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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 Fairing 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 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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UFO
Chain Roller CRF 250 / 450 after 2021 UFO black
Article no.: UF-HO05612#001

Chain Roller CRF 250 / 450 after 2021 UFO black

13,00 €
Currently not in stock
UFO
Swingarm Slider CRF 250 / 450 after 2007 UFO red
Article no.: UF-HO05611@070

Swingarm Slider CRF 250 / 450 after 2007 UFO red

25,50 €
Currently not in stock
UFO
Swingarm Slider CRF 250 / 450 after 2007 UFO black
Article no.: UF-HO05611@001

Swingarm Slider CRF 250 / 450 after 2007 UFO black

25,50 €
Currently not in stock
UFO
Chain Roller YZ / YZF after 2010 UFO blue
Article no.: UF-YA04815@089

Chain Roller YZ / YZF after 2010 UFO blue

12,00 €
Currently not in stock
UFO
Chain Roller YZ / YZF after 2010 UFO black
Article no.: UF-YA04815@001

Chain Roller YZ / YZF after 2010 UFO black

12,00 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set YZF after 2023 blue UFO
Article no.: UF-YA05800@089

Chain Slider / Swingarm Slider Set YZF after 2023 blue UFO

25,50 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set YZF after 2023 black UFO
Article no.: UF-YA05800@001

Chain Slider / Swingarm Slider Set YZF after 2023 black UFO

25,50 €
Currently not in stock
UFO
Swingarm Slider YZF after 2023 blue UFO
Article no.: UF-YA04899#089

Swingarm Slider YZF after 2023 blue UFO

17,50 €
Currently not in stock
UFO
Swingarm Slider YZF after 2023 black UFO
Article no.: UF-YA04899#001

Swingarm Slider YZF after 2023 black UFO

17,50 €
Currently not in stock
UFO
Swingarm Slider YZF after 2023 blue UFO
Article no.: UF-YA04898#089

Swingarm Slider YZF after 2023 blue UFO

16,50 €
Currently not in stock
UFO
Swingarm Slider YZF after 2023 black UFO
Article no.: UF-YA04898#001

Swingarm Slider YZF after 2023 black UFO

16,50 €
Currently not in stock
Polini
Secondary Gears Polini 18/24 Suzuki CP 50
Article no.: P202.1319

Secondary Gears Polini 18/24 Suzuki CP 50

61,00 €
Currently not in stock
UFO
Swingarm Slider UFO CRF 250 2022 red
Article no.: UF-HO05610#070

Swingarm Slider UFO CRF 250 2022 red

21,00 €
Currently not in stock
RRP
21,42 €
-2% Discount
UFO
Swingarm Slider UFO CRF 250 2022 black
Article no.: UF-HO05610#001

Swingarm Slider UFO CRF 250 2022 black

21,00 €
Currently not in stock
RRP
21,42 €
-2% Discount
Standard Parts
Transmission Gear Set Morini AC 2002
Article no.: SP-10100101

Transmission Gear Set Morini AC 2002

60,00 €
Currently not in stock
Rieju
Rear Sprocket Rieju 60 Z SMX / RRX / Spike-X Power Up
Article no.: OE-RIE0/000.500.5030

Rear Sprocket Rieju 60 Z SMX / RRX / Spike-X Power Up

45,00 €
Currently not in stock
Standard Parts
Rear Sprocket IGM Rieju SMX "06 62mm 5 hole 60Z Power Up
Article no.: SP-1375-8310

Rear Sprocket IGM Rieju SMX "06 62mm 5 hole 60Z Power Up

13,50 €
Currently not in stock
Standard Parts
Rear Sprocket IGM Rieju RS2 Matrix 55mm 3 hole 46 teeth
Article no.: SP-85842

Rear Sprocket IGM Rieju RS2 Matrix 55mm 3 hole 46 teeth

12,00 €
Currently not in stock
Yamaha
Gear Shaft Yamaha Neos / MBK Ovetto 4T
Article no.: OE-YAM5C3E74100000

Gear Shaft Yamaha Neos / MBK Ovetto 4T

195,00 €
Currently not in stock
AFAM
Chain Master Link rivet for motocross chain AFAM A420MX2G
Article no.: AFAMMRA420MX2-G

