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Transmission

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Bracket Bushings & Spacers Chain Chain accessories Chain guard Chain guide Chain kit Chain master link Chain roller Chain slider Chain tensioner Circlip Clutch accessories Clutch gear Clutch kit Clutch release lever Clutch springs CVT sliders Fairing Front sprocket Gearbox Gearbox accessories Gearbox bearing kit Gearshift lever Ignition lock Oil seal kit Piston pin bearing Pulley Pulley gear Chain rear sprocket Repair kit Spring Transmission Transmission accessories Transmission gear Washer Wheel axle Woodruff key Bearing ball Cable guide Fuel cap Gear selector shaft Overflow hose Pedal shaft Sprocket screws
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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Renthal
Rear Sprocket Renthal 520 Z.49 Ultra Light self-cleaning black KTM / Husqvarna / GasGas
Article no.: REN-12110046

Rear Sprocket Renthal 520 Z.49 Ultra Light self-cleaning black KTM / Husqvarna / GasGas

58,50 €
Currently not in stock
Standard Parts
Locking Washer primary gear nut Simson
Article no.: MOF-41365

Locking Washer primary gear nut Simson

0,60 €
Currently not in stock
AFAM
Front Sprocket Afam 13 teeth Beta RR LC
Article no.: 1075314001

Front Sprocket Afam 13 teeth Beta RR LC

6,30 €
Currently not in stock
AFAM
Front Sprocket Afam 13 teeth SMS 125
Article no.: 1077127002

Front Sprocket Afam 13 teeth SMS 125

16,50 €
Currently not in stock
AFAM
Front Sprocket Afam 14 teeth XTX 660
Article no.: 1075501001

Front Sprocket Afam 14 teeth XTX 660

19,50 €
Currently not in stock
AFAM
Front Sprocket AFAM 16 teeth 520 KTM 350 / 400 / 620 / 640 / 660 / 690 / 790
Article no.: AFAM73303-16

Front Sprocket AFAM 16 teeth 520 KTM 350 / 400 / 620 / 640 / 660 / 690 / 790

15,00 €
Currently not in stock
AFAM
Front Sprocket AFAM 14 teeth 520 Kymco MXer 150 / MXU 150
Article no.: AFAM76201-14

Front Sprocket AFAM 14 teeth 520 Kymco MXer 150 / MXU 150

11,50 €
Currently not in stock
AFAM
Front Sprocket AFAM 13 teeth 428 Aprilia RS4 / RS / Tuono / RX / SX 125
Article no.: AFAM37200-13

Front Sprocket AFAM 13 teeth 428 Aprilia RS4 / RS / Tuono / RX / SX 125

7,20 €
Currently not in stock
AFAM
Chain Kit AFAM XS-Ring 13x60 Aprilia RS125 after 2011 / Tuono 125 after 2017
Article no.: AFAMKS-A-184

Chain Kit AFAM XS-Ring 13x60 Aprilia RS125 after 2011 / Tuono 125 after 2017

98,00 €
Currently not in stock
AFAM
Chain Kit AFAM 14x49 Yamaha SR 125 1992 - 2002
Article no.: AFAMKS-A-24

Chain Kit AFAM 14x49 Yamaha SR 125 1992 - 2002

45,00 €
Currently not in stock
AFAM
Chain Kit AFAM 13x48 Yamaha DT 1993 - 1997
Article no.: AFAMKS-A-64

Chain Kit AFAM 13x48 Yamaha DT 1993 - 1997

39,50 €
Currently not in stock
AFAM
Chain Kit AFAM 13x38 Honda TRX 250 X
Article no.: AFAMKS-A-11

Chain Kit AFAM 13x38 Honda TRX 250 X

74,50 €
Currently not in stock
AFAM
Rear Sprocket steel 62 teeth - 428 Afam Rieju MRT
Article no.: AFAM47200-62

Rear Sprocket steel 62 teeth - 428 Afam Rieju MRT

36,50 €
Currently not in stock
AFAM
Rear Sprocket steel 60 teeth - 428 Afam Sherco Enduro 50
Article no.: AFAM59104-60

Rear Sprocket steel 60 teeth - 428 Afam Sherco Enduro 50

32,00 €
Currently not in stock
AFAM
Rear Sprocket steel 58 teeth - 428 Afam Rieju MRT
Article no.: AFAM47200-58

Rear Sprocket steel 58 teeth - 428 Afam Rieju MRT

34,00 €
Currently not in stock
AFAM
Rear Sprocket steel 56 teeth - 428 Afam Rieju MRT
Article no.: AFAM47200-56

Rear Sprocket steel 56 teeth - 428 Afam Rieju MRT

33,50 €
Currently not in stock
AFAM
Rear Sprocket steel 53 teeth - 420 Afam Rieju MRT
Article no.: AFAM47103-53

Rear Sprocket steel 53 teeth - 420 Afam Rieju MRT

20,50 €
Currently not in stock
AFAM
Rear Sprocket steel 50 teeth - 428 Afam Rieju MRT
Article no.: AFAM47200-50

