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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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AFAM Algi Aprilia Avoc Beta Bidalot Buzzetti Conti CPI 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 Rollers Honda CRF 250 2012-2021 black
Article no.: UF-HO04653@001

Chain Rollers Honda CRF 250 2012-2021 black

21,50 €
Currently not in stock
UFO
Chain Roller Honda CRF 250 2004 red
Article no.: UF-HO03699#070

Chain Roller Honda CRF 250 2004 red

13,00 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set Honda CRF 250 / 450 2017-2021 red
Article no.: UF-HO04690@070

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

25,50 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set Honda CRF 250 / 450 2013-2017 red
Article no.: UF-HO04665@070

Chain Slider / Swingarm Slider Set Honda CRF 250 / 450 2013-2017 red

25,50 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set Honda CRF 250 / 450 2013-2017 black
Article no.: UF-HO04665@001

Chain Slider / Swingarm Slider Set Honda CRF 250 / 450 2013-2017 black

25,50 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set Honda CRF 250 / 450 2009-2013 red
Article no.: UF-HO04645@070

Chain Slider / Swingarm Slider Set Honda CRF 250 / 450 2009-2013 red

25,50 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set Honda CRF 250 / 450 2009-2013 black
Article no.: UF-HO04645@001

Chain Slider / Swingarm Slider Set Honda CRF 250 / 450 2009-2013 black

25,50 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set Honda CR 125 / 250 2007 red
Article no.: UF-HO04633@070

Chain Slider / Swingarm Slider Set Honda CR 125 / 250 2007 red

25,50 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set Honda CR 125 / 250 2007 black
Article no.: UF-HO04633@001

Chain Slider / Swingarm Slider Set Honda CR 125 / 250 2007 black

25,50 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set Honda CR 125 / 250 2005-2006 red
Article no.: UF-HO04632@070

Chain Slider / Swingarm Slider Set Honda CR 125 / 250 2005-2006 red

25,50 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set Honda CR 125 / 250 2005-2006 black
Article no.: UF-HO04632@001

Chain Slider / Swingarm Slider Set Honda CR 125 / 250 2005-2006 black

25,50 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set Honda CR 125 / 250 2000-2004 red
Article no.: UF-HO04631@070

Chain Slider / Swingarm Slider Set Honda CR 125 / 250 2000-2004 red

25,50 €
Currently not in stock
UFO
Chain Slider / Swingarm Slider Set Honda CR 125 / 250 2000-2004 black
Article no.: UF-HO04631@001

Chain Slider / Swingarm Slider Set Honda CR 125 / 250 2000-2004 black

25,50 €
Currently not in stock
UFO
Swingarm Slider GasGas MC / EC 2021-2023 UFO black
Article no.: UF-GG07134@001

Swingarm Slider GasGas MC / EC 2021-2023 UFO black

17,00 €
Currently not in stock
UFO
Swingarm Slider GasGas MC / EC 2021-2023 UFO black
Article no.: UF-GG07133@001

Swingarm Slider GasGas MC / EC 2021-2023 UFO black

16,50 €
Currently not in stock
UFO
Swingarm Slider GasGas MC 85 UFO black
Article no.: UF-GG07121@001

Swingarm Slider GasGas MC 85 UFO black

16,50 €
Currently not in stock
UFO
Chain Roller CRF 250 / 450 after 2021 UFO red
Article no.: UF-HO05612#070

Chain Roller CRF 250 / 450 after 2021 UFO red

13,00 €
Currently not in stock
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
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
Polini
Secondary Transmission Polini 18/24 Suzuki CP 50
Article no.: P202.1319

Secondary Transmission Polini 18/24 Suzuki CP 50

61,00 €
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
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
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
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 orange KTM 65
Article no.: R-FXAB5010099OR

Chain Tensioners / Axle Blocks RFX Pro orange KTM 65

31,50 €
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
Standard Parts
Gearbox 5-speed Sport complete 24/32 / 1st gear long ratio Simson
Article no.: MOF-43540

Gearbox 5-speed Sport complete 24/32 / 1st gear long ratio Simson

359,00 €
Currently not in stock
Standard Parts
Gearbox 5-speed Sport complete 23/32 Simson
Article no.: MOF-43539

Gearbox 5-speed Sport complete 23/32 Simson

249,00 €
Currently not in stock
Polini
Secondary Transmission Polini 16/42 Vespa GTS / Primavera / Sprint 125 / 150 Euro 4/5
Article no.: P202.1416

Secondary Transmission Polini 16/42 Vespa GTS / Primavera / Sprint 125 / 150 Euro 4/5

105,00 €
Currently not in stock
Polini
Secondary Transmission Polini 16/42 Vespa GTS / Primavera / Sprint 125 / 150 Euro 3
Article no.: P202.1415

Secondary Transmission Polini 16/42 Vespa GTS / Primavera / Sprint 125 / 150 Euro 3

93,00 €
Currently not in stock
Polini
Secondary Transmission Polini 14/48 with wheel shaft with buffers Piaggio after 1998
Article no.: P202.1409

Secondary Transmission Polini 14/48 with wheel shaft with buffers Piaggio after 1998

376,00 €
Currently not in stock
Polini
Secondary Transmission Polini PGO Big Max / T-Rex 50
Article no.: P202.1421

