing 2Fast 12x17x16mm

19,00 €
In stock soon
2Fast
Crankshaft 2Fast 47mm stroke / 95mm conrod Minarelli horizontal
Article no.: TFAST087

Crankshaft 2Fast 47mm stroke / 95mm conrod Minarelli horizontal

425,00 €
In stock soon
2Fast
Connecting Rod 2Fast 100mm pin 18 x 37mm Minarelli
Article no.: TFAST129

Connecting Rod 2Fast 100mm pin 18 x 37mm Minarelli

190,00 €
In stock soon
2Fast
Connecting Rod 2Fast 95mm crankpin 18x41mm
Article no.: TFAST065-ET01

Connecting Rod 2Fast 95mm crankpin 18x41mm

209,00 €
In stock soon
2Fast
Crankshaft 2Fast 47mm stroke Malossi C-one / RC-one
Article no.: TFAST076

Crankshaft 2Fast 47mm stroke Malossi C-one / RC-one

542,00 €
In stock soon
2Fast
Crankshaft 2Fast HQ 85mm connecting rod Piaggio
Article no.: TFAST062

Crankshaft 2Fast HQ 85mm connecting rod Piaggio

479,00 €
In stock soon
2Fast
Crankshaft 2Fast 45,8mm stroke / 90mm conrod Minarelli horizontal
Article no.: TFAST034

Crankshaft 2Fast 45,8mm stroke / 90mm conrod Minarelli horizontal

452,00 €
In stock soon
RRP
466,00 €
-3% Discount
Ottopuntouno Racing Parts
CrankshaftOttopuntouno 8.1 R18 Fireblade
Article no.: OPU020

CrankshaftOttopuntouno 8.1 R18 Fireblade

605,00 €
In stock soon
Ottopuntouno Racing Parts
Crankshaft Ottopuntouno 8.1 Malossi RC-One
Article no.: OPU005

Crankshaft Ottopuntouno 8.1 Malossi RC-One

611,00 €
In stock soon
Athena
Crankshaft Athena 43mm stroke 85mm conrod 12mm pin Minarelli vertical
Article no.: ATH070314/2

Crankshaft Athena 43mm stroke 85mm conrod 12mm pin Minarelli vertical

155,00 €
In stock soon
Doppler
Crankshaft Doppler S1R Peugeot horizontal
Article no.: CGN464918
1

Crankshaft Doppler S1R Peugeot horizontal

146,00 €
In stock soon
RRP
159,00 €
-8% Discount
MotoForce Racing
Crankshaft Motoforce Racing Minarelli horizontal
Article no.: MF30.16602
11

Crankshaft Motoforce Racing Minarelli horizontal

85,00 €
In stock soon
RRP
95,00 €
-11% Discount
MotoForce Racing
Crankshaft Motoforce Racing Piaggio
Article no.: MF30.14002
12

Crankshaft Motoforce Racing Piaggio

110,00 €
In stock soon
Naraku
Crankshaft bearings Naraku, Honda
Article no.: NK100.66

Crankshaft bearings Naraku, Honda

42,00 €
Currently not in stock
Polini
Crankshaft Bearings Polini + Oil Seals Yamaha Aerox / BW's
Article no.: P282.0002
69

Crankshaft Bearings Polini + Oil Seals Yamaha Aerox / BW's

31,00 €
Currently not in stock
Naraku
Crankshaft Bearing Set Naraku HD Morini 50cc 2T
Article no.: NK104.06

Crankshaft Bearing Set Naraku HD Morini 50cc 2T

38,50 €
Currently not in stock
Naraku
Crankshaft Bearings HD and Oil Seals FKM Naraku Honda X8R
Article no.: NK104.11

Crankshaft Bearings HD and Oil Seals FKM Naraku Honda X8R

47,00 €
Currently not in stock
48,00 €
-2% Discount
2Fast
Connecting Rod 2Fast 100mm pin 18 x 41mm Piaggio
Article no.: TFAST130

