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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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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

53,50 €
In stock
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

57,00 €
In stock
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

49,50 €
In stock
Voca Racing
Rear Sprocket Aprilia SX 50cc 48 teeth - 420 Voca Alu red
Article no.: VCR-SD450.SDA.48/RE

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

48,00 €
In stock
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

48,00 €
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

54,00 €
In stock
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

48,00 €
In stock
MotoForce Racing
Front Sprocket 15 teeth 420 MotoForce Racing AM6 Neochrome
Article no.: MF89.00026

Front Sprocket 15 teeth 420 MotoForce Racing AM6 Neochrome

11,00 €
In stock
MotoForce Racing
Front Sprocket 14 teeth 428 MotoForce Racing AM6 Neochrome
Article no.: MF89.00028

Front Sprocket 14 teeth 428 MotoForce Racing AM6 Neochrome

9,20 €
In stock
RRP
10,50 €
-12% 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

10,50 €
In stock
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 13 teeth 420 MotoForce Racing AM6 Neochrome
Article no.: MF89.00024

Front Sprocket 13 teeth 420 MotoForce Racing AM6 Neochrome

10,50 €
In stock
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

9,10 €
In stock
RRP
10,50 €
-13% 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

21,00 €
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

21,00 €
In stock
UFO
Swingarm Slider Yamaha YZ 125 / 250 1989-1992 UFO neutral
Article no.: UF-YA02822#280

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

16,50 €
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

25,50 €
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

20,00 €
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

20,00 €
In stock
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

20,00 €
In stock
UFO
Swingarm Slider Kawasaki KX 125 / 250 1992-1996 black
Article no.: UF-KA02752#001

Swingarm Slider Kawasaki KX 125 / 250 1992-1996 black

16,50 €
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

16,50 €
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

31,00 €
In stock
UFO
Swingarm Slider KTM / Husqvarna 2014-2022 black UFO
Article no.: UF-HU03358@001

Swingarm Slider KTM / Husqvarna 2014-2022 black UFO

22,50 €
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

19,50 €
In stock
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

21,00 €
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

17,00 €
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

18,50 €
In stock
UFO
Swingarm Slider KTM SX 85 after 2015 UFO black
Article no.: UF-KT04056#001

Swingarm Slider KTM SX 85 after 2015 UFO black

17,00 €
In stock
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

30,00 €
In stock
Polini
Secondary Gears Polini Z=11-46 Piaggio Ciao / Si
Article no.: P202.1427

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

104,00 €
In stock
Polini
Secondary Gears Polini Z=10-47 Piaggio Ciao / Si
Article no.: P202.1426

Secondary Gears Polini Z=10-47 Piaggio Ciao / Si

104,00 €
In stock
Polini
Primary Gears Polini Z=11-23 Piaggio Ciao / Si
Article no.: P202.1425

Primary Gears Polini Z=11-23 Piaggio Ciao / Si

73,50 €
In stock
Polini
Wheel Axle Revision Kit Polini Piaggio Zip
Article no.: P202.1422

Wheel Axle Revision Kit Polini Piaggio Zip

18,00 €
In stock
Doppler
Chain Guide Doppler Rieju MRT Neochrome
Article no.: CGN520883

Chain Guide Doppler Rieju MRT Neochrome

36,50 €
In stock
Doppler
Chain Guide Doppler Derbi / Aprilia / Gilera Neochrome
Article no.: CGN520884

Chain Guide Doppler Derbi / Aprilia / Gilera Neochrome

36,50 €
In stock
Doppler
Rear Sprocket Doppler 53 teeth - 428 aluminum neochrome Sherco 50
Article no.: CGN517732

Rear Sprocket Doppler 53 teeth - 428 aluminum neochrome Sherco 50

71,00 €
In stock
Doppler
Rear Sprocket steel 53Z - 420 Doppler Origin Peugeot / Rieju
Article no.: CGN509888

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

34,00 €
In stock
Polisport
Swingarm Slider Polisport Beta RR after 2020 black
Article no.: POL-8476200001

