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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 Engine cover 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
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AFAM Algi Aprilia Avoc Beta Bidalot 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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AFAM
Chain Kit Aprilia SX 50 2012 - 2017 Afam 11x53 - 420 (original gear ratio)
Article no.: AFAM167783

Chain Kit Aprilia SX 50 2012 - 2017 Afam 11x53 - 420 (original gear ratio)

56,00 €
Ready for dispatch shortly
Standard Parts
Gear Selector Fork primary shaft type AM6 Generic / CPI / KSR
Article no.: MF60.19505

Gear Selector Fork primary shaft type AM6 Generic / CPI / KSR

14,50 €
Ready for dispatch shortly
Standard Parts
Shift Drum with forks and bolts Generic / CPI / KSR
Article no.: MF60.19504

Shift Drum with forks and bolts Generic / CPI / KSR

65,00 €
Ready for dispatch shortly
UFO
Swingarm Slider Yamaha YZF 250 / 450 2004-2005 blue UFO
Article no.: UF-YA03871#089

Swingarm Slider Yamaha YZF 250 / 450 2004-2005 blue UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Yamaha YZF 250 / 450 2004-2005 black UFO
Article no.: UF-YA03871#001

Swingarm Slider Yamaha YZF 250 / 450 2004-2005 black UFO

16,50 €
Ready for dispatch shortly
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

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Yamaha YZ 125 / 250 2003-2008 blue UFO
Article no.: UF-YA03870#089

Swingarm Slider Yamaha YZ 125 / 250 2003-2008 blue UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Yamaha YZ 125 / 250 2003-2008 black UFO
Article no.: UF-YA03870#001

Swingarm Slider Yamaha YZ 125 / 250 2003-2008 black UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Yamaha YZ 125 / 250 1997-2002 blue UFO
Article no.: UF-YA03808#089

Swingarm Slider Yamaha YZ 125 / 250 1997-2002 blue UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Yamaha YZ 125 / 250 1997-2002 black UFO
Article no.: UF-YA03808#001

Swingarm Slider Yamaha YZ 125 / 250 1997-2002 black UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Yamaha YZ 125 / 250 1989-1992 UFO neutral
Article no.: UF-YA02820#280

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

16,50 €
Ready for dispatch shortly
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 €
Ready for dispatch shortly
UFO
Swingarm Slider Yamaha YZ 85 2002-2018 neutral UFO
Article no.: UF-YA03894#280

Swingarm Slider Yamaha YZ 85 2002-2018 neutral UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Yamaha YZ 80 1993-2001 neutral UFO
Article no.: UF-YA03851#280

Swingarm Slider Yamaha YZ 80 1993-2001 neutral UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Suzuki RM-Z 250 / 450 after 2018 yellow UFO
Article no.: UF-SU04945#102

Swingarm Slider Suzuki RM-Z 250 / 450 after 2018 yellow UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Suzuki RM-Z 250 / 450 after 2018 black UFO
Article no.: UF-SU04945#001

Swingarm Slider Suzuki RM-Z 250 / 450 after 2018 black UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Suzuki RM 125 / 250 1989-1995 neutral UFO
Article no.: UF-SU02915#280

Swingarm Slider Suzuki RM 125 / 250 1989-1995 neutral UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Suzuki RM 85 black UFO
Article no.: UF-SU04916#001

Swingarm Slider Suzuki RM 85 black UFO

16,50 €
Ready for dispatch shortly
UFO
Chain Slider / Swingarm Slider Set KTM SX / SXF 2016-2022 orange UFO
Article no.: UF-KT04067@127

Chain Slider / Swingarm Slider Set KTM SX / SXF 2016-2022 orange UFO

25,50 €
Ready for dispatch shortly
UFO
Swingarm Slider KTM SX / SX-F 2011-2022 orange UFO
Article no.: UF-KT04028#127

Swingarm Slider KTM SX / SX-F 2011-2022 orange UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider KTM SX / EXC 2007-2010 orange UFO
Article no.: UF-KT03099#127

Swingarm Slider KTM SX / EXC 2007-2010 orange UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider KTM SX 85 2004-2014 orange UFO
Article no.: UF-KT03068#127

