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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 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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Renthal
Rear Sprocket Renthal 520 Z.49 Ultra Light self-cleaning black Kawasaki KX / KXF
Article no.: REN-12110016

Rear Sprocket Renthal 520 Z.49 Ultra Light self-cleaning black Kawasaki KX / KXF

58,50 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.48 Ultra Light self-cleaning black Kawasaki KX / KXF
Article no.: REN-12110015

Rear Sprocket Renthal 520 Z.48 Ultra Light self-cleaning black Kawasaki KX / KXF

58,50 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.48 Twinring black YZ / YZF
Article no.: REN-12101344

Rear Sprocket Renthal 520 Z.48 Twinring black YZ / YZF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.48 Twinring blue YZ / YZF
Article no.: REN-12101343

Rear Sprocket Renthal 520 Z.48 Twinring blue YZ / YZF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.51 Twinring green Kawasaki KX / KXF
Article no.: REN-12101141

Rear Sprocket Renthal 520 Z.51 Twinring green Kawasaki KX / KXF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.50 Twinring green Kawasaki KX / KXF
Article no.: REN-12101140

Rear Sprocket Renthal 520 Z.50 Twinring green Kawasaki KX / KXF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.52 Twinring blue KTM / Husqvarna
Article no.: REN-12101138

Rear Sprocket Renthal 520 Z.52 Twinring blue KTM / Husqvarna

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.50 Twinring blue KTM / Husqvarna
Article no.: REN-12101137

Rear Sprocket Renthal 520 Z.50 Twinring blue KTM / Husqvarna

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.48 Twinring blue KTM / Husqvarna
Article no.: REN-12101136

Rear Sprocket Renthal 520 Z.48 Twinring blue KTM / Husqvarna

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.52 Twinring orange KTM / Husqvarna
Article no.: REN-12100985

Rear Sprocket Renthal 520 Z.52 Twinring orange KTM / Husqvarna

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.50 Twinring orange KTM / Husqvarna
Article no.: REN-12100984

Rear Sprocket Renthal 520 Z.50 Twinring orange KTM / Husqvarna

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.48 Twinring orange KTM / Husqvarna
Article no.: REN-12100983

Rear Sprocket Renthal 520 Z.48 Twinring orange KTM / Husqvarna

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.50 Twinring red CR / CRF
Article no.: REN-12100822

Rear Sprocket Renthal 520 Z.50 Twinring red CR / CRF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.49 Twinring red CR / CRF
Article no.: REN-12100821

Rear Sprocket Renthal 520 Z.49 Twinring red CR / CRF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.48 Twinring red CR / CRF
Article no.: REN-12100820

Rear Sprocket Renthal 520 Z.48 Twinring red CR / CRF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.50 Twinring blue YZ / YZF
Article no.: REN-12100819

Rear Sprocket Renthal 520 Z.50 Twinring blue YZ / YZF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.49 Twinring blue YZ / YZF
Article no.: REN-12100818

Rear Sprocket Renthal 520 Z.49 Twinring blue YZ / YZF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.50 Twinring black KTM / Husqvarna
Article no.: REN-12100816

Rear Sprocket Renthal 520 Z.50 Twinring black KTM / Husqvarna

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.48 Twinring black KTM / Husqvarna
Article no.: REN-12100815

Rear Sprocket Renthal 520 Z.48 Twinring black KTM / Husqvarna

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.51 Twinring black CR / CRF
Article no.: REN-12100814

Rear Sprocket Renthal 520 Z.51 Twinring black CR / CRF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.50 Twinring black CR / CRF
Article no.: REN-12100813

Rear Sprocket Renthal 520 Z.50 Twinring black CR / CRF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.49 Twinring black CR / CRF
Article no.: REN-12100812

Rear Sprocket Renthal 520 Z.49 Twinring black CR / CRF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.48 Twinring black CR / CRF
Article no.: REN-12100811

Rear Sprocket Renthal 520 Z.48 Twinring black CR / CRF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.50 Twinring black YZ / YZF
Article no.: REN-12100810

Rear Sprocket Renthal 520 Z.50 Twinring black YZ / YZF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.49 Twinring black YZ / YZF
Article no.: REN-12100809

Rear Sprocket Renthal 520 Z.49 Twinring black YZ / YZF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.51 Twinring black Kawasaki KX / KXF
Article no.: REN-12100806

Rear Sprocket Renthal 520 Z.51 Twinring black Kawasaki KX / KXF

112,00 €
Ready for dispatch shortly
Renthal
Rear Sprocket Renthal 520 Z.50 Twinring black Kawasaki KX / KXF
Article no.: REN-12100805

Rear Sprocket Renthal 520 Z.50 Twinring black Kawasaki KX / KXF

112,00 €
Ready for dispatch shortly
Scar
Chain Tensioners / Axle blocks Scar aluminium Kawasaki / Suzuki blue
Article no.: SC-17310277

Chain Tensioners / Axle blocks Scar aluminium Kawasaki / Suzuki blue

35,00 €
Ready for dispatch shortly
Scar
Chain Tensioners / Axle Blocks Scar aluminium GasGas red
Article no.: SC-12311484

Chain Tensioners / Axle Blocks Scar aluminium GasGas red

35,00 €
Ready for dispatch shortly
Scar
Chain Tensioners / Axle Blocks Scar aluminium SX / FC / MC blue
Article no.: SC-12310845

Chain Tensioners / Axle Blocks Scar aluminium SX / FC / MC blue

35,00 €
Ready for dispatch shortly
Scar
Chain Tensioners / Axle Blocks Scar aluminium Kawasaki / Suzuki red
Article no.: SC-12310513

