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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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Moto Master
Rear Sprocket Moto Master 428 steel 49 teeth RM / YZ 85
Article no.: MMAST-12102235

Rear Sprocket Moto Master 428 steel 49 teeth RM / YZ 85

45,00 €
Ready for dispatch shortly
Moto Master
Rear Sprocket Moto Master 428 steel 48 teeth RM / YZ 85
Article no.: MMAST-12102234

Rear Sprocket Moto Master 428 steel 48 teeth RM / YZ 85

45,00 €
Ready for dispatch shortly
Moto Master
Rear Sprocket Moto Master 428 steel 47 teeth RM / YZ 85
Article no.: MMAST-12102233

Rear Sprocket Moto Master 428 steel 47 teeth RM / YZ 85

45,00 €
Ready for dispatch shortly
Moto Master
Rear Sprocket Moto Master 428 steel 46 teeth RM / YZ 85
Article no.: MMAST-12102232

Rear Sprocket Moto Master 428 steel 46 teeth RM / YZ 85

45,00 €
Ready for dispatch shortly
Moto Master
Rear Sprocket Moto Master 520 steel 53 teeth RM / RM-Z
Article no.: MMAST-12102231

Rear Sprocket Moto Master 520 steel 53 teeth RM / RM-Z

50,50 €
Ready for dispatch shortly
Moto Master
Rear Sprocket Moto Master 520 steel 52 teeth RM / RM-Z
Article no.: MMAST-12102230

Rear Sprocket Moto Master 520 steel 52 teeth RM / RM-Z

45,00 €
Ready for dispatch shortly
Moto Master
Rear Sprocket Moto Master 520 steel 49 teeth RM / RM-Z
Article no.: MMAST-12102227

Rear Sprocket Moto Master 520 steel 49 teeth RM / RM-Z

45,00 €
Ready for dispatch shortly
Moto Master
Rear Sprocket Moto Master 520 steel 48 teeth RM / RM-Z
Article no.: MMAST-12102226

Rear Sprocket Moto Master 520 steel 48 teeth RM / RM-Z

45,00 €
Ready for dispatch shortly
Moto Master
Rear Sprocket Moto Master 520 steel 47 teeth RM / RM-Z
Article no.: MMAST-12102225

Rear Sprocket Moto Master 520 steel 47 teeth RM / RM-Z

45,00 €
Ready for dispatch shortly
Moto Master
Rear Sprocket Moto Master 520 steel 45 teeth RM / RM-Z
Article no.: MMAST-12102223

Rear Sprocket Moto Master 520 steel 45 teeth RM / RM-Z

45,00 €
Ready for dispatch shortly
Polini
Secondary Transmission Polini 15/48 Derbi Hunter
Article no.: P202.1366

Secondary Transmission Polini 15/48 Derbi Hunter

57,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Yamaha YZF 250
Article no.: HR-OSK0054

Repair Kit gearbox output shaft Hot Rods Yamaha YZF 250

27,00 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Kawasaki KXF 450 2009-2018
Article no.: HR-OSK0053

Repair Kit gearbox output shaft Hot Rods Kawasaki KXF 450 2009-2018

25,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Suzuki DR-Z400
Article no.: HR-OSK0052

Repair Kit gearbox output shaft Hot Rods Suzuki DR-Z400

27,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods KTM SX 65
Article no.: HR-OSK0051

Repair Kit gearbox output shaft Hot Rods KTM SX 65

18,00 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Suzuki RM-Z 450
Article no.: HR-OSK0050

Repair Kit gearbox output shaft Hot Rods Suzuki RM-Z 450

27,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Honda CR 85 / CR 80
Article no.: HR-OSK0048

Repair Kit gearbox output shaft Hot Rods Honda CR 85 / CR 80

9,30 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Yamaha YZF 250 / WRF 250
Article no.: HR-OSK0039

Repair Kit gearbox output shaft Hot Rods Yamaha YZF 250 / WRF 250

25,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Yamaha YZ 250
Article no.: HR-OSK0038

Repair Kit gearbox output shaft Hot Rods Yamaha YZ 250

25,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Yamaha YZ 85 / 125
Article no.: HR-OSK0036

