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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
Front Sprocket AFAM 17 teeth 520 Honda NC750
Article no.: AFAM20617-17

Front Sprocket AFAM 17 teeth 520 Honda NC750

18,00 €
Ready for dispatch shortly
AFAM
Front Sprocket AFAM 16 teeth 428 Kymco Hipster / Meteorit / Stryker / Quannon
Article no.: AFAM26200-16

Front Sprocket AFAM 16 teeth 428 Kymco Hipster / Meteorit / Stryker / Quannon

7,20 €
Ready for dispatch shortly
AFAM
Front Sprocket AFAM 14 teeth 520 Honda TRX 400 EX
Article no.: AFAM20510-14

Front Sprocket AFAM 14 teeth 520 Honda TRX 400 EX

10,50 €
Ready for dispatch shortly
AFAM
Front Sprocket AFAM 15 teeth 428 Kymco Hipster / Meteorit / Stryker / Quannon
Article no.: AFAM26200-15

Front Sprocket AFAM 15 teeth 428 Kymco Hipster / Meteorit / Stryker / Quannon

6,90 €
Ready for dispatch shortly
AFAM
Front Sprocket AFAM 14 teeth 520 Aprilia AF1 / Pegaso
Article no.: AFAM61201-14

Front Sprocket AFAM 14 teeth 520 Aprilia AF1 / Pegaso

10,00 €
Ready for dispatch shortly
AFAM
Front Sprocket AFAM 14 teeth 428 Yamaha TW 125 / 200
Article no.: AFAM21305-14

Front Sprocket AFAM 14 teeth 428 Yamaha TW 125 / 200

5,70 €
Ready for dispatch shortly
AFAM
Front Sprocket AFAM 14 teeth 428 Kymco K-Pipe 125 / 150 / Honda CRF 100
Article no.: AFAM20107-14

Front Sprocket AFAM 14 teeth 428 Kymco K-Pipe 125 / 150 / Honda CRF 100

4,60 €
Ready for dispatch shortly
AFAM
Front Sprocket AFAM 13 teeth 520 Honda TRX 250 X / R
Article no.: AFAM20308-13

Front Sprocket AFAM 13 teeth 520 Honda TRX 250 X / R

12,00 €
Ready for dispatch shortly
AFAM
Front Sprocket AFAM 13 teeth 520 Aprilia AF1 / Pegaso
Article no.: AFAM61201-13

Front Sprocket AFAM 13 teeth 520 Aprilia AF1 / Pegaso

10,00 €
Ready for dispatch shortly
AFAM
Front Sprocket AFAM 13 teeth 420 Morini
Article no.: AFAM58102-13

Front Sprocket AFAM 13 teeth 420 Morini

7,70 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM extra reinforced 17x43 Honda NC750 S / SA ABS / X / XA ABS
Article no.: AFAMKS-A-21

Chain Kit AFAM extra reinforced 17x43 Honda NC750 S / SA ABS / X / XA ABS

118,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM extra reinforced 16x43 Honda NC 700 S / SA ABS / X / XA ABS
Article no.: AFAMKS-A-19

Chain Kit AFAM extra reinforced 16x43 Honda NC 700 S / SA ABS / X / XA ABS

117,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM extra reinforced 16x41 KTM Duke 790
Article no.: AFAMKS-A-161

Chain Kit AFAM extra reinforced 16x41 KTM Duke 790

108,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM extra reinforced 14x45 KTM RC 125 after 2014
Article no.: AFAMKS-A-160

Chain Kit AFAM extra reinforced 14x45 KTM RC 125 after 2014

115,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM extra reinforced 14x45 KTM Duke 125 before 2013
Article no.: AFAMKS-A-153

Chain Kit AFAM extra reinforced 14x45 KTM Duke 125 before 2013

108,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM extra reinforced 14x45 KTM Duke 125 after 2014
Article no.: AFAMKS-A-154

Chain Kit AFAM extra reinforced 14x45 KTM Duke 125 after 2014

114,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM extra reinforced 14x42 KTM Duke 200 before 2013
Article no.: AFAMKS-A-163

Chain Kit AFAM extra reinforced 14x42 KTM Duke 200 before 2013

106,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM extra reinforced 14x42 KTM Duke 200 / RC 200 after 2014
Article no.: AFAMKS-A-165

Chain Kit AFAM extra reinforced 14x42 KTM Duke 200 / RC 200 after 2014

107,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 17x40 Aprilia RS125 2006 - 2010
Article no.: AFAMKS-A-182

Chain Kit AFAM 17x40 Aprilia RS125 2006 - 2010

92,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 16x59 Yamaha XVS 125
Article no.: AFAMKS-A-27

Chain Kit AFAM 16x59 Yamaha XVS 125

103,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 16x57 Yamaha DT 125R
Article no.: AFAMKS-A-26

Chain Kit AFAM 16x57 Yamaha DT 125R

91,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 16x47 Kymco Stryker 125
Article no.: AFAMKS-A-61

Chain Kit AFAM 16x47 Kymco Stryker 125

43,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 16x41 Kymco Pulsar 125 II / Pulsar 125 M
Article no.: AFAMKS-A-9

Chain Kit AFAM 16x41 Kymco Pulsar 125 II / Pulsar 125 M

38,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 16x41 Kymco Hipster 125 2V / Meteorit 125 / Zing 125
Article no.: AFAMKS-A-60