Secondary Transmission Polini PGO Big Max / T-Rex 50

79,50 €
Currently not in stock
Polini
Primary Transmission Polini 17/41 Cagiva City
Article no.: P202.1334

Primary Transmission Polini 17/41 Cagiva City

57,50 €
Currently not in stock
Polini
Primary Transmission Polini 14/43 Italjet Pista
Article no.: P202.1318

Primary Transmission Polini 14/43 Italjet Pista

59,00 €
Currently not in stock
Pro Circuit
Chain Tensioners / Axle Blocks Pro Circuit bronze KXF / RM-Z
Article no.: PC-12310268

Chain Tensioners / Axle Blocks Pro Circuit bronze KXF / RM-Z

77,00 €
Currently not in stock
Pro Circuit
Chain Tensioners / Axle Blocks Pro Circuit red CRF 150
Article no.: PC-12310106

Chain Tensioners / Axle Blocks Pro Circuit red CRF 150

77,00 €
Currently not in stock
Moto Master
Front Sprocket Moto Master 520 13 teeth Sherco SE-R 250 / 300
Article no.: MMAST-12121542

Front Sprocket Moto Master 520 13 teeth Sherco SE-R 250 / 300

16,00 €
Currently not in stock
Moto Master
Front Sprocket Moto Master 520 15 teeth CR / WR 250
Article no.: MMAST-12121520

Front Sprocket Moto Master 520 15 teeth CR / WR 250

16,00 €
Currently not in stock
Moto Master
Front Sprocket Moto Master 420 13 teeth KX 85
Article no.: MMAST-12121513

Front Sprocket Moto Master 420 13 teeth KX 85

16,00 €
Currently not in stock
Moto Master
Front Sprocket Moto Master 520 14 teeth RM-Z 450 2005 - 2012
Article no.: MMAST-12121512

Front Sprocket Moto Master 520 14 teeth RM-Z 450 2005 - 2012

16,00 €
Currently not in stock
Moto Master
Front Sprocket Moto Master 520 12 teeth YZ 125 1987 - 2004
Article no.: MMAST-12121502

Front Sprocket Moto Master 520 12 teeth YZ 125 1987 - 2004

16,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 420 aluminium 48 teeth black YZ 65
Article no.: MMAST-12112500

Rear Sprocket Moto Master 420 aluminium 48 teeth black YZ 65

48,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 52 teeth blue TM Racing MX / EN
Article no.: MMAST-12112459

Rear Sprocket Moto Master 520 aluminium 52 teeth blue TM Racing MX / EN

48,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 420 Fusion 47 teeth orange TC / SX 65
Article no.: MMAST-12112394

Rear Sprocket Moto Master 420 Fusion 47 teeth orange TC / SX 65

65,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 420 Fusion 49 teeth black TC / SX 65
Article no.: MMAST-12112391

Rear Sprocket Moto Master 420 Fusion 49 teeth black TC / SX 65

65,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 420 aluminium 52 teeth black TC / SX 65
Article no.: MMAST-12112378

Rear Sprocket Moto Master 420 aluminium 52 teeth black TC / SX 65

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 50 teeth blue YZ / YZF
Article no.: MMAST-12112311

Rear Sprocket Moto Master 520 aluminium 50 teeth blue YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 49 teeth blue YZ / YZF
Article no.: MMAST-12112310

Rear Sprocket Moto Master 520 aluminium 49 teeth blue YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 47 teeth blue YZ / YZF
Article no.: MMAST-12112308

Rear Sprocket Moto Master 520 aluminium 47 teeth blue YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 428 Fusion 46 teeth orange TC / SX 85
Article no.: MMAST-12112284

Rear Sprocket Moto Master 428 Fusion 46 teeth orange TC / SX 85

65,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 52 teeth blue KTM / Husqvarna
Article no.: MMAST-12112247

Rear Sprocket Moto Master 520 Fusion 52 teeth blue KTM / Husqvarna

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 50 teeth blue KTM / Husqvarna
Article no.: MMAST-12112245

Rear Sprocket Moto Master 520 Fusion 50 teeth blue KTM / Husqvarna

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 49 teeth orange KTM / Husqvarna
Article no.: MMAST-12112232

Rear Sprocket Moto Master 520 aluminium 49 teeth orange KTM / Husqvarna

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 420 aluminium 50 teeth black KX 85
Article no.: MMAST-12112187

Rear Sprocket Moto Master 420 aluminium 50 teeth black KX 85

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 50 teeth black KXF 250 / 450
Article no.: MMAST-12112182

Rear Sprocket Moto Master 520 Fusion 50 teeth black KXF 250 / 450

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 428 Fusion 50 teeth blue RM 85 / YZ 85
Article no.: MMAST-12112170

Rear Sprocket Moto Master 428 Fusion 50 teeth blue RM 85 / YZ 85

65,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 49 teeth red CR / CRF
Article no.: MMAST-12112109

Rear Sprocket Moto Master 520 Fusion 49 teeth red CR / CRF

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 48 teeth red CR / CRF
Article no.: MMAST-12112108

Rear Sprocket Moto Master 520 Fusion 48 teeth red CR / CRF

73,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 Fusion 49 teeth black CR / CRF
Article no.: MMAST-12112104

Rear Sprocket Moto Master 520 Fusion 49 teeth black CR / CRF

73,50 €
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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