Connecting Rod 2Fast 100mm pin 18 x 41mm Piaggio

209,00 €
Currently not in stock
Naraku
Crankshaft bearings Naraku, Honda X8R
Article no.: NK100.75

Crankshaft bearings Naraku, Honda X8R

38,50 €
Currently not in stock
39,00 €
-1% Discount
Stage6 R/T
Oil Seals crankshaft + water pump Stage6 R/T Minarelli LC
Article no.: S6-8041669

Oil Seals crankshaft + water pump Stage6 R/T Minarelli LC

18,00 €
Currently not in stock
RRP
20,00 €
-10% Discount
Stage6 R/T
Crankshaft Oil Seals Stage6 R/T NBR Peugeot Speedfight 1 + 2
Article no.: S6-8041751

Crankshaft Oil Seals Stage6 R/T NBR Peugeot Speedfight 1 + 2

17,00 €
Currently not in stock
Stage6 R/T
Crankshaft Bearing Set Stage6 R/T C4 steel cage Minarelli
Article no.: S6-8031660/MET
3

Crankshaft Bearing Set Stage6 R/T C4 steel cage Minarelli

37,00 €
Currently not in stock
SKF
Needle Bearing SKF HK1210 12x16x10mm gear selector shaft AM6
Article no.: SP-215223

Needle Bearing SKF HK1210 12x16x10mm gear selector shaft AM6

5,00 €
Currently not in stock
Naraku
Crankshaft Bearings HD and Oil Seals FKM Naraku Kymco / SYM vertical (GR1)
Article no.: NK104.07

Crankshaft Bearings HD and Oil Seals FKM Naraku Kymco / SYM vertical (GR1)

38,00 €
Currently not in stock
Peugeot
Crankcase left side Peugeot 4-stroke Django / Kisbee after '18
Article no.: OE-PEU803896

Crankcase left side Peugeot 4-stroke Django / Kisbee after '18

440,00 €
Currently not in stock
Peugeot
Crankshaft Peugeot vertical Euro2
Article no.: OE-PEU773483

Crankshaft Peugeot vertical Euro2

366,00 €
Currently not in stock
Yamaha
Crankshaft Minarelli 4-stroke
Article no.: OE-MIN5STE14001200

Crankshaft Minarelli 4-stroke

449,00 €
Currently not in stock
2Fast
Connecting Rod 2Fast 90mm pin 18 x 46mm Passion Minarelli
Article no.: TFAST138

Connecting Rod 2Fast 90mm pin 18 x 46mm Passion Minarelli

190,00 €
Currently not in stock
2Fast
Connecting Rod 2Fast 90mm pin 18 x 40mm Piaggio
Article no.: TFAST137

Connecting Rod 2Fast 90mm pin 18 x 40mm Piaggio

190,00 €
Currently not in stock
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scooter Crankshafts: performance and reliability with every revolution

The crankshaft is a core component of every scooter engine. Its job is to convert the linear motion of the piston into smooth rotational movement and transmit power through the transmission to the rear wheel. In doing so, it is exposed to extreme loads: combustion pressure, permanent friction, high temperatures and high engine speeds. A crankshaft is not a simple component, but is precisely engineered to withstand 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 dies more than increase performance, it is crucial for durability and reliability, especially on tuned 50cc scooters.

In our online store you will find OEM crankshafts for standard replacement as well as sport and racing crankshafts for higher requirements. With a reliable crankshaft, the engine can deliver its full potential, providing stronger performance, more precise throttle response, and confidence in any riding situation.

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

⇒ You can find the right part quickly and easily using our exploded views.

scooter Crankshaft types: features, advantages and Applications

Not all crankshafts are the same. Depending on the engine type, displacement and intended use, there are different product ranges offering the ideal balance between strength, performance, and price. Below is an overview to help you choose the right crankshaft.

