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Transmission

(3001 products)
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Axle other Chain Chain accessories Chain guard Chain guide Chain kit Chain master link Chain roller Chain slider Chain tensioner Chassis screws Circlip Clutch accessories Clutch kit Crankshaft accessories CVT sliders Engine case accessories Fairing Front sprocket Gearbox Gearbox accessories Gearbox bearing kit Gearshift lever Ignition lock Kickstarter accessories Oil seal kit Piston pin bearing Pulley Pulley gear Chain rear sprocket Repair kit Screw kit Screws other Tank accessories Transmission Transmission accessories Transmission gear Washer Wheel axle Woodruff key
Brand
AFAM Algi Aprilia Avoc Beta Buzzetti Conti CPI D.I.D Derbi Doppler GY6 Hot Rods IGM Iris Italjet Jasil KMC KRM Kymco Malossi Moose Racing Moto Master MotoForce MotoForce Racing Peugeot Piaggio Polini Polisport Pro Circuit Prox Renthal RFX Rieju RMS Scar Schmitt Stage6 Stage6 R/T Standard Parts STR8 Swiing Top Performances UFO Voca Racing Volt Racing Yamaha YCF YCF Factory
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Moose Racing
Rear Sprocket aluminium 520 Moose Racing Beta RR 42 teeth red
Article no.: MR12111859

Rear Sprocket aluminium 520 Moose Racing Beta RR 42 teeth red

39,50 €
Currently not in stock
Doppler
Chain Guide Doppler blue Derbi / Aprilia / Gilera
Article no.: CGN505688

Chain Guide Doppler blue Derbi / Aprilia / Gilera

34,00 €
Currently not in stock
Doppler
Chain Master Link reinforced 420 Doppler gold
Article no.: CGN504541

Chain Master Link reinforced 420 Doppler gold

3,20 €
Currently not in stock
Top Performances
Secondary Gear Shaft Top Performances Minarelli AM6 V2
Article no.: TAM00037

Secondary Gear Shaft Top Performances Minarelli AM6 V2

50,50 €
Currently not in stock
Top Performances
Gearwheel 3rd gear secondary shaft Top Performances T29 AM6 V2
Article no.: TAM00012

Gearwheel 3rd gear secondary shaft Top Performances T29 AM6 V2

28,50 €
Currently not in stock
Jasil
Gearbox complete Top Racing AM6
Article no.: JA6250004

Gearbox complete Top Racing AM6

419,00 €
Currently not in stock
Standard Parts
Chain Roller 10mm - black Pit Bike / Dirt Bike
Article no.: MB7511

Chain Roller 10mm - black Pit Bike / Dirt Bike

5,60 €
Currently not in stock
Standard Parts
Front Sprocket Retainer d.20mm Pit Bike
Article no.: MB3342

Front Sprocket Retainer d.20mm Pit Bike

2,60 €
Currently not in stock
Standard Parts
Front Sprocket Retainer d.17mm Pit Bike
Article no.: MB2511

Front Sprocket Retainer d.17mm Pit Bike

2,60 €
Currently not in stock
Standard Parts
Gear Selector Fork 125cc / 140cc / 149cc YX (CRF)
Article no.: MB3117

Gear Selector Fork 125cc / 140cc / 149cc YX (CRF)

51,00 €
Currently not in stock
Top Performances
Transmission / Gearbox Top Performances 2nd series Minarelli AM6
Article no.: TAM00031

Transmission / Gearbox Top Performances 2nd series Minarelli AM6

234,00 €
Currently not in stock
Doppler
Chain reinforced 138 links D.428 orange
Article no.: CGN503983

Chain reinforced 138 links D.428 orange

31,00 €
Currently not in stock
Doppler
Chain reinforced 138 links D.428 red
Article no.: CGN503981

Chain reinforced 138 links D.428 red

31,00 €
Currently not in stock
AFAM
Chain reinforced Racing 134 links 420 gold
Article no.: AFAM485374

Chain reinforced Racing 134 links 420 gold

42,00 €
Currently not in stock
Doppler
Chain reinforced 134 links D.420 Doppler chrome
Article no.: CGN501121