Chain Master Link rivet for motocross chain AFAM A420MX2G

3,80 €
Currently not in stock
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 €
Currently not in stock
AFAM
Chain motocross AFAM A428MXG - clip
Article no.: AFAMA428MX-G

Chain motocross AFAM A428MXG - clip

from 56,00 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
RRP
35,71 €
-2% Discount
UFO
Chain Slider / Swingarm Slider Set UFO KTM SX / SX-F 2023 black
Article no.: UF-KT05019001

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

35,00 €
Currently not in stock
RRP
35,71 €
-2% Discount
UFO
Swingarm Slider UFO orange KTM SX/SX-F 2024
Article no.: UF-KT05017127

Swingarm Slider UFO orange KTM SX/SX-F 2024

23,00 €
Currently not in stock
RRP
23,16 €
-1% Discount
UFO
Swingarm Slider UFO KTM SX/SX-F 2023
Article no.: UF-KT05017001

Swingarm Slider UFO KTM SX/SX-F 2023

23,00 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
RFX
Chain Tensioners / Axle Blocks RFX Pro blue YZ 125 / 250 after 2009
Article no.: R-FXAB4020099BU

Chain Tensioners / Axle Blocks RFX Pro blue YZ 125 / 250 after 2009

31,50 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
RFX
Chain Roller RFX Race red 34mm
Article no.: R-FXCR1010055RD

Chain Roller RFX Race red 34mm

9,70 €
Currently not in stock
RFX
Chain Roller RFX Race black 34mm
Article no.: R-FXCR1010055BK

Chain Roller RFX Race black 34mm

9,70 €
Currently not in stock
RFX
Chain Roller RFX Race red 38mm universal
Article no.: R-FXCR1003855RD

Chain Roller RFX Race red 38mm universal

12,00 €
Currently not in stock
RFX
Chain Roller RFX Race blue 38mm universal
Article no.: R-FXCR1003855BU

Chain Roller RFX Race blue 38mm universal

12,00 €
Currently not in stock
RFX
Chain Tensioners / Axle Blocks RFX Pro blue
Article no.: R-FXAB7030099BU

Chain Tensioners / Axle Blocks RFX Pro blue

33,00 €
Currently not in stock
RFX
Chain Roller RFX Race red 32mm universal
Article no.: R-FXCR1003255RD

Chain Roller RFX Race red 32mm universal

9,70 €
Currently not in stock
RFX
Chain Roller RFX Race blue 32mm universal
Article no.: R-FXCR1003255BU

Chain Roller RFX Race blue 32mm universal

9,70 €
Currently not in stock
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 €
Currently not in stock
RFX
Chain Tensioners / Axle Blocks RFX Pro orange KTM 65
Article no.: R-FXAB5010099OR

Chain Tensioners / Axle Blocks RFX Pro orange KTM 65

31,50 €
Currently not in stock
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 €
Currently not in stock
Standard Parts
Rear Sprocket / Driver 51 teeth Simson
Article no.: MOF-42933

Rear Sprocket / Driver 51 teeth Simson

240,00 €
Currently not in stock
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 €
Currently not in stock
Standard Parts
Front Sprocket old version 11 teeth Simson
Article no.: MOF-41738

Front Sprocket old version 11 teeth Simson

9,70 €
Currently not in stock
Standard Parts
Gear Wheel 38 teeth Simson
Article no.: MOF-41610

Gear Wheel 38 teeth Simson

44,00 €
Currently not in stock
Standard Parts
Chain Drive 14 parts Simson
Article no.: MOF-44479

Chain Drive 14 parts Simson

92,00 €
Currently not in stock
Standard Parts
Chain Drive 14 parts Simson
Article no.: MOF-43937

Chain Drive 14 parts Simson

98,50 €
Currently not in stock
Standard Parts
Chain Drive 14 parts Simson
Article no.: MOF-43938

Chain Drive 14 parts Simson

82,00 €
Currently not in stock
Standard Parts
Driver Set elastic Puch ZA50 gearbox
Article no.: MOF-43795

Driver Set elastic Puch ZA50 gearbox

35,00 €
Currently not in stock
Standard Parts
Driver Set elastic reinforced Puch ZA50 gearbox
Article no.: MOF-43794

Driver Set elastic reinforced Puch ZA50 gearbox

37,50 €
Currently not 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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