Repair Kit gearbox output shaft Hot Rods Yamaha YZ 85 / 125

21,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Yamaha YZ 80
Article no.: HR-OSK0035

Repair Kit gearbox output shaft Hot Rods Yamaha YZ 80

10,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Suzuki RM80 / 85
Article no.: HR-OSK0033

Repair Kit gearbox output shaft Hot Rods Suzuki RM80 / 85

5,60 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Suzuki RM-Z 250 2007-2012
Article no.: HR-OSK0032

Repair Kit gearbox output shaft Hot Rods Suzuki RM-Z 250 2007-2012

26,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Suzuki RM 250
Article no.: HR-OSK0030

Repair Kit gearbox output shaft Hot Rods Suzuki RM 250

20,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Honda CRF 450 / CR 250
Article no.: HR-OSK0026

Repair Kit gearbox output shaft Hot Rods Honda CRF 450 / CR 250

25,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Kawasaki KX 65
Article no.: HR-OSK0024

Repair Kit gearbox output shaft Hot Rods Kawasaki KX 65

18,00 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Kawasaki KX 85 after 2005
Article no.: HR-OSK0023

Repair Kit gearbox output shaft Hot Rods Kawasaki KX 85 after 2005

19,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Kawasaki KX 125
Article no.: HR-OSK0021

Repair Kit gearbox output shaft Hot Rods Kawasaki KX 125

25,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Kawasaki KX 125
Article no.: HR-OSK0020

Repair Kit gearbox output shaft Hot Rods Kawasaki KX 125

23,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Kawasaki KX 250 2001-2004
Article no.: HR-OSK0019

Repair Kit gearbox output shaft Hot Rods Kawasaki KX 250 2001-2004

26,00 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Kawasaki KX 250 1992-2000
Article no.: HR-OSK0018

Repair Kit gearbox output shaft Hot Rods Kawasaki KX 250 1992-2000

26,00 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Kawasaki KXF 250
Article no.: HR-OSK0016

Repair Kit gearbox output shaft Hot Rods Kawasaki KXF 250

24,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Kawasaki KXF 250 - Suzuki RM-Z 250
Article no.: HR-OSK0015

Repair Kit gearbox output shaft Hot Rods Kawasaki KXF 250 - Suzuki RM-Z 250

23,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Kawasaki KXF 450 2006-2008
Article no.: HR-OSK0013

Repair Kit gearbox output shaft Hot Rods Kawasaki KXF 450 2006-2008

26,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods KTM SX-F 250 / 350
Article no.: HR-OSK0012

Repair Kit gearbox output shaft Hot Rods KTM SX-F 250 / 350

24,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods KTM EXC / SX 250
Article no.: HR-OSK0011

Repair Kit gearbox output shaft Hot Rods KTM EXC / SX 250

20,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods KTM SX 65 / 60
Article no.: HR-OSK0008

Repair Kit gearbox output shaft Hot Rods KTM SX 65 / 60

26,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Honda CR-F150R
Article no.: HR-OSK0007

Repair Kit gearbox output shaft Hot Rods Honda CR-F150R

9,30 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Honda XR 400
Article no.: HR-OSK0006

Repair Kit gearbox output shaft Hot Rods Honda XR 400

9,30 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Honda CR 250 / 500
Article no.: HR-OSK0004

Repair Kit gearbox output shaft Hot Rods Honda CR 250 / 500

23,50 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Honda CR 125 / CRF 250
Article no.: HR-OSK0003

Repair Kit gearbox output shaft Hot Rods Honda CR 125 / CRF 250

18,00 €
Ready for dispatch shortly
Hot Rods
Repair Kit gearbox output shaft Hot Rods Honda CR 125 1986-2003
Article no.: HR-OSK0002

Repair Kit gearbox output shaft Hot Rods Honda CR 125 1986-2003

25,50 €
Ready for dispatch shortly
Buzzetti
Chain Tensioner Buzzetti universal Mofa
Article no.: WB-30230