Chain reinforced 134 links D.420 Doppler chrome

30,50 €
Currently not in stock
Doppler
Chain reinforced 134 links D.420 Doppler gold
Article no.: CGN501122

Chain reinforced 134 links D.420 Doppler gold

25,00 €
Currently not in stock
Doppler
Front Sprocket Cover / Chain Guard aluminium silver Doppler Minarelli AM6
Article no.: CGN497436

Front Sprocket Cover / Chain Guard aluminium silver Doppler Minarelli AM6

20,00 €
Currently not in stock
AFAM
Chain Kit Afam 11x62 - 420 CPI SM
Article no.: AFAM106

Chain Kit Afam 11x62 - 420 CPI SM

65,50 €
Currently not in stock
Standard Parts
Front Sprocket 12 teeth 420 Derbi Euro2 before 1999
Article no.: L-SA5521

Front Sprocket 12 teeth 420 Derbi Euro2 before 1999

8,00 €
Currently not in stock
Derbi
Chain Guard Derbi Senda DRD Pro / X-Treme
Article no.: OE-DE00H01508181

Chain Guard Derbi Senda DRD Pro / X-Treme

35,00 €
Currently not in stock
Piaggio
Bleeder Tube gear box Piaggio / Vespa
Article no.: OE-PIACM162202

Bleeder Tube gear box Piaggio / Vespa

17,50 €
Currently not in stock
Polisport
Roller for chain tensioner Polisport d.42mm black
Article no.: EKP-143574

Roller for chain tensioner Polisport d.42mm black

14,00 €
Currently not in stock
Derbi
Swingarm Slider Derbi Senda / Gilera SMT
Article no.: OE-DE00H01803331

Swingarm Slider Derbi Senda / Gilera SMT

25,50 €
Currently not in stock
RMS
Output shaft type A, B, Piaggio old engine, with nut, cap, split-pin (Ref. 100240090)
Article no.: R100240090

Output shaft type A, B, Piaggio old engine, with nut, cap, split-pin (Ref. 100240090)

38,00 €
Currently not in stock
Aprilia
Belleville Spring for intermediate shaft Minarelli, 14x29x0.2mm
Article no.: OE-AP8206150

Belleville Spring for intermediate shaft Minarelli, 14x29x0.2mm

4,30 €
Currently not in stock
Standard Parts
Chain Master Link chain 428, reinforced, gold
Article no.: L-SA485376

Chain Master Link chain 428, reinforced, gold

3,40 €
Currently not in stock
Doppler
Chain Kit aluminium gold 13x53 - 420 Doppler Rieju MRT
Article no.: CGN491213
5

Chain Kit aluminium gold 13x53 - 420 Doppler Rieju MRT

99,00 €
Currently not in stock
Standard Parts
Rear Sprocket 56 teeth Peugeot 103 SPX / RCX (Grimeca rims d.98mm)
Article no.: CGN2954

Rear Sprocket 56 teeth Peugeot 103 SPX / RCX (Grimeca rims d.98mm)

19,50 €
Currently not in stock
Standard Parts
Rear Sprocket 45 teeth Peugeot 103 SPX / RCX (Grimeca rims d.98mm)
Article no.: CGN2949

Rear Sprocket 45 teeth Peugeot 103 SPX / RCX (Grimeca rims d.98mm)

13,50 €
Currently not in stock
Doppler
Primary Gears Doppler 14-42 Yamaha Aerox / BW's
Article no.: CGN263880
1

Primary Gears Doppler 14-42 Yamaha Aerox / BW's

69,00 €
Currently not in stock
AFAM
Chain Kit AFAM 14x53 Derbi Senda X-treme
Article no.: CGN467429
4

Chain Kit AFAM 14x53 Derbi Senda X-treme

64,50 €
Currently not in stock
Top Performances
Gearbox Washers and Circlips AM6 (1st series)
Article no.: T9935030

Gearbox Washers and Circlips AM6 (1st series)

15,50 €
Currently not in stock
Top Performances
Gear Selector Fork Set forged Top Performances AM6
Article no.: TAM00046

