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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 Kit Afam 428 MX 85 KX 13/54 ultra-light rear sprocket
Article no.: 48011187

Chain Kit Afam 428 MX 85 KX 13/54 ultra-light rear sprocket

119,00 €
Currently not in stock
AFAM
Chain Kit Afam 520 MR2 Husqvarna CR 125 12/50 ultra-light rear sprocket
Article no.: 48011049

Chain Kit Afam 520 MR2 Husqvarna CR 125 12/50 ultra-light rear sprocket

106,00 €
Currently not in stock
AFAM
Chain Kit Afam 420 MX CR 85 15/56
Article no.: 48010406

Chain Kit Afam 420 MX CR 85 15/56

90,00 €
Currently not in stock
AFAM
Rear Sprocket Afam steel self-cleaning 50 teeth Beta RR
Article no.: 1074641003

Rear Sprocket Afam steel self-cleaning 50 teeth Beta RR

48,50 €
Currently not in stock
AFAM
Rear Sprocket Afam steel self-cleaning 49 teeth Beta RR
Article no.: 1074641002

Rear Sprocket Afam steel self-cleaning 49 teeth Beta RR

48,50 €
Currently not in stock
AFAM
Rear Sprocket Afam steel self-cleaning 48 teeth Beta RR
Article no.: 1074641001

Rear Sprocket Afam steel self-cleaning 48 teeth Beta RR

48,00 €
Currently not in stock
AFAM
Front Sprocket Afam steel 13 teeth CRF 250
Article no.: 1074817001

Front Sprocket Afam steel 13 teeth CRF 250

18,00 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium 428 / 50 teeth CR 80 / 85
Article no.: 1074386002

Rear Sprocket Afam aluminium 428 / 50 teeth CR 80 / 85

41,00 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium 428 / 53 teeth RM / YZ 85
Article no.: 1074533008

Rear Sprocket Afam aluminium 428 / 53 teeth RM / YZ 85

46,50 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium 42 teeth KTM / Husqvarna
Article no.: 1074736009

Rear Sprocket Afam aluminium 42 teeth KTM / Husqvarna

43,00 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium 420 / 52 teeth CR 80 / 85
Article no.: 1074384004

Rear Sprocket Afam aluminium 420 / 52 teeth CR 80 / 85

41,00 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium self-cleaning 428 / 53 teeth RM / YZ 85
Article no.: 1074532007

Rear Sprocket Afam aluminium self-cleaning 428 / 53 teeth RM / YZ 85

54,50 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium 420 / 56 teeth CR 80 / 85
Article no.: 1074384007

Rear Sprocket Afam aluminium 420 / 56 teeth CR 80 / 85

44,50 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium 428 / 49 teeth CR 80 / 85
Article no.: 1074386001

Rear Sprocket Afam aluminium 428 / 49 teeth CR 80 / 85

41,00 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium 46 teeth Kawasaki KX / KXF
Article no.: 1074600001

Rear Sprocket Afam aluminium 46 teeth Kawasaki KX / KXF

50,50 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium self-cleaning 54 teeth Yamaha YZ / YZF
Article no.: 1074470008

Rear Sprocket Afam aluminium self-cleaning 54 teeth Yamaha YZ / YZF

60,50 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium 420 / 55 teeth KX 80 / 85
Article no.: 1074595006

Rear Sprocket Afam aluminium 420 / 55 teeth KX 80 / 85

47,00 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium 428 / 55 teeth KX 80 / 85
Article no.: 1074597004

Rear Sprocket Afam aluminium 428 / 55 teeth KX 80 / 85

48,50 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium self-cleaning 53 teeth Suzuki RM-Z 250 / 450
Article no.: 1074536007

Rear Sprocket Afam aluminium self-cleaning 53 teeth Suzuki RM-Z 250 / 450

59,50 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium self-cleaning 47 teeth Suzuki RM-Z 250 / 450
Article no.: 1074536001

Rear Sprocket Afam aluminium self-cleaning 47 teeth Suzuki RM-Z 250 / 450

49,50 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium 53T self-cleaning 420 / CR 80 / 85
Article no.: 1074384005

Rear Sprocket Afam aluminium 53T self-cleaning 420 / CR 80 / 85

41,00 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium self-cleaning 46 teeth KX 65
Article no.: 1074598001

