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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
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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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Str8
Chain Guard Rieju MRT
Article no.: STR-730.01

Chain Guard Rieju MRT

20,00 €
In stock
RRP
35,00 €
-43% Discount
Sale
Str8
Chain Guard Beta RR 50 / 125
Article no.: STR-730.02

Chain Guard Beta RR 50 / 125

20,00 €
In stock
RRP
29,50 €
-32% Discount
Sale
Str8
Clutch Cable Holder Derbi STR8 Purple
Article no.: STR-021.03/PU

Clutch Cable Holder Derbi STR8 Purple

4,60 €
In stock
Str8
Clutch Cable Holder Derbi STR8 Red
Article no.: STR-021.03/RE

Clutch Cable Holder Derbi STR8 Red

3,90 €
In stock
RRP
4,50 €
-13% Discount
Str8
Clutch Cable Holder Derbi STR8 Orange
Article no.: STR-021.03/OR

Clutch Cable Holder Derbi STR8 Orange

4,80 €
In stock
Str8
Clutch Cable Holder Derbi STR8 Gold
Article no.: STR-021.03/GO

Clutch Cable Holder Derbi STR8 Gold

4,70 €
In stock
Str8
Clutch Cable Holder Derbi STR8 Neochrome
Article no.: STR-021.03/NC

Clutch Cable Holder Derbi STR8 Neochrome

5,70 €
In stock
Str8
Clutch Cable Holder Derbi STR8 Carbon
Article no.: STR-021.03/CA

Clutch Cable Holder Derbi STR8 Carbon

5,20 €
In stock
Str8
Clutch Cable Holder Derbi STR8 Blue
Article no.: STR-021.03/BL

Clutch Cable Holder Derbi STR8 Blue

5,00 €
In stock
Str8
Clutch Cable Holder Derbi STR8 Alu
Article no.: STR-021.03/SI

Clutch Cable Holder Derbi STR8 Alu

4,70 €
In stock
Voca Racing
Gearbox Bearings Voca Yamaha DT 50 LC Portugal
Article no.: VCR-RD75130.GR

Gearbox Bearings Voca Yamaha DT 50 LC Portugal

35,00 €
In stock
Sale
Voca Racing
Rear Sprocket Yamaha DT 50 LC Portugal 40 teeth - 420 Alu black
Article no.: VCR-SD450.YDT.40/BK

Rear Sprocket Yamaha DT 50 LC Portugal 40 teeth - 420 Alu black

36,00 €
In stock
Sale
Voca Racing
Rear Sprocket Yamaha DT 50 LC Portugal 40 teeth - 420 Alu blue
Article no.: VCR-SD450.YDT.40/BL

Rear Sprocket Yamaha DT 50 LC Portugal 40 teeth - 420 Alu blue

36,00 €
In stock
Sale
Voca Racing
Rear Sprocket Yamaha DT 50 LC Portugal 38 teeth 420 Alu red
Article no.: VCR-SD450.YDT.38/RE

Rear Sprocket Yamaha DT 50 LC Portugal 38 teeth 420 Alu red

35,00 €
In stock
Sale
Voca Racing
Rear Sprocket Yamaha DT 50 LC Portugal 38 teeth - 420 Alu black
Article no.: VCR-SD450.YDT.38/BK

Rear Sprocket Yamaha DT 50 LC Portugal 38 teeth - 420 Alu black

35,00 €
In stock
Sale
Voca Racing
Rear Sprocket Yamaha DT 50 LC Portugal 38 teeth - 420 Alu blue
Article no.: VCR-SD450.YDT.38/BL

Rear Sprocket Yamaha DT 50 LC Portugal 38 teeth - 420 Alu blue

35,00 €
In stock
Sale
Voca Racing
Rear Sprocket Sherco SM-R 50cc 53 teeth - 428 Alu Neochrome
Article no.: VCR-SD450.SHO.53/TI

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

56,50 €
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

54,00 €
In stock
Voca Racing
Rear Sprocket Sherco SM-R 50cc 53 teeth - 428 Alu red
Article no.: VCR-SD450.SHO.53/RE

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

50,00 €
In stock
Sale
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 €
In stock
Voca Racing
Rear Sprocket Sherco SM-R 50cc 50 teeth - 428 Alu red
Article no.: VCR-SD450.SHO.50/RE

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

49,00 €
In stock
Sale
Voca Racing
Rear Sprocket Rieju MRT 50 teeth - 420 Voca Alu red
Article no.: VCR-SD450.MRT.50/RE