Swingarm Slider KTM SX 85 2004-2014 orange UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider KTM SX 85 2004-2014 black UFO
Article no.: UF-KT03068#001

Swingarm Slider KTM SX 85 2004-2014 black UFO

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider KTM SX 65 2009-2015 black UFO
Article no.: UF-KT04018#001

Swingarm Slider KTM SX 65 2009-2015 black UFO

16,50 €
Ready for dispatch shortly
UFO
Chain Roller inférieure Kawasaki KXF 250 after 2021 black UFO
Article no.: UF-KA04754#001

Chain Roller inférieure Kawasaki KXF 250 after 2021 black UFO

14,50 €
Ready for dispatch shortly
UFO
Chain Roller Kawasaki KXF 250 2006-2008 neutral UFO
Article no.: UF-NY02456#280

Chain Roller Kawasaki KXF 250 2006-2008 neutral UFO

14,50 €
Ready for dispatch shortly
UFO
Chain Roller Kawasaki KXF 250 2006-2008 black UFO
Article no.: UF-NY02456#001

Chain Roller Kawasaki KXF 250 2006-2008 black UFO

14,50 €
Ready for dispatch shortly
UFO
Chain Slider / Swingarm Slider Set Kawasaki KXF 250 / 450 2017-2020 green
Article no.: UF-KA04744@026

Chain Slider / Swingarm Slider Set Kawasaki KXF 250 / 450 2017-2020 green

25,50 €
Ready for dispatch shortly
UFO
Chain Slider / Swingarm Slider Set Kawasaki KXF 250 / 450 2017-2020 black
Article no.: UF-KA04744@001

Chain Slider / Swingarm Slider Set Kawasaki KXF 250 / 450 2017-2020 black

25,50 €
Ready for dispatch shortly
UFO
Chain Slider / Swingarm Slider Set Kawasaki KXF 250 / 450 2009-2016 black
Article no.: UF-KA04710@001

Chain Slider / Swingarm Slider Set Kawasaki KXF 250 / 450 2009-2016 black

25,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Kawasaki KXF 250 / 450 after 2009 UFO green
Article no.: UF-KA04708#026

Swingarm Slider Kawasaki KXF 250 / 450 after 2009 UFO green

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Kawasaki KXF 250 / 450 after 2009 UFO black
Article no.: UF-KA04708#001

Swingarm Slider Kawasaki KXF 250 / 450 after 2009 UFO black

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Kawasaki KXF 250 / 450 2006-2008 UFO black
Article no.: UF-KA03772#001

Swingarm Slider Kawasaki KXF 250 / 450 2006-2008 UFO black

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Kawasaki KX 125 / 250 2003-2008 black
Article no.: UF-KA03750#001

Swingarm Slider Kawasaki KX 125 / 250 2003-2008 black

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Kawasaki KX 85 neutral
Article no.: UF-KA03719#280

Swingarm Slider Kawasaki KX 85 neutral

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider KTM / Husqvarna 2014-2022 black UFO
Article no.: UF-HU03358@001

Swingarm Slider KTM / Husqvarna 2014-2022 black UFO

16,50 €
Ready for dispatch shortly
UFO
Chain Roller Honda CRF 250 2010-2011 red
Article no.: UF-HO04646#070

Chain Roller Honda CRF 250 2010-2011 red

14,50 €
Ready for dispatch shortly
UFO
Chain Roller Honda CRF 250 2010-2011 black
Article no.: UF-HO04646#001

Chain Roller Honda CRF 250 2010-2011 black

14,50 €
Ready for dispatch shortly
UFO
Chain Roller Honda CRF 250 2005-2009 red
Article no.: UF-HO04609#070

Chain Roller Honda CRF 250 2005-2009 red

13,00 €
Ready for dispatch shortly
UFO
Chain Roller Honda CRF 250 2005-2009 black
Article no.: UF-HO04609#001

Chain Roller Honda CRF 250 2005-2009 black

13,00 €
Ready for dispatch shortly
UFO
Chain Roller Honda CRF 250 2004 black
Article no.: UF-HO03699#001

