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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 Master Link rivet for motocross chain AFAM A428MXG
Article no.: AFAMMRA428MX-G

Chain Master Link rivet for motocross chain AFAM A428MXG

5,40 €
Ready for dispatch shortly
AFAM
Chain motocross AFAM A428MXG - clip
Article no.: AFAMA428MX-G

Chain motocross AFAM A428MXG - clip

from 56,00 €
Ready for dispatch shortly
58,00 €
-3% Discount
AFAM
Chain Master Link rivet for motocross chain AFAM A520XRR3G Xs-Ring
Article no.: AF450524

Chain Master Link rivet for motocross chain AFAM A520XRR3G Xs-Ring

6,90 €
Ready for dispatch shortly
AFAM
Chain Master Link clip for motocross chain AFAM A520MR2G
Article no.: AFAMARA520MR2-G

Chain Master Link clip for motocross chain AFAM A520MR2G

3,50 €
Ready for dispatch shortly
AFAM
Chain Master Link rivet for motocross chain AFAM A520MR2G
Article no.: AFAMMRA520MR2-G

Chain Master Link rivet for motocross chain AFAM A520MR2G

2,90 €
Ready for dispatch shortly
UFO
Swingarm Slider UFO KTM SX / SX-F 2023 orange
Article no.: UF-KT05018127

Swingarm Slider UFO KTM SX / SX-F 2023 orange

19,00 €
Ready for dispatch shortly
RRP
19,29 €
-2% Discount
UFO
Swingarm Slider UFO KTM SX / SX-F 2023 black
Article no.: UF-KT05018001

Swingarm Slider UFO KTM SX / SX-F 2023 black

19,00 €
Ready for dispatch shortly
RRP
19,29 €
-2% Discount
UFO
Chain Slider / Swingarm Slider Set UFO KTM SX / SX-F 2023 orange
Article no.: UF-KT05019127

Chain Slider / Swingarm Slider Set UFO KTM SX / SX-F 2023 orange

35,00 €
Ready for dispatch shortly
RRP
35,71 €
-2% Discount
UFO
Swingarm Slider UFO KTM SX/SX-F 2023
Article no.: UF-KT05017001

Swingarm Slider UFO KTM SX/SX-F 2023

23,00 €
Ready for dispatch shortly
RRP
23,16 €
-1% Discount
RFX
Chain Tensioners / Axle Blocks RFX Pro orange KTM 50
Article no.: R-FXAB5000099OR

Chain Tensioners / Axle Blocks RFX Pro orange KTM 50

33,00 €
Ready for dispatch shortly
RFX
Chain Tensioners / Axle Blocks RFX Pro blue Yamaha YZF 250 / 450
Article no.: R-FXAB4030099BU

Chain Tensioners / Axle Blocks RFX Pro blue Yamaha YZF 250 / 450

31,50 €
Ready for dispatch shortly
RFX
Chain Tensioners / Axle Blocks RFX Pro blue YZ / YZF before 2008
Article no.: R-FXAB4010099BU

Chain Tensioners / Axle Blocks RFX Pro blue YZ / YZF before 2008

31,50 €
Ready for dispatch shortly
RFX
Chain Tensioners / Axle Blocks RFX Pro green KX / KXF
Article no.: R-FXAB2010099GN

Chain Tensioners / Axle Blocks RFX Pro green KX / KXF

31,50 €
Ready for dispatch shortly
RFX
Chain Tensioners / Axle Blocks RFX Pro red Honda CRF 150
Article no.: R-FXAB1030099RD

Chain Tensioners / Axle Blocks RFX Pro red Honda CRF 150

31,50 €
Ready for dispatch shortly
RFX
Chain Tensioners / Axle Blocks RFX Pro red Honda CRF 250 / 450
Article no.: R-FXAB1020099RD

Chain Tensioners / Axle Blocks RFX Pro red Honda CRF 250 / 450

31,50 €
Ready for dispatch shortly
RFX
Chain Tensioners / Axle Blocks RFX Pro blue Husqvarna TC85
Article no.: R-FXAB7050099BU

Chain Tensioners / Axle Blocks RFX Pro blue Husqvarna TC85

31,50 €
Ready for dispatch shortly
RFX
Chain Tensioners / Axle Blocks RFX Pro blue Husqvarna TC65
Article no.: R-FXAB7040099BU

Chain Tensioners / Axle Blocks RFX Pro blue Husqvarna TC65

32,00 €
Ready for dispatch shortly
RFX
Chain Roller RFX Race black 38mm Honda CRF 250 / 450
Article no.: R-FXCR1020055BK

Chain Roller RFX Race black 38mm Honda CRF 250 / 450

12,00 €
Ready for dispatch shortly
RFX
Chain Roller RFX Race red 34mm
Article no.: R-FXCR1010055RD