Rear Sprocket Rieju MRT 50 teeth - 420 Voca Alu red

44,00 €
In stock
Sale
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 €
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 €
In stock
Voca Racing
Rear Sprocket Rieju MRT 48 teeth - 420 Voca Alu blue
Article no.: VCR-SD450.MRT.48/BL

Rear Sprocket Rieju MRT 48 teeth - 420 Voca Alu blue

42,00 €
In stock
Sale
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

49,00 €
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

44,00 €
In stock
Sale
Voca Racing
Rear Sprocket Beta RR 50 teeth - 420 Voca Alu Neochrome
Article no.: VCR-SD450.BETA.50/TI

Rear Sprocket Beta RR 50 teeth - 420 Voca Alu Neochrome

47,00 €
In stock
Sale
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

45,00 €
In stock
Voca Racing
Rear Sprocket Aprilia SX 50cc 50 teeth - 420 Voca Alu red
Article no.: VCR-SD450.SDA.50/RE

Rear Sprocket Aprilia SX 50cc 50 teeth - 420 Voca Alu red

47,00 €
In stock
Sale
Voca Racing
Rear Sprocket Aprilia SX 50cc 50 teeth - 420 Voca Alu Neochrome
Article no.: VCR-SD450.SDA.50/TI

Rear Sprocket Aprilia SX 50cc 50 teeth - 420 Voca Alu Neochrome

50,00 €
In stock
Sale
Voca Racing
Rear Sprocket Aprilia SX 50cc 50 teeth - 420 Voca Alu blue
Article no.: VCR-SD450.SDA.50/BL

Rear Sprocket Aprilia SX 50cc 50 teeth - 420 Voca Alu blue

47,00 €
In stock
Sale
Voca Racing
Rear Sprocket Aprilia SX 50cc 48 teeth - 420 Voca Alu black
Article no.: VCR-SD450.SDA.48/BK

Rear Sprocket Aprilia SX 50cc 48 teeth - 420 Voca Alu black

50,00 €
In stock
Voca Racing
Rear Sprocket Aprilia SX 50cc 48 teeth - 420 Voca Alu Neochrome
Article no.: VCR-SD450.SDA.48/TI

Rear Sprocket Aprilia SX 50cc 48 teeth - 420 Voca Alu Neochrome

48,00 €
In stock
Sale
Voca Racing
Rear Sprocket Aprilia SX 50cc 48 teeth - 420 Voca Alu blue
Article no.: VCR-SD450.SDA.48/BL

Rear Sprocket Aprilia SX 50cc 48 teeth - 420 Voca Alu blue

45,00 €
In stock
Sale
MotoForce Racing
Front Sprocket 14 teeth 428 MotoForce Racing AM6 Neochrome
Article no.: MF89.00028

Front Sprocket 14 teeth 428 MotoForce Racing AM6 Neochrome

9,00 €
In stock
RRP
10,50 €
-14% Discount
MotoForce Racing
Front Sprocket 14 teeth 420 MotoForce Racing AM6 Neochrome
Article no.: MF89.00025

Front Sprocket 14 teeth 420 MotoForce Racing AM6 Neochrome

9,60 €
In stock
RRP
10,50 €
-9% Discount
MotoForce Racing
Front Sprocket 13 teeth 428 MotoForce Racing AM6 Neochrome
Article no.: MF89.00027

Front Sprocket 13 teeth 428 MotoForce Racing AM6 Neochrome

9,00 €
In stock
RRP
10,50 €
-14% Discount
MotoForce Racing
Front Sprocket 15 teeth - 420 MotoForce Racing Derbi Neochrome
Article no.: MF89.00023

Front Sprocket 15 teeth - 420 MotoForce Racing Derbi Neochrome

9,00 €
In stock
RRP
10,50 €
-14% Discount
MotoForce Racing
Front Sprocket 14 teeth 420 MotoForce Racing Derbi Neochrome
Article no.: MF89.00022

Front Sprocket 14 teeth 420 MotoForce Racing Derbi Neochrome

9,00 €
In stock
RRP
10,50 €
-14% Discount
MotoForce Racing
Front Sprocket 13 teeth 420 MotoForce Racing Derbi Neochrome
Article no.: MF89.00021

Front Sprocket 13 teeth 420 MotoForce Racing Derbi Neochrome

9,00 €
In stock
RRP
10,50 €
-14% Discount
UFO
Swingarm Slider Yamaha YZ 125 / 250 after 2009 blue UFO
Article no.: UF-YA03890#089