Rear Sprocket steel 50 teeth - 428 Afam Rieju MRT

25,50 €
Currently not in stock
AFAM
Chain Rivet Master Link AFAM reinforced gold A420 R1-G
Article no.: AFAM420R1-G

Chain Rivet Master Link AFAM reinforced gold A420 R1-G

2,00 €
Currently not in stock
Moose Racing
RXP Pro-MX 428 Chain Moose Racing
Article no.: MRM57500_MASTER

RXP Pro-MX 428 Chain Moose Racing

from 31,50 €
Currently not in stock
YCF
Chain Tensioners d.15mm Pit Bike YCF Lite
Article no.: YCF-110-1016-01

Chain Tensioners d.15mm Pit Bike YCF Lite

13,00 €
Currently not in stock
YCF
Chain Tensioners d.15mm YCF Pit Bike / Dirt Bike
Article no.: YCF-110-11-09

Chain Tensioners d.15mm YCF Pit Bike / Dirt Bike

16,50 €
Currently not in stock
YCF
Rear Sprocket steel 420 - 41 teeth - 5 screws Pit Bike YCF
Article no.: YCF-110-11-062-41

Rear Sprocket steel 420 - 41 teeth - 5 screws Pit Bike YCF

16,00 €
Currently not in stock
YCF
Rear Sprocket steel 420 - 41 teeth - 4 screws Pit Bike YCF
Article no.: YCF-110-11-06-41

Rear Sprocket steel 420 - 41 teeth - 4 screws Pit Bike YCF

16,00 €
Currently not in stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 45 teeth - 4 screws YCF Pit Bike silver
Article no.: MBCA06R.45SI

Rear Sprocket aluminium CNC 420 - 45 teeth - 4 screws YCF Pit Bike silver

41,50 €
Currently not in stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 39 teeth - 4 screws YCF Pit Bike red
Article no.: MBCA06R.39RD

Rear Sprocket aluminium CNC 420 - 39 teeth - 4 screws YCF Pit Bike red

41,50 €
Currently not in stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 39 teeth - 4 screws YCF Pit Bike blue
Article no.: MBCA06R.39BL

Rear Sprocket aluminium CNC 420 - 39 teeth - 4 screws YCF Pit Bike blue

41,50 €
Currently not in stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 39 teeth - 4 screws YCF Pit Bike silver
Article no.: MBCA06R.39SI

Rear Sprocket aluminium CNC 420 - 39 teeth - 4 screws YCF Pit Bike silver

41,50 €
Currently not in stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 37 teeth - 4 screws YCF Pit Bike black
Article no.: MBCA06R.37BK

Rear Sprocket aluminium CNC 420 - 37 teeth - 4 screws YCF Pit Bike black

41,50 €
Currently not in stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 37 teeth - 4 screws YCF Pit Bike blue
Article no.: MBCA06R.37BL

Rear Sprocket aluminium CNC 420 - 37 teeth - 4 screws YCF Pit Bike blue

41,50 €
Currently not in stock
YCF
Chain Guard Pit Bike YCF 50 cc
Article no.: YCF-50-0600-02

Chain Guard Pit Bike YCF 50 cc

16,50 €
Currently not in stock
Doppler
Rear Sprocket 53 teeth - 420 Doppler Alu CNC Néochrome Aprilia SX 50
Article no.: CGN505504

Rear Sprocket 53 teeth - 420 Doppler Alu CNC Néochrome Aprilia SX 50

69,50 €
Currently not in stock
Doppler
Rear Sprocket 53 teeth - 420 Doppler Alu CNC neochrome Rieju MRT
Article no.: CGN505503

Rear Sprocket 53 teeth - 420 Doppler Alu CNC neochrome Rieju MRT

62,00 €
Currently not in stock
Doppler
Rear Sprocket 53 teeth - 428 Doppler Alu CNC neochrome Sherco Enduro 50
Article no.: CGN505499

Rear Sprocket 53 teeth - 428 Doppler Alu CNC neochrome Sherco Enduro 50

69,50 €
Currently not in stock
Doppler
Chain Kit aluminium black 13x53 - 420 Doppler Beta RR
Article no.: CGN504012

Chain Kit aluminium black 13x53 - 420 Doppler Beta RR

99,00 €
Currently not in stock
Doppler
Chain Kit aluminium red 13x53 - 420 Doppler Beta RR
Article no.: CGN504011

Chain Kit aluminium red 13x53 - 420 Doppler Beta RR

99,00 €
Currently not in stock
Doppler
Chain Kit aluminium red 13x53 - 428 Doppler Sherco 50cc
Article no.: CGN504010

Chain Kit aluminium red 13x53 - 428 Doppler Sherco 50cc

104,00 €
Currently not in stock
Doppler
Chain Kit aluminium black 14x53 - 420 Doppler Derbi GPR / Senda X-treme
Article no.: CGN503782