Chain Roller Honda CRF 250 2004 black

13,00 €
Ready for dispatch shortly
UFO
Chain Slider / Swingarm Slider Set Honda CRF 250 / 450 2017-2021 black
Article no.: UF-HO04690@001

Chain Slider / Swingarm Slider Set Honda CRF 250 / 450 2017-2021 black

25,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Honda CR 125 / 250 1999-2004 UFO red
Article no.: UF-HO03660#070

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

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Honda CR 125 / 250 2007 UFO red
Article no.: UF-HO04623#070

Swingarm Slider Honda CR 125 / 250 2007 UFO red

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Honda CR 125 / 250 2005-2006 UFO red
Article no.: UF-HO03691#070

Swingarm Slider Honda CR 125 / 250 2005-2006 UFO red

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Honda CR 125 / 250 2005-2006 UFO black
Article no.: UF-HO03691#001

Swingarm Slider Honda CR 125 / 250 2005-2006 UFO black

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Kawasaki KXF 250 / 450 2009-2016 UFO black
Article no.: UF-KA04709#001

Swingarm Slider Kawasaki KXF 250 / 450 2009-2016 UFO black

17,00 €
Ready for dispatch shortly
UFO
Chain Slider / Swingarm Slider Set Honda CR 125 / 250 1997-1999 UFO black
Article no.: UF-HO03607#001

Chain Slider / Swingarm Slider Set Honda CR 125 / 250 1997-1999 UFO black

17,00 €
Ready for dispatch shortly
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 €
Ready for dispatch shortly
UFO
Swingarm Slider Honda CRF 250 / 450 after 2007 UFO black
Article no.: UF-HO04623#001

Swingarm Slider Honda CRF 250 / 450 after 2007 UFO black

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Kawasaki KX 125 / 250 1997-2002 UFO black
Article no.: UF-KA03708#001

Swingarm Slider Kawasaki KX 125 / 250 1997-2002 UFO black

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Kawasaki KX 125 / 250 1994-2008 UFO black
Article no.: UF-KA03703#001

Swingarm Slider Kawasaki KX 125 / 250 1994-2008 UFO black

17,00 €
Ready for dispatch shortly
UFO
Swingarm Slider KTM SX / EXC 1997-2007 UFO black
Article no.: UF-KT03069#001

Swingarm Slider KTM SX / EXC 1997-2007 UFO black

17,00 €
Ready for dispatch shortly
UFO
Swingarm Slider Yamaha YZF 250 / 450 2009-2023 UFO black
Article no.: UF-YA04806#001

Swingarm Slider Yamaha YZF 250 / 450 2009-2023 UFO black

17,00 €
Ready for dispatch shortly
UFO
Swingarm Slider Honda CR 125 / 250 1990-1998 UFO black
Article no.: UF-HO02662#001

Swingarm Slider Honda CR 125 / 250 1990-1998 UFO black

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Yamaha YZ 125 / 250 after 2009 UFO black
Article no.: UF-YA03890#001

Swingarm Slider Yamaha YZ 125 / 250 after 2009 UFO black

16,50 €
Ready for dispatch shortly
UFO
Swingarm Slider Yamaha YZ 125 / 250 after 2005 UFO black
Article no.: UF-YA03876#001

Swingarm Slider Yamaha YZ 125 / 250 after 2005 UFO black

17,00 €
Ready for dispatch shortly
UFO
Swingarm Slider Honda CR / CRF 2000-2009 UFO black
Article no.: UF-HO03671#001

Swingarm Slider Honda CR / CRF 2000-2009 UFO black

17,00 €
Ready for dispatch shortly
UFO
Swingarm Slider Kawasaki KX 250 / 450 after 2019 UFO black
Article no.: UF-KA04755#001

Swingarm Slider Kawasaki KX 250 / 450 after 2019 UFO black

17,00 €
Ready for dispatch shortly
UFO
Swingarm Slider KTM SX / SX-F 2019-2022 black
Article no.: UF-KT04028#001

Swingarm Slider KTM SX / SX-F 2019-2022 black

16,50 €
Ready for dispatch shortly
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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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