Chain Tensioners / Axle Blocks Scar aluminium Kawasaki / Suzuki red

35,00 €
Ready for dispatch shortly
Scar
Chain Tensioners / Axle Blocks Scar aluminium YZF 250 / 450 blue
Article no.: SC-12310511

Chain Tensioners / Axle Blocks Scar aluminium YZF 250 / 450 blue

35,00 €
Ready for dispatch shortly
Standard Parts
Lock Plate shift drum bolt B8. 4-ST DIN 463 Simson
Article no.: MOF-42172

Lock Plate shift drum bolt B8. 4-ST DIN 463 Simson

0,70 €
Ready for dispatch shortly
Standard Parts
Chain Tensioner Set galvanized Simson
Article no.: MOF-41891

Chain Tensioner Set galvanized Simson

3,90 €
Ready for dispatch shortly
Standard Parts
Front Sprocket 18 teeth (old version) Simson
Article no.: MOF-41875

Front Sprocket 18 teeth (old version) Simson

3,40 €
Ready for dispatch shortly
Standard Parts
Chain Case w/ cover Simson
Article no.: MOF-41828

Chain Case w/ cover Simson

15,50 €
Ready for dispatch shortly
Standard Parts
Front Sprocket 16 teeth (old version) Simson
Article no.: MOF-41743

Front Sprocket 16 teeth (old version) Simson

7,00 €
Ready for dispatch shortly
Standard Parts
Front Sprocket 15 teeth (old version) Simson
Article no.: MOF-41742

Front Sprocket 15 teeth (old version) Simson

10,00 €
Ready for dispatch shortly
Standard Parts
Front Sprocket 13 teeth (old version) Simson
Article no.: MOF-41740

Front Sprocket 13 teeth (old version) Simson

11,00 €
Ready for dispatch shortly
Standard Parts
Hollow Shaft gearshift lever Simson
Article no.: MOF-41575

Hollow Shaft gearshift lever Simson

97,50 €
Ready for dispatch shortly
Standard Parts
Gear Shift Shaft Simson
Article no.: MOF-41542

Gear Shift Shaft Simson

21,00 €
Ready for dispatch shortly
Standard Parts
Gear Shift Fork / Bracket Simson
Article no.: MOF-41541

Gear Shift Fork / Bracket Simson

9,10 €
Ready for dispatch shortly
Standard Parts
Lock Plate front sprocket Simson
Article no.: MOF-41538

Lock Plate front sprocket Simson

1,10 €
Ready for dispatch shortly
Standard Parts
Sealing Cap front sprocket Simson
Article no.: MOF-41537

Sealing Cap front sprocket Simson

9,90 €
Ready for dispatch shortly
Standard Parts
Spring output shaft Simson
Article no.: MOF-41515

Spring output shaft Simson

2,50 €
Ready for dispatch shortly
Standard Parts
Washer output shaft spring Simson
Article no.: MOF-41508

Washer output shaft spring Simson

0,80 €
Ready for dispatch shortly
Standard Parts
Ball 7mm output shaft Simson
Article no.: MOF-41493

Ball 7mm output shaft Simson

0,30 €
Ready for dispatch shortly
Standard Parts
Ball 4mm gearshift spring Simson
Article no.: MOF-41492

Ball 4mm gearshift spring Simson

0,60 €
Ready for dispatch shortly
Standard Parts
Bolt shift drum 3- / 4-speed Simson
Article no.: MOF-41468

Bolt shift drum 3- / 4-speed Simson

13,00 €
Ready for dispatch shortly
Standard Parts
Idler Gear 38 teeth 2nd gear 3-speed Simson
Article no.: MOF-41456

Idler Gear 38 teeth 2nd gear 3-speed Simson

18,00 €
Ready for dispatch shortly
Standard Parts
Shift Drum 4-speed Simson
Article no.: MOF-41454

Shift Drum 4-speed Simson

50,00 €
Ready for dispatch shortly
Standard Parts
Spacer Bushing 22 teeth fixed gear clutch shaft 3-speed Simson
Article no.: MOF-41453

Spacer Bushing 22 teeth fixed gear clutch shaft 3-speed Simson

4,60 €
Ready for dispatch shortly
Standard Parts
Shift Drum Washer 12x18x1mm Simson
Article no.: MOF-41445

Shift Drum Washer 12x18x1mm Simson

3,20 €
Ready for dispatch shortly
Standard Parts
Clutch Disc Spring 1.8mm Simson
Article no.: MOF-41443

Clutch Disc Spring 1.8mm Simson

10,50 €
Ready for dispatch shortly
Standard Parts
Spacer Washer 17 / 22 teeth fixed gear 15x22x2mm Simson
Article no.: MOF-41441

Spacer Washer 17 / 22 teeth fixed gear 15x22x2mm Simson

4,20 €
Ready for dispatch shortly
Standard Parts
Washer kickstart shaft 16x32x1.3mm Simson
Article no.: MOF-41440

Washer kickstart shaft 16x32x1.3mm Simson

4,70 €
Ready for dispatch shortly
Standard Parts
Ball Set 7mm x12 output shaft Simson
Article no.: MOF-41439

Ball Set 7mm x12 output shaft Simson

3,60 €
Ready for dispatch shortly
Standard Parts
Washer / Shim gearbox 24x35x1.5mm Simson
Article no.: MOF-41436

Washer / Shim gearbox 24x35x1.5mm Simson

3,90 €
Ready for dispatch shortly
Standard Parts
Clutch Disc Spring 1.5mm Simson
Article no.: MOF-41433

Clutch Disc Spring 1.5mm Simson

11,00 €
Ready for dispatch shortly
Standard Parts
Idler Gear 22 teeth 3rd / 4th gear Simson
Article no.: MOF-41425

Idler Gear 22 teeth 3rd / 4th gear Simson

12,00 €
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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