Swingarm Slider Polisport Beta RR after 2020 black

14,00 €
In stock
RRP
19,73 €
-29% Discount
Standard Parts
Screw M8x35 galvanized 8.8 (x10)
Article no.: SP-10265

Screw M8x35 galvanized 8.8 (x10)

2,10 €
In stock
Standard Parts
Rear Sprocket IGM Rieju SMX "06 62mm 5 hole 50 teeth
Article no.: SP-87870

Rear Sprocket IGM Rieju SMX "06 62mm 5 hole 50 teeth

15,50 €
In stock
AFAM
Chain Master Link clip for motocross chain AFAM A420MX2G
Article no.: AFAMARA420MX2-G

Chain Master Link clip for motocross chain AFAM A420MX2G

3,80 €
In stock
AFAM
Chain motocross AFAM A420MX2G - clip
Article no.: AFAMA420MX2-G

Chain motocross AFAM A420MX2G - clip

from 39,50 €
In stock
50,00 €
-21% Discount
AFAM
Chain Master Link clip AFAM ARS A428MX-G gold
Article no.: AFAMARSA428MX-G

Chain Master Link clip AFAM ARS A428MX-G gold

5,40 €
In stock
AFAM
Chain motocross AFAM A520MR2G - clip
Article no.: AFAMA520MR2-G

Chain motocross AFAM A520MR2G - clip

from 44,50 €
In stock
45,50 €
-2% Discount
AFAM
Chain motocross AFAM A520XRR3G X-Ring - clip
Article no.: AFAMA520XRR3-G

Chain motocross AFAM A520XRR3G X-Ring - clip

from 98,00 €
In stock
105,00 €
-7% Discount
Standard Parts
Rear Sprocket Premium 66 teeth - 420 black Fantic XM50 /XE50 after 2018
Article no.: IP49519

Rear Sprocket Premium 66 teeth - 420 black Fantic XM50 /XE50 after 2018

50,50 €
In stock
Standard Parts
Rear Sprocket Premium 60 teeth - 420 black Fantic XM50 /XE50 after 2018
Article no.: IP49518

Rear Sprocket Premium 60 teeth - 420 black Fantic XM50 /XE50 after 2018

41,50 €
In stock
Standard Parts
Chain reinforced 134 links D.420 Doppler purple
Article no.: CGN517760

Chain reinforced 134 links D.420 Doppler purple

32,50 €
In stock
Standard Parts
Moped Chain 112 links
Article no.: CGN509804

Moped Chain 112 links

8,00 €
In stock
8,90 €
-10% Discount
Sale
RFX
Chain Tensioners / Axle Blocks RFX Pro yellow Suzuki RM-Z 250 / 450
Article no.: R-FXAB3010099YL

Chain Tensioners / Axle Blocks RFX Pro yellow Suzuki RM-Z 250 / 450

16,00 €
In stock
RRP
31,50 €
-49% Discount
RFX
Chain Roller RFX Race black 34mm KTM 125-525
Article no.: R-FXCR5010055BK

Chain Roller RFX Race black 34mm KTM 125-525

9,70 €
In stock
RFX
Chain Roller RFX Race black 38mm universal
Article no.: R-FXCR1003855BK

Chain Roller RFX Race black 38mm universal

12,00 €
In stock
RFX
Chain Roller RFX Race black 32mm universal
Article no.: R-FXCR1003255BK

Chain Roller RFX Race black 32mm universal

11,00 €
In stock
RFX
Chain Tensioners / Axle Blocks RFX Pro orange KTM SX65
Article no.: R-FXAB5040099OR

Chain Tensioners / Axle Blocks RFX Pro orange KTM SX65

32,00 €
In stock
RFX
Chain Tensioners / Axle Blocks RFX Pro orange KTM
Article no.: R-FXAB5030099OR

Chain Tensioners / Axle Blocks RFX Pro orange KTM

33,00 €
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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