Chain Kit aluminium black 14x53 - 420 Doppler Derbi GPR / Senda X-treme

95,50 €
Currently not in stock
Malossi
Front Sprocket 17 teeth Malossi Puch Maxi
Article no.: M612499B

Front Sprocket 17 teeth Malossi Puch Maxi

12,00 €
Currently not in stock
Malossi
Input Shaft Malossi Racing 10-15-18-20 teeth Vespa Smallframe
Article no.: M6716207

Input Shaft Malossi Racing 10-15-18-20 teeth Vespa Smallframe

174,00 €
Currently not in stock
Malossi
Input Shaft Malossi Sport, 10-14-17-20 teeth, Vespa Smallframe (ET3 / ETS / PK / PK XL / V50)
Article no.: M6716696

Input Shaft Malossi Sport, 10-14-17-20 teeth, Vespa Smallframe (ET3 / ETS / PK / PK XL / V50)

167,00 €
Currently not in stock
Malossi
Primary Gears Malossi 24/63 Vespa Cosa / PXE 200cc
Article no.: M675235

Primary Gears Malossi 24/63 Vespa Cosa / PXE 200cc

172,00 €
Currently not in stock
Malossi
Primary Gears Malossi 23/64 Vespa Cosa / PX 125cc
Article no.: M673730

Primary Gears Malossi 23/64 Vespa Cosa / PX 125cc

172,00 €
Currently not in stock
Malossi
Secondary Gears Malossi Piaggio Zip 50 4T 15/55
Article no.: M6711135

Secondary Gears Malossi Piaggio Zip 50 4T 15/55

88,00 €
Currently not in stock
Malossi
Secondary Gears Malossi Piaggio Liberty 125 15/47
Article no.: M6711445

Secondary Gears Malossi Piaggio Liberty 125 15/47

66,00 €
Currently not in stock
Malossi
Primary Gears Malossi Malossi Piaggio Ciao
Article no.: M677021

Primary Gears Malossi Malossi Piaggio Ciao

194,00 €
Currently not in stock
Malossi
Primary Gears Malossi 20/72 Aprilia Scar TPSIO 125-150cc
Article no.: M6711539

Primary Gears Malossi 20/72 Aprilia Scar TPSIO 125-150cc

154,00 €
Currently not in stock
Malossi
Primary Gears Malossi 20/46 Aprilia Leonardo 125-150cc
Article no.: M6711360

Primary Gears Malossi 20/46 Aprilia Leonardo 125-150cc

90,00 €
Currently not in stock
Malossi
Primary Gears Malossi HTQ 13/35 Honda Camino
Article no.: MOF-M.676416

Primary Gears Malossi HTQ 13/35 Honda Camino

88,00 €
Currently not in stock
Moose Racing
Chain 428-RXP PRO-MX 96 links gold
Article no.: MRM5750096

Chain 428-RXP PRO-MX 96 links gold

33,50 €
Currently not in stock
Moose Racing
Chain 520-RXP PRO-MX 96 links gold
Article no.: MRM5740096

Chain 520-RXP PRO-MX 96 links gold

73,00 €
Currently not in stock
Moose Racing
Screw / Bolt Kit Rear Sprocket
Article no.: MR24011277

Screw / Bolt Kit Rear Sprocket

11,50 €
Currently not in stock
Moose Racing
Spare Rail for Chain Guide Moose Racing
Article no.: MR12310198

Spare Rail for Chain Guide Moose Racing

18,00 €
Currently not in stock
Moose Racing
Spare Rail for Chain Guide Moose Racing KXF 250 / 450
Article no.: MR12310197

Spare Rail for Chain Guide Moose Racing KXF 250 / 450

17,00 €
Currently not in stock
Moose Racing
Oil Seal Set countershaft Moose Racing YZF 250 after 2014
Article no.: MR09350848

Oil Seal Set countershaft Moose Racing YZF 250 after 2014

27,50 €
Currently not in stock
Moose Racing
Oil Seal Set countershaft Moose Racing TC / SX 125
Article no.: MR09350847

Oil Seal Set countershaft Moose Racing TC / SX 125

26,50 €
Currently not in stock
Moose Racing
Oil Seal Set countershaft Moose Racing KX 500
Article no.: MR09350845

Oil Seal Set countershaft Moose Racing KX 500

30,50 €
Currently not in stock
Moose Racing
Washers starlock sprocket (x10) Moose Racing KXF 450
Article no.: MR09350495

Washers starlock sprocket (x10) Moose Racing KXF 450

35,00 €
Currently not in stock
Moose Racing
Snap Rings sprocket (x10) Moose Racing SX 65 / 85
Article no.: MR09350494

Snap Rings sprocket (x10) Moose Racing SX 65 / 85

26,50 €
Currently not in stock
Moose Racing
Snap Rings sprocket (x10) Moose Racing SX / EXC 125 - 300
Article no.: MR09350493

Snap Rings sprocket (x10) Moose Racing SX / EXC 125 - 300

31,00 €
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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