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Transmission

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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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Moto Master
Rear Sprocket Moto Master 420 aluminium 55 teeth red CR 85 / CRF 150
Article no.: MMAST-12112121

Rear Sprocket Moto Master 420 aluminium 55 teeth red CR 85 / CRF 150

51,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 steel 44 teeth KX /KXF
Article no.: MMAST-12102244

Rear Sprocket Moto Master 520 steel 44 teeth KX /KXF

45,00 €
Currently not in stock
Doppler
Chain Tensioner wheel axle 15mm Doppler Alu CNC red Derbi / Gilera / Aprilia
Article no.: CGN508644

Chain Tensioner wheel axle 15mm Doppler Alu CNC red Derbi / Gilera / Aprilia

25,50 €
Currently not in stock
Doppler
Chain Tensioner wheel axle 15mm Doppler Alu CNC black Derbi / Gilera / Aprilia
Article no.: CGN508645

Chain Tensioner wheel axle 15mm Doppler Alu CNC black Derbi / Gilera / Aprilia

25,50 €
Currently not in stock
Doppler
Chain Tensioner wheel axle 15mm Doppler Alu CNC blue Derbi / Gilera / Aprilia
Article no.: CGN508647

Chain Tensioner wheel axle 15mm Doppler Alu CNC blue Derbi / Gilera / Aprilia

25,50 €
Currently not in stock
Doppler
Chain Tensioner wheel axle 12mm Doppler Alu CNC red Derbi / Gilera / Aprilia
Article no.: CGN508640

Chain Tensioner wheel axle 12mm Doppler Alu CNC red Derbi / Gilera / Aprilia

25,50 €
Currently not in stock
Buzzetti
Chain Tensioner Buzzetti universal Mofa
Article no.: WB-30230

Chain Tensioner Buzzetti universal Mofa

27,00 €
Currently not in stock
Buzzetti
Chain Tensioner Buzzetti Gilera EC1 / Piaggio / Vespa Ciao
Article no.: WB-30429

Chain Tensioner Buzzetti Gilera EC1 / Piaggio / Vespa Ciao

10,50 €
Currently not in stock
Renthal
Chain 520 R1 Works 120 links
Article no.: REN-R1520120

Chain 520 R1 Works 120 links

95,50 €
Currently not in stock
Renthal
Chain R3-3 520 Off Road 118 links
Article no.: REN-12240205

Chain R3-3 520 Off Road 118 links

125,00 €
Currently not in stock
Renthal
Front Sprocket Renthal 520 Z.15 self-cleaning Kawasaki YZ 250 / YZF 450
Article no.: REN-R28952015

Front Sprocket Renthal 520 Z.15 self-cleaning Kawasaki YZ 250 / YZF 450

21,50 €
Currently not in stock
Renthal
Rear Sprocket Renthal 520 Z.51 Ultra Light self-cleaning blue YZ / YZF
Article no.: REN-12110167

Rear Sprocket Renthal 520 Z.51 Ultra Light self-cleaning blue YZ / YZF

58,50 €
Currently not in stock
Renthal
Rear Sprocket Renthal 520 Z.53 Ultra Light self-cleaning KTM / Husqvarna / GasGas
Article no.: REN-12110104

Rear Sprocket Renthal 520 Z.53 Ultra Light self-cleaning KTM / Husqvarna / GasGas

59,00 €
Currently not in stock
Renthal
Rear Sprocket Renthal 520 Z.52 Ultra Light self-cleaning black KTM / Husqvarna / GasGas
Article no.: REN-12110049

Rear Sprocket Renthal 520 Z.52 Ultra Light self-cleaning black KTM / Husqvarna / GasGas

63,00 €
Currently not in stock
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
Chain Tensioner Set galvanized Simson
Article no.: MOF-41891

Chain Tensioner Set galvanized Simson

3,90 €
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
Chain Kit AFAM 16x57 Yamaha TDR 125 1997 - 2002
Article no.: AFAMKS-A-28

Chain Kit AFAM 16x57 Yamaha TDR 125 1997 - 2002

95,50 €
Currently not in stock
AFAM
Chain Kit AFAM 15x39 SYM XS 125 K
Article no.: AFAMKS-A-7

Chain Kit AFAM 15x39 SYM XS 125 K

35,50 €
Currently not in stock
AFAM
Chain Kit AFAM 14x38 Kymco KXR / Maxxer / MXU 250-300
Article no.: AFAMKS-A-90

Chain Kit AFAM 14x38 Kymco KXR / Maxxer / MXU 250-300

83,50 €
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
Chain Kit AFAM 11x53 Generic / Keeway
Article no.: AFAMKS-A-111

Chain Kit AFAM 11x53 Generic / Keeway

43,00 €
Currently not in stock
AFAM
Rear Sprocket steel 60 teeth - 420 Afam Rieju MRT
Article no.: AFAM47103-60

Rear Sprocket steel 60 teeth - 420 Afam Rieju MRT

25,50 €
Currently not in stock
AFAM
Rear Sprocket steel 48 teeth - 428 AFAM Yamaha MT 125 / YS 125 / YZF-R 125
Article no.: AFAM12227-48

Rear Sprocket steel 48 teeth - 428 AFAM Yamaha MT 125 / YS 125 / YZF-R 125

21,50 €
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
Swingarm Slider HQ black Pit Bike YCF SP3 / Bigy
Article no.: YCF-110-1018-04

Swingarm Slider HQ black Pit Bike YCF SP3 / Bigy

48,00 €
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 - 39 teeth - 4 screws YCF Pit Bike
Article no.: MBCA06R.39/COLOR

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

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
Standard Parts
Pedal Shaft Puch Maxi NM
Article no.: MOF-40226

Pedal Shaft Puch Maxi NM

24,00 €
Currently not in stock
Doppler
Chain Kit aluminium Neochrome 14x53 - 420 Doppler Derbi Senda X-treme
Article no.: CGN509942

Chain Kit aluminium Neochrome 14x53 - 420 Doppler Derbi Senda X-treme

109,00 €
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
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 (ET3 / ETS / PK / PK XL / V50)
Article no.: M6716207

Input Shaft Malossi Racing, 10-15-18-20 teeth, Vespa Smallframe (ET3 / ETS / PK / PK XL / V50)

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
Moose Racing
Snap Rings sprocket (x10) Moose Racing KX 65 / 85
Article no.: MR09350492

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

25,50 €
Currently not in stock
Moose Racing
Snap Rings sprocket (x10) Moose Racing KXF 250 / RM 250
Article no.: MR09350491

Snap Rings sprocket (x10) Moose Racing KXF 250 / RM 250

16,00 €
Currently not in stock
Moose Racing
Snap Rings sprocket (x10) Moose Racing RM-Z 450 / KX 500
Article no.: MR09350490

Snap Rings sprocket (x10) Moose Racing RM-Z 450 / KX 500

14,00 €
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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