Chain Roller RFX Race red 34mm

9,70 €
Ready for dispatch shortly
RFX
Chain Roller RFX Race black 34mm
Article no.: R-FXCR1010055BK

Chain Roller RFX Race black 34mm

9,70 €
Ready for dispatch shortly
RFX
Chain Roller RFX Race red 38mm universal
Article no.: R-FXCR1003855RD

Chain Roller RFX Race red 38mm universal

12,00 €
Ready for dispatch shortly
RFX
Chain Roller RFX Race blue 38mm universal
Article no.: R-FXCR1003855BU

Chain Roller RFX Race blue 38mm universal

12,00 €
Ready for dispatch shortly
RFX
Chain Tensioners / Axle Blocks RFX Pro blue
Article no.: R-FXAB7030099BU

Chain Tensioners / Axle Blocks RFX Pro blue

33,00 €
Ready for dispatch shortly
RFX
Chain Roller RFX Race red 32mm universal
Article no.: R-FXCR1003255RD

Chain Roller RFX Race red 32mm universal

9,70 €
Ready for dispatch shortly
RFX
Chain Roller RFX Race blue 32mm universal
Article no.: R-FXCR1003255BU

Chain Roller RFX Race blue 32mm universal

9,70 €
Ready for dispatch shortly
RFX
Chain Tensioners / Axle Blocks RFX Pro blue Sherco SE / SE-F after 2014
Article no.: R-FXAB6010099BU

Chain Tensioners / Axle Blocks RFX Pro blue Sherco SE / SE-F after 2014

31,50 €
Ready for dispatch shortly
RFX
Chain Tensioners / Axle Blocks RFX Pro red CR / CRF after 2002
Article no.: R-FXAB1010099RD

Chain Tensioners / Axle Blocks RFX Pro red CR / CRF after 2002

31,50 €
Ready for dispatch shortly
Standard Parts
Rear Sprocket / Driver 51 teeth Simson
Article no.: MOF-42933

Rear Sprocket / Driver 51 teeth Simson

240,00 €
Ready for dispatch shortly
Standard Parts
Idle Gear 40 teeth 2nd gear / 4-speed gear Simson
Article no.: MOF-41419

Idle Gear 40 teeth 2nd gear / 4-speed gear Simson

21,50 €
Ready for dispatch shortly
Standard Parts
Front Sprocket old version 11 teeth Simson
Article no.: MOF-41738

Front Sprocket old version 11 teeth Simson

9,70 €
Ready for dispatch shortly
Standard Parts
Gear Wheel 38 teeth Simson
Article no.: MOF-41610

Gear Wheel 38 teeth Simson

44,00 €
Ready for dispatch shortly
Standard Parts
Chain Drive 14 parts Simson
Article no.: MOF-44479

Chain Drive 14 parts Simson

92,00 €
Ready for dispatch shortly
Standard Parts
Chain Drive 14 parts Simson
Article no.: MOF-43937

Chain Drive 14 parts Simson

98,50 €
Ready for dispatch shortly
Standard Parts
Chain Drive 14 parts Simson
Article no.: MOF-43938

Chain Drive 14 parts Simson

82,00 €
Ready for dispatch shortly
Standard Parts
Driver Set elastic Puch ZA50 gearbox
Article no.: MOF-43795

Driver Set elastic Puch ZA50 gearbox

35,00 €
Ready for dispatch shortly
Standard Parts
Gear Selector Shaft Simson
Article no.: MOF-41556

Gear Selector Shaft Simson

31,50 €
Ready for dispatch shortly
Swiing
Gearshift Shaft swiing Puch Z50
Article no.: MOF-43805

Gearshift Shaft swiing Puch Z50

21,00 €
Ready for dispatch shortly
Doppler
Chain Kit steel 14x53 - 420 Doppler Origin Derbi Senda DRD
Article no.: CGN515040

Chain Kit steel 14x53 - 420 Doppler Origin Derbi Senda DRD

79,00 €
Ready for dispatch shortly
Standard Parts
Chain Tensioner M7x1.00 - L.65mm MBK 51 (x1)
Article no.: CGN517090

Chain Tensioner M7x1.00 - L.65mm MBK 51 (x1)

3,90 €
Ready for dispatch shortly
Polini
Secondary Gears Polini 14/43 Vespa 50 IGET Euro 5
Article no.: P202.1424

Secondary Gears Polini 14/43 Vespa 50 IGET Euro 5

89,50 €
Ready for dispatch shortly
Polini
Primary Gears Polini 18/69 Aprilia Scarabeo 125 / 150 Rotax
Article no.: P202.1377