✅ OEM crankshaft / standard

⇒ APPLICATION: OEM quality replacement for everyday scooters.

⇒ FEATURES:

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

⇒ ADVANTAGES: Inexpensive and easy to install (plug & play).

⇒ REQUIREMENTS: Replace oil seals and bearings.

⇒ RECOMMENDED Crankshafts: Motoforce, original crankshafts.

✅ Sport and racing crankshaft

⇒ APPLICATION: Everyday to sporty riding style or race track.

⇒ FEATURES:

  • Reinforced crankshaft
  • Webs: Full-circle, with inserts made from different materials
  • Stroke: Original - long
  • Connecting rod: Original / variable
  • Small end bearing: reinforced
  • Balancing: optimized
  • Performance: improved

⇒ ADVANTAGES: Higher reliability, better pre-compression, higher torque.

⇒ REQUIREMENTS: Suitable bearings. If stroke or rod length differs from stock, crankcase modification is required.

⇒ RECOMMENDED Crankshafts: Stage6 HPC MK2, Malossi MHR, Polini For Race.

✅ High-end crankshaft

⇒ APPLICATION: Exclusively for racing use.

⇒ FEATURES:

  • Extremely reinforced crankshaft
  • Crank webs: full circle, made from high-quality steel
  • Stroke: up to 50 mm
  • Connecting rod: reinforced and forged
  • Small end bearings: HQ-reinforced (often silver-plated)
  • Balancing: High precision with inserts to optimize performance (more or less weight affects torque and engine speed)
  • Performance: maximum torque, power and durability

⇒ ADVANTAGES: Superior durability, linear throttle response and high-end performance.

⇒ REQUIREMENTS: Crankcase machining (depending on model), high-end components and bearings, installation by qualified personnel.

⇒ RECOMMENDED crankshafts: Stage6 R/T, 2Fast, Ottopuntouno, Polini PRE.

large Selection: crankshafts, spare parts and complete tuning kits

We stock original crankshafts (Piaggio, Aprilia, Derbi, Vespa, Gilera, Yamaha / MBK, Peugeot, SYM, GY6)as well as affordable aftermarket versions from brands like Motoforce through to exclusive parts for scooter tuning.

When increasing displacement to 70, 88, or 100 cc, the stock crankshaft is usually no longer sufficient. The solution is to upgrade to a reinforced crankshaft or a long-stroke crankshaft capable of handling higher torque and higher RPM reliably. Without a suitable crankshaft, both performance and engine longevity will suffer.

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

Why replace the crankshaft?

A crankshaft operates permanently under extreme conditions: high temperatures, continuous load, and lubrication that is not always ideal. Over time—or due to poor maintenance—it wears out and can fail. When this happens, the damage is often not limited to the crankshaft alone; the cylinder and other critical components can also be affected, resulting in far higher repair costs than a timely crankshaft replacement.

Crankshaft failure is very common on 50cc scooters. In these cases, installing a reinforced crankshaft is highly recommended. For setups with 80, 88, or 100 cc, a long-stroke crankshaft (43–45 mm) is required.

Assembly tips

  • Always use new bearings and seals
  • Check perfect alignment ⇒ prevents vibrations and damage
  • If you have no experience, leave the installation to a specialist or professional workshop

Crankshaft Maintenance and inspection

Each crankshaft type requires proper care to ensure long-term reliability. During regular maintenance work, such as piston replacement, bearing clearances and tolerances should be checked and kept within specified limits.

Pay close attention to unusual noises or vibrations. These are usually the first signs of wear on the crankshaft or bearings. If bearing noise becomes audible or vibrations increase, the engine should be inspected immediately to prevent serious damage.

FAQ - Frequently asked questions about crankshafts

⇒ 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? Crankshaft replacement is a demanding job and requires special tools. If you lack experience, professional installation is strongly recommended. Alternatively, strictly follow the manufacturer’s instructions or an appropriate installation guide.

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