Gear Selector Fork Set forged Top Performances AM6

77,00 €
Currently not in stock
Voca Racing
Rear Sprocket Sherco SM-R 50cc 53 teeth - 428 Alu blue
Article no.: VCR-SD450.SHO.53/BL

Rear Sprocket Sherco SM-R 50cc 53 teeth - 428 Alu blue

53,50 €
Currently not in stock
Voca Racing
Rear Sprocket Sherco SM-R 50cc 53 teeth - 428 Alu black
Article no.: VCR-SD450.SHO.53/BK

Rear Sprocket Sherco SM-R 50cc 53 teeth - 428 Alu black

55,00 €
Currently not in stock
Voca Racing
Rear Sprocket Sherco SM-R 50cc 50 teeth - 428 Alu black
Article no.: VCR-SD450.SHO.50/BK

Rear Sprocket Sherco SM-R 50cc 50 teeth - 428 Alu black

52,50 €
Currently not in stock
Voca Racing
Rear Sprocket Rieju MRT 50 teeth - 420 Voca Alu black
Article no.: VCR-SD450.MRT.50/BK

Rear Sprocket Rieju MRT 50 teeth - 420 Voca Alu black

49,00 €
Currently not in stock
Voca Racing
Rear Sprocket Rieju MRT 50 teeth - 420 Voca Alu Neochrome
Article no.: VCR-SD450.MRT.50/TI

Rear Sprocket Rieju MRT 50 teeth - 420 Voca Alu Neochrome

49,50 €
Currently not in stock
Voca Racing
Rear Sprocket Rieju MRT 48 teeth - 420 Voca Alu red
Article no.: VCR-SD450.MRT.48/RE

Rear Sprocket Rieju MRT 48 teeth - 420 Voca Alu red

45,00 €
Currently not in stock
Voca Racing
Rear Sprocket Rieju MRT 48 teeth - 420 Voca Alu black
Article no.: VCR-SD450.MRT.48/BK

Rear Sprocket Rieju MRT 48 teeth - 420 Voca Alu black

45,00 €
Currently not in stock
Voca Racing
Rear Sprocket Rieju MRT 48 teeth - 420 Voca Alu Neochrome
Article no.: VCR-SD450.MRT.48/TI

Rear Sprocket Rieju MRT 48 teeth - 420 Voca Alu Neochrome

48,50 €
Currently not in stock
Voca Racing
Rear Sprocket Beta RR 50 teeth - 420 Voca Alu red
Article no.: VCR-SD450.BETA.50/RE

Rear Sprocket Beta RR 50 teeth - 420 Voca Alu red

48,00 €
Currently not in stock
Voca Racing
Rear Sprocket Beta RR 50 teeth - 420 Voca Alu black
Article no.: VCR-SD450.BETA.50/BK

Rear Sprocket Beta RR 50 teeth - 420 Voca Alu black

48,00 €
Currently not in stock
Voca Racing
Rear Sprocket Beta RR 48 teeth - 420 Voca Alu red
Article no.: VCR-SD450.BETA.48/RE

Rear Sprocket Beta RR 48 teeth - 420 Voca Alu red

43,00 €
Currently not in stock
Voca Racing
Rear Sprocket Beta RR 48 teeth - 420 Voca Alu black
Article no.: VCR-SD450.BETA.48/BK

Rear Sprocket Beta RR 48 teeth - 420 Voca Alu black

44,00 €
Currently not in stock
Voca Racing
Rear Sprocket Beta RR 48 teeth - 420 Voca Alu Neochrome
Article no.: VCR-SD450.BETA.48/TI

Rear Sprocket Beta RR 48 teeth - 420 Voca Alu Neochrome

45,00 €
Currently not in stock
UFO
Swingarm Slider Yamaha YZ 85 2002-2018 black UFO
Article no.: UF-YA03894#001

Swingarm Slider Yamaha YZ 85 2002-2018 black UFO

16,50 €
Currently not in stock
AFAM
Chain Kit Rieju MRT after 2018 Afam 11x62
Article no.: CGN518452