Chain Tensioner Buzzetti universal Mofa

27,00 €
Ready for dispatch shortly
Buzzetti
Chain Tensioner Buzzetti Gilera EC1 / Piaggio / Vespa Ciao
Article no.: WB-30429

Chain Tensioner Buzzetti Gilera EC1 / Piaggio / Vespa Ciao

10,50 €
Ready for dispatch shortly
Renthal
Chain 520 R1 Works 120 links
Article no.: REN-R1520120

Chain 520 R1 Works 120 links

95,50 €
Ready for dispatch shortly
Renthal
Chain 520 R1 Works 116 links
Article no.: REN-R1520116

Chain 520 R1 Works 116 links

92,00 €
Ready for dispatch shortly
Renthal
Chain R3-3 520 Off Road 102 links
Article no.: REN-12240216

Chain R3-3 520 Off Road 102 links

109,00 €
Ready for dispatch shortly
Renthal
Chain R3-3 520 Off Road 112 links
Article no.: REN-12240208

Chain R3-3 520 Off Road 112 links

119,00 €
Ready for dispatch shortly
Renthal
Chain R3-3 520 Off Road 118 links
Article no.: REN-12240205

Chain R3-3 520 Off Road 118 links

125,00 €
Ready for dispatch shortly
Renthal
Front Sprocket Renthal 520 Z.14 Ultra Light Kawasaki YZ 250 / YZF 450
Article no.: REN-R289U52014

Front Sprocket Renthal 520 Z.14 Ultra Light Kawasaki YZ 250 / YZF 450

28,00 €
Ready for dispatch shortly
Renthal
Front Sprocket Renthal 520 Z.14 self-cleaning Kawasaki YZ 250 / YZF 450
Article no.: REN-R28952014

Front Sprocket Renthal 520 Z.14 self-cleaning Kawasaki YZ 250 / YZF 450

22,50 €
Ready for dispatch shortly
Renthal
Front Sprocket Renthal 420 Z.15 self-cleaning CR 80 / 85
Article no.: REN-R25942015

Front Sprocket Renthal 420 Z.15 self-cleaning CR 80 / 85

21,00 €
Ready for dispatch shortly
Renthal
Front Sprocket Renthal 428 Z.13 self-cleaning RM 85
Article no.: REN-R25842813

Front Sprocket Renthal 428 Z.13 self-cleaning RM 85

21,00 €
Ready for dispatch shortly
Renthal
Front Sprocket Renthal 420 Z.13 self-cleaning KX 65 / 85
Article no.: REN-R25842013

Front Sprocket Renthal 420 Z.13 self-cleaning KX 65 / 85

21,00 €
Ready for dispatch shortly
Renthal
Front Sprocket Renthal 520 Z.13 self-cleaning YZ 125
Article no.: REN-R25752013

Front Sprocket Renthal 520 Z.13 self-cleaning YZ 125

22,50 €
Ready for dispatch shortly
Renthal
Front Sprocket Renthal 520 Z.13 self-cleaning CR 125
Article no.: REN-R25652013

Front Sprocket Renthal 520 Z.13 self-cleaning CR 125

26,50 €
Ready for dispatch shortly
Renthal
Front Sprocket Renthal 520 Z.14 self-cleaning RM 250 / DR-Z 400
Article no.: REN-R25552014

Front Sprocket Renthal 520 Z.14 self-cleaning RM 250 / DR-Z 400

26,50 €
Ready for dispatch shortly
Renthal
Front Sprocket Renthal 520 Z.13 self-cleaning RM 125
Article no.: REN-R25452013

Front Sprocket Renthal 520 Z.13 self-cleaning RM 125

26,50 €
Ready for dispatch shortly
Renthal
Front Sprocket Renthal 520 Z.12 self-cleaning RM 125
Article no.: REN-R25452012

Front Sprocket Renthal 520 Z.12 self-cleaning RM 125

26,50 €
Ready for dispatch shortly
Renthal
Front Sprocket Renthal 520 Z.15 self-cleaning CR 250 / CRF 450
Article no.: REN-R25352015

Front Sprocket Renthal 520 Z.15 self-cleaning CR 250 / CRF 450

26,50 €
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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