Rear Sprocket Afam aluminium self-cleaning 46 teeth KX 65

40,00 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium self-cleaning 420 / 53 teeth KX 80 / 85
Article no.: 1074595004

Rear Sprocket Afam aluminium self-cleaning 420 / 53 teeth KX 80 / 85

48,50 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium self-cleaning 428 / 46 teeth RM / YZ 85
Article no.: 1074533001

Rear Sprocket Afam aluminium self-cleaning 428 / 46 teeth RM / YZ 85

40,00 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium self-cleaning 428 / 54 teeth KX 80 / 85
Article no.: 1074597003

Rear Sprocket Afam aluminium self-cleaning 428 / 54 teeth KX 80 / 85

48,00 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium self-cleaning 420 / 52 teeth KX 80 / 85
Article no.: 1074596004

Rear Sprocket Afam aluminium self-cleaning 420 / 52 teeth KX 80 / 85

41,00 €
Currently not in stock
AFAM
Rear Sprocket Afam aluminium self-cleaning 53 teeth Kawasaki KX / KXF
Article no.: 1074602004

Rear Sprocket Afam aluminium self-cleaning 53 teeth Kawasaki KX / KXF

51,50 €
Currently not in stock
AFAM
Front Sprocket Afam self-cleaning 420 / 12 teeth SX / TC 65
Article no.: 1077161001

Front Sprocket Afam self-cleaning 420 / 12 teeth SX / TC 65

12,50 €
Currently not in stock
AFAM
Front Sprocket Afam self-cleaning 428 / 12 teeth TC / SX 85
Article no.: 1077168002

Front Sprocket Afam self-cleaning 428 / 12 teeth TC / SX 85

12,50 €
Currently not in stock
AFAM
Front Sprocket Afam 12 teeth Husqvarna CR / WR 125 1991-1994
Article no.: 1076875001

Front Sprocket Afam 12 teeth Husqvarna CR / WR 125 1991-1994

18,00 €
Currently not in stock
AFAM
Front Sprocket Afam 10 teeth Kawasaki / Yamaha
Article no.: 1076710001

Front Sprocket Afam 10 teeth Kawasaki / Yamaha

14,50 €
Currently not in stock
AFAM
Front Sprocket Afam 14 teeth KX 125
Article no.: 1076688004

Front Sprocket Afam 14 teeth KX 125

15,50 €
Currently not in stock
AFAM
Front Sprocket Afam 16 teeth CR 80 / 85
Article no.: 1074512003

Front Sprocket Afam 16 teeth CR 80 / 85

9,60 €
Currently not in stock
AFAM
Chain Master Link (rivet) Afam A415GPR-G gold
Article no.: 1047744

Chain Master Link (rivet) Afam A415GPR-G gold

3,20 €
Currently not in stock
AFAM
Chain Afam A415GPR-G 126 links
Article no.: 1077250002

Chain Afam A415GPR-G 126 links

90,00 €
Currently not in stock
AFAM
Chain Kit AFAM XS-Ring extra reinforced 15x49 Aprilia RX125 2008 - 2010
Article no.: AFAMKS-A-186

Chain Kit AFAM XS-Ring extra reinforced 15x49 Aprilia RX125 2008 - 2010

116,00 €
Currently not in stock
AFAM
Chain Kit AFAM XS-Ring extra reinforced 15x45 Aprilia SX125 2008 - 2010
Article no.: AFAMKS-A-187

Chain Kit AFAM XS-Ring extra reinforced 15x45 Aprilia SX125 2008 - 2010

112,00 €
Currently not in stock
AFAM
Chain Kit AFAM XS-Ring 15x49 Aprilia RX125 2008 - 2010
Article no.: AFAMKS-A-185

Chain Kit AFAM XS-Ring 15x49 Aprilia RX125 2008 - 2010

103,00 €
Currently not in stock
AFAM
Chain Kit AFAM XS-Ring 15x45 Aprilia SX125 2008 - 2010
Article no.: AFAMKS-A-188

Chain Kit AFAM XS-Ring 15x45 Aprilia SX125 2008 - 2010

98,00 €
Currently not in stock
AFAM
Chain Kit AFAM 16x53 Yamaha TDR 125 1997 - 2002
Article no.: AFAMKS-A-25

Chain Kit AFAM 16x53 Yamaha TDR 125 1997 - 2002

90,00 €
Currently not in stock
AFAM
Chain Kit AFAM 16x39 Kymco Hipster 125 4V / Zing II
Article no.: AFAMKS-A-59