Swingarm Slider Yamaha YZ 125 / 250 after 2009 blue UFO

19,00 €
In stock
UFO
Swingarm Slider Yamaha YZ 125 / 250 1993-1996 black UFO
Article no.: UF-YA02862#001

Swingarm Slider Yamaha YZ 125 / 250 1993-1996 black UFO

19,00 €
In stock
Sale
UFO
Chain Slider Yamaha YZ 125 / 250 1989-1992 UFO neutral
Article no.: UF-YA02822#280

Chain Slider Yamaha YZ 125 / 250 1989-1992 UFO neutral

19,00 €
In stock
UFO
Swingarm Slider Yamaha YZ 65 black UFO
Article no.: UF-YA04872#001

Swingarm Slider Yamaha YZ 65 black UFO

20,00 €
In stock
UFO
Chain Slider / Swingarm Slider Set KTM EXC 2012-2023 black UFO
Article no.: UF-KT04036@001

Chain Slider / Swingarm Slider Set KTM EXC 2012-2023 black UFO

29,00 €
In stock
UFO
Swingarm Slider KTM SX / EXC 2007-2010 black UFO
Article no.: UF-KT03099#001

Swingarm Slider KTM SX / EXC 2007-2010 black UFO

19,00 €
In stock
UFO
Swingarm Slider KTM SX 85 after 2015 black UFO
Article no.: UF-KT04058#001

Swingarm Slider KTM SX 85 after 2015 black UFO

19,00 €
In stock
Sale
UFO
Fuel Cap Kawasaki KX 125 / 250 1994-2008 black UFO
Article no.: UF-KA03707@001

Fuel Cap Kawasaki KX 125 / 250 1994-2008 black UFO

18,00 €
In stock
Sale
UFO
Swingarm Slider Kawasaki KX 125 / 250 1992-1996 black
Article no.: UF-KA02752#001

Swingarm Slider Kawasaki KX 125 / 250 1992-1996 black

19,00 €
In stock
UFO
Swingarm Slider Kawasaki KX 125 / 250 1992-1996 neutral
Article no.: UF-KA02751#280

Swingarm Slider Kawasaki KX 125 / 250 1992-1996 neutral

19,00 €
In stock
UFO
Swingarm / Chain Slider Set UFO KTM / Husqvarna 2014-2022 black
Article no.: UF-HU03360@001

Swingarm / Chain Slider Set UFO KTM / Husqvarna 2014-2022 black

29,00 €
In stock
UFO
Swingarm Slider KTM / Husqvarna 2014-2022 black UFO
Article no.: UF-HU03358@001

Swingarm Slider KTM / Husqvarna 2014-2022 black UFO

19,00 €
In stock
UFO
Swingarm Slider Honda CRF 150 after 2007 UFO black
Article no.: UF-HO04627#001

Swingarm Slider Honda CRF 150 after 2007 UFO black

18,00 €
In stock
Sale
UFO
Swingarm Slider Honda CR 125 / 250 1999-2004 UFO black
Article no.: UF-HO03660#001

Swingarm Slider Honda CR 125 / 250 1999-2004 UFO black

19,00 €
In stock
UFO
Chain Slider / Swingarm Slider Set Honda CR 125 / 250 1995-1997 UFO black
Article no.: UF-HO02675#001

Chain Slider / Swingarm Slider Set Honda CR 125 / 250 1995-1997 UFO black

18,50 €
In stock
UFO
Swingarm Slider Yamaha YZ 125 / 250 1993-2001 UFO black
Article no.: UF-YA03809#001

Swingarm Slider Yamaha YZ 125 / 250 1993-2001 UFO black

15,00 €
In stock
Sale
UFO
Swingarm Slider Honda CR 125 / 250 1990-1994 UFO black
Article no.: UF-HO02632#001

Swingarm Slider Honda CR 125 / 250 1990-1994 UFO black

17,00 €
In stock
UFO
Chain Slider / Swingarm Slider GasGas MC / EC 2021-2023 UFO black
Article no.: UF-GG07135@001

Chain Slider / Swingarm Slider GasGas MC / EC 2021-2023 UFO black

27,00 €
In stock
Sale
Polini
Secondary Gears Polini Z=11-46 Piaggio Ciao / Si
Article no.: P202.1427

Secondary Gears Polini Z=11-46 Piaggio Ciao / Si

100,00 €
In stock
RRP
118,00 €
-15% Discount
Sale
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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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