Chain Kit Rieju MRT after 2018 Afam 11x62

74,00 €
Currently not in stock
Doppler
Chain Guide Doppler Derbi / Aprilia / Gilera Neochrome
Article no.: CGN520884

Chain Guide Doppler Derbi / Aprilia / Gilera Neochrome

34,00 €
Currently not in stock
Doppler
Rear Sprocket steel 53Z - 420 Doppler Origin Peugeot / Rieju
Article no.: CGN509888

Rear Sprocket steel 53Z - 420 Doppler Origin Peugeot / Rieju

32,50 €
Currently not in stock
RFX
Chain Roller RFX Race green 38mm Kawasaki KXF 250 / 450
Article no.: R-FXCR2010055GN

Chain Roller RFX Race green 38mm Kawasaki KXF 250 / 450

12,00 €
Currently not in stock
RMS
Freewheel Sprocket 16 teeth Piaggio Ciao
Article no.: R525260120

Freewheel Sprocket 16 teeth Piaggio Ciao

4,80 €
Currently not in stock
Voca Racing
Gearbox Voca Racing Minarelli AM6
Article no.: VCR-RD77188.CC

Gearbox Voca Racing Minarelli AM6

475,00 €
Currently not in stock
RRP
534,00 €
-11% Discount
Doppler
Chain Kit steel 14x53 - 420 Doppler Origin Derbi Senda DRD
Article no.: CGN515040

Chain Kit steel 14x53 - 420 Doppler Origin Derbi Senda DRD

79,00 €
Currently not in stock
Polini
Secondary Gears Polini 15/39 Honda SH 125/150i before 2012
Article no.: P202.1408

Secondary Gears Polini 15/39 Honda SH 125/150i before 2012

115,00 €
Currently not in stock
Conti
Rear Sprocket bimetal red 53 teeth - 428 Conti CHR Beta RR
Article no.: CGN513620

Rear Sprocket bimetal red 53 teeth - 428 Conti CHR Beta RR

71,00 €
Currently not in stock
Standard Parts
Rear Sprocket steel 52 teeth - 420 CPI SX / SM
Article no.: MF89.00371

Rear Sprocket steel 52 teeth - 420 CPI SX / SM

25,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 45 teeth blue YZ / YZF
Article no.: MMAST-12112306

Rear Sprocket Moto Master 520 aluminium 45 teeth blue YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 48 teeth black YZ / YZF
Article no.: MMAST-12112296

Rear Sprocket Moto Master 520 aluminium 48 teeth black YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 45 teeth blue KTM / Husqvarna
Article no.: MMAST-12112213

Rear Sprocket Moto Master 520 aluminium 45 teeth blue KTM / Husqvarna

54,00 €
Currently not in stock
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The gearbox - tuning via gear ratio

The gearbox or transmission is a mechanical device that transmits a motion from one part to another, with the possibility of changing speed and torque by gearing up or gearing down. In a scooter, there is the primary transmission (input shaft to torque drive + intermediate shaft) and secondary transmission (intermediate shaft + output shaft to wheel). The gear ratio has a great impact on acceleration and top speed. A short gear ratio gives good acceleration, but is a little weak on speed, which can be compensated by a longer gear ratio.

Since the gearbox is a very complex subject, here we have a gearbox tutorial for you that will help you choose your new gear ratio.

The complex world of gear ratios

Do you simply want to replace gearbox components because they are defective or worn? Or do you want to adjust the gear ratio after upgrading to a more powerful cylinder? In both cases, we recommend replacing both primary and secondary gears at the same time.

For very powerful engines, we recommend selecting the gears in a way that the final drive ratio can adequately convert the power delivered by the engine. Using a longer gear ratio may actually worsen acceleration, so you should always match the gearbox to the available RPM. Longer does not always mean better, it is best to get enough information before installing new gears!

In our online store we carry a wide range of individual gears and complete gearboxess for most scooters, mopeds and maxi scooters. Leading brands such as

offer top quality products at fair prices, with which you can improve the performance of your engine.

If you simply want to overhaul your gearbox, we also carry original spare parts for you, for manufacturers like

and many more.

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