Chain Kit AFAM 16x39 Kymco Hipster 125 4V / Zing II

81,00 €
Currently not in stock
AFAM
Chain Kit AFAM 16x39 Kymco CK 125
Article no.: AFAMKS-A-8

Chain Kit AFAM 16x39 Kymco CK 125

38,50 €
Currently not in stock
AFAM
Chain Kit AFAM 16x28 Kymco KXR 50 / Maxxer 50
Article no.: AFAMKS-A-10

Chain Kit AFAM 16x28 Kymco KXR 50 / Maxxer 50

28,00 €
Currently not in stock
AFAM
Chain Kit AFAM 15x44 Hyosung GT 650 / Comet / Naked
Article no.: AFAMKS-A-63

Chain Kit AFAM 15x44 Hyosung GT 650 / Comet / Naked

108,00 €
Currently not in stock
AFAM
Chain Kit AFAM 15x39 Kymco Pulsar 125
Article no.: AFAMKS-A-6

Chain Kit AFAM 15x39 Kymco Pulsar 125

38,50 €
Currently not in stock
AFAM
Chain Kit AFAM 14x52 Hyosung GT 125 / Naked
Article no.: AFAMKS-A-57

Chain Kit AFAM 14x52 Hyosung GT 125 / Naked

93,00 €
Currently not in stock
AFAM
Chain Kit AFAM 14x48 Yamaha YZF-R 125 / MT 125
Article no.: AFAMKS-A-36

Chain Kit AFAM 14x48 Yamaha YZF-R 125 / MT 125

86,00 €
Currently not in stock
AFAM
Chain Kit AFAM 13x39 Honda TRX 250 R
Article no.: AFAMKS-A-12

Chain Kit AFAM 13x39 Honda TRX 250 R

81,50 €
Currently not in stock
AFAM
Chain Kit AFAM 13x38 Honda TRX 450 R before 2015
Article no.: AFAMKS-A-13

Chain Kit AFAM 13x38 Honda TRX 450 R before 2015

84,00 €
Currently not in stock
AFAM
Chain Kit AFAM 12x56 Beta RR 1999 - 2001
Article no.: AFAMKS-A-149

Chain Kit AFAM 12x56 Beta RR 1999 - 2001

73,00 €
Currently not in stock
AFAM
Chain Kit AFAM 12x45 Aprilia Pegaso / RX3
Article no.: AFAMKS-A-168

Chain Kit AFAM 12x45 Aprilia Pegaso / RX3

47,00 €
Currently not in stock
AFAM
Chain Kit AFAM 11x48 Yamaha DT 2003 - 2006
Article no.: AFAMKS-A-118

Chain Kit AFAM 11x48 Yamaha DT 2003 - 2006

39,50 €
Currently not in stock
AFAM
Chain Kit AFAM 11x47 Rieju RS2
Article no.: AFAMKS-A-127

Chain Kit AFAM 11x47 Rieju RS2

42,50 €
Currently not in stock
AFAM
Chain Kit AFAM 11x43 Aprilia AF1
Article no.: AFAMKS-A-92

Chain Kit AFAM 11x43 Aprilia AF1

62,50 €
Currently not in stock
AFAM
Chain AFAM XS-Ring reinforced black 520 XMR2 96 links
Article no.: AFAM520XMR2-96

Chain AFAM XS-Ring reinforced black 520 XMR2 96 links

56,00 €
Currently not in stock
AFAM
Chain Rivet Master Link AFAM reinforced gold A520 MR1-G
Article no.: AFAM520MR1-G

Chain Rivet Master Link AFAM reinforced gold A520 MR1-G

2,80 €
Currently not in stock
Piaggio
Countershaft Piaggio Zip2 after `06
Article no.: OE-PIA877450

Countershaft Piaggio Zip2 after `06

122,00 €
Currently not in stock
Piaggio
Wheel Axle Piaggio Zip2 after `06
Article no.: OE-PIA877449

Wheel Axle Piaggio Zip2 after `06

119,00 €
Currently not in stock
Piaggio
Wheel Axle Piaggio TPH Euro4
Article no.: OE-PIA8337855

Wheel Axle Piaggio TPH Euro4

286,00 €
Currently not in stock
Piaggio
Countershaft Piaggio Zip2 SP
Article no.: OE-PIA8257895

Countershaft Piaggio Zip2 SP

292,00 €
Currently not in stock
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45464748495051

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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