Primary Gears Polini 18/69 Aprilia Scarabeo 125 / 150 Rotax

116,00 €
Ready for dispatch shortly
Pro Circuit
Chain Tensioners / Axle Blocks Pro Circuit red CRF 2009-2017
Article no.: PC-12310217

Chain Tensioners / Axle Blocks Pro Circuit red CRF 2009-2017

77,00 €
Ready for dispatch shortly
Prox
Front Sprocket Prox 14 teeth CRF 250 after 2018
Article no.: PROX-12102214

Front Sprocket Prox 14 teeth CRF 250 after 2018

16,00 €
Ready for dispatch shortly
Prox
Front Sprocket Prox 13 teeth CRF 250 after 2018
Article no.: PROX-12102213

Front Sprocket Prox 13 teeth CRF 250 after 2018

16,00 €
Ready for dispatch shortly
Prox
Front Sprocket Prox 12 teeth CRF 250 after 2018
Article no.: PROX-12102212

Front Sprocket Prox 12 teeth CRF 250 after 2018

16,00 €
Ready for dispatch shortly
Doppler
Rear Sprocket 68 teeth Doppler aluminium CNC black MBK 51 / Peugeot 103
Article no.: CGN513527

Rear Sprocket 68 teeth Doppler aluminium CNC black MBK 51 / Peugeot 103

52,00 €
Ready for dispatch shortly
Doppler
Carrier Plate f. rear sprocket Doppler aluminium CNC black MBK 51
Article no.: CGN512882

Carrier Plate f. rear sprocket Doppler aluminium CNC black MBK 51

58,50 €
Ready for dispatch shortly
Standard Parts
Chain Kit Afam 12x58 - 420 Fantic Caballero 2006 - 2017
Article no.: CGN509298

Chain Kit Afam 12x58 - 420 Fantic Caballero 2006 - 2017

66,00 €
Ready for dispatch shortly
Moto Master
Front Sprocket Moto Master 428 13 teeth TC / SX 85 after 2018
Article no.: MMAST-12121569

Front Sprocket Moto Master 428 13 teeth TC / SX 85 after 2018

16,00 €
Ready for dispatch shortly
Moto Master
Front Sprocket Moto Master 420 15 teeth YZ 65
Article no.: MMAST-12121568

Front Sprocket Moto Master 420 15 teeth YZ 65

16,00 €
Ready for dispatch shortly
Moto Master
Front Sprocket Moto Master 420 13 teeth YZ 65
Article no.: MMAST-12121566

Front Sprocket Moto Master 420 13 teeth YZ 65

16,00 €
Ready for dispatch shortly
Moto Master
Front Sprocket Moto Master 520 12 teeth GasGas / Rieju
Article no.: MMAST-12121537

Front Sprocket Moto Master 520 12 teeth GasGas / Rieju

16,00 €
Ready for dispatch shortly
Moto Master
Front Sprocket Moto Master 520 14 teeth TM Racing 250 / 300
Article no.: MMAST-12121536

Front Sprocket Moto Master 520 14 teeth TM Racing 250 / 300

16,00 €
Ready for dispatch shortly
Moto Master
Front Sprocket Moto Master 520 13 teeth TM Racing 250 / 300
Article no.: MMAST-12121535

Front Sprocket Moto Master 520 13 teeth TM Racing 250 / 300

16,00 €
Ready for dispatch shortly
Moto Master
Front Sprocket Moto Master 520 13 teeth TM Racing 125 / 144
Article no.: MMAST-12121532

Front Sprocket Moto Master 520 13 teeth TM Racing 125 / 144

16,00 €
Ready for dispatch shortly
Moto Master
Front Sprocket Moto Master 520 12 teeth TM Racing 125 / 144
Article no.: MMAST-12121531

Front Sprocket Moto Master 520 12 teeth TM Racing 125 / 144

16,00 €
Ready for dispatch shortly
Moto Master
Front Sprocket Moto Master 520 14 teeth RM-Z 450 after 2013
Article no.: MMAST-12121530

Front Sprocket Moto Master 520 14 teeth RM-Z 450 after 2013

16,00 €
Ready for dispatch shortly
Moto Master
Front Sprocket Moto Master 520 13 teeth RM-Z 450 after 2013
Article no.: MMAST-12121529

Front Sprocket Moto Master 520 13 teeth RM-Z 450 after 2013

16,00 €
Ready for dispatch shortly
Moto Master
Front Sprocket Moto Master 520 12 teeth RM-Z 250 after 2013
Article no.: MMAST-12121526

Front Sprocket Moto Master 520 12 teeth RM-Z 250 after 2013

16,00 €
Ready for dispatch shortly
Moto Master
Front Sprocket Moto Master 520 14 teeth TC / TE 449
Article no.: MMAST-12121525

Front Sprocket Moto Master 520 14 teeth TC / TE 449

16,00 €
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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