Chain Kit AFAM 16x41 Kymco Hipster 125 2V / Meteorit 125 / Zing 125

81,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 16x40 KTM Duke 690 / 790
Article no.: AFAMKS-A-157

Chain Kit AFAM 16x40 KTM Duke 690 / 790

94,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 15x45 KTM Duke / RC 390 after 2014
Article no.: AFAMKS-A-155

Chain Kit AFAM 15x45 KTM Duke / RC 390 after 2014

103,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 15x38 Kymco Sector 125
Article no.: AFAMKS-A-4

Chain Kit AFAM 15x38 Kymco Sector 125

36,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 15x38 Kymco CK 1
Article no.: AFAMKS-A-5

Chain Kit AFAM 15x38 Kymco CK 1

39,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 15x38 Honda TRX 400 EX 1999 - 2004
Article no.: AFAMKS-A-16

Chain Kit AFAM 15x38 Honda TRX 400 EX 1999 - 2004

83,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x58 Hyosung XRX 125 LC Enduro
Article no.: AFAMKS-A-42

Chain Kit AFAM 14x58 Hyosung XRX 125 LC Enduro

96,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x52 Cagiva Mito
Article no.: AFAMKS-A-71

Chain Kit AFAM 14x52 Cagiva Mito

47,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x51 Yamaha TW 125 before 2002
Article no.: AFAMKS-A-49

Chain Kit AFAM 14x51 Yamaha TW 125 before 2002

86,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x48 Yamaha XT 125 after 2005
Article no.: AFAMKS-A-33

Chain Kit AFAM 14x48 Yamaha XT 125 after 2005

43,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x48 Hyosung RT 125 Karion
Article no.: AFAMKS-A-55

Chain Kit AFAM 14x48 Hyosung RT 125 Karion

86,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x48 Hyosung GA 125 Cruise I before 1996
Article no.: AFAMKS-A-51

Chain Kit AFAM 14x48 Hyosung GA 125 Cruise I before 1996

43,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x47 Hyosung RX 125 SM
Article no.: AFAMKS-A-54

Chain Kit AFAM 14x47 Hyosung RX 125 SM

47,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x46 Hyosung GV 250
Article no.: AFAMKS-A-46

Chain Kit AFAM 14x46 Hyosung GV 250

96,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x45 Yamaha YBR 125 ED RE031
Article no.: AFAMKS-A-23

Chain Kit AFAM 14x45 Yamaha YBR 125 ED RE031

75,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x45 Yamaha YBR 125 / RE041 / RE051 / RE052 / RE054
Article no.: AFAMKS-A-32

Chain Kit AFAM 14x45 Yamaha YBR 125 / RE041 / RE051 / RE052 / RE054

75,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x45 KTM RC 125 after 2014
Article no.: AFAMKS-A-159

Chain Kit AFAM 14x45 KTM RC 125 after 2014

102,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x45 KTM Duke 125 before 2013
Article no.: AFAMKS-A-151

Chain Kit AFAM 14x45 KTM Duke 125 before 2013

96,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x43 Yamaha YBR 125
Article no.: AFAMKS-A-31

Chain Kit AFAM 14x43 Yamaha YBR 125

77,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x42 KTM Duke 200 2012 - 2013
Article no.: AFAMKS-A-162

Chain Kit AFAM 14x42 KTM Duke 200 2012 - 2013

93,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x42 KTM Duke 200 / RC 200 2014 - 2020
Article no.: AFAMKS-A-164

Chain Kit AFAM 14x42 KTM Duke 200 / RC 200 2014 - 2020

94,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x42 Aprilia Pegaso 125
Article no.: AFAMKS-A-180

Chain Kit AFAM 14x42 Aprilia Pegaso 125

87,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x39 Honda TRX 400 2005 - 2015
Article no.: AFAMKS-A-17

Chain Kit AFAM 14x39 Honda TRX 400 2005 - 2015

84,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x38 Honda TRX 450 R
Article no.: AFAMKS-A-14

Chain Kit AFAM 14x38 Honda TRX 450 R

83,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 14x30 Kymco Mxer 50
Article no.: AFAMKS-A-87

Chain Kit AFAM 14x30 Kymco Mxer 50

48,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 13x47 Yamaha XV 125 before 2001
Article no.: AFAMKS-A-50

Chain Kit AFAM 13x47 Yamaha XV 125 before 2001

96,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 12x47 Yamaha TZR avat 2000
Article no.: AFAMKS-A-100

Chain Kit AFAM 12x47 Yamaha TZR avat 2000

44,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 11x62 HM-Moto CRE
Article no.: AFAMKS-A-147

Chain Kit AFAM 11x62 HM-Moto CRE

83,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 11x60 Yamaha DT / Peugeot XP6
Article no.: AFAMKS-A-124

Chain Kit AFAM 11x60 Yamaha DT / Peugeot XP6

48,00 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 11x60 Motorhispania RX
Article no.: AFAMKS-A-135

Chain Kit AFAM 11x60 Motorhispania RX

53,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 11x53 Derbi Senda
Article no.: AFAMKS-A-75

Chain Kit AFAM 11x53 Derbi Senda

41,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 11x52 Motorhispania RX after 2007
Article no.: AFAMKS-A-133

Chain Kit AFAM 11x52 Motorhispania RX after 2007

47,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 11x51 Aprilia RX50 Racing
Article no.: AFAMKS-A-175

Chain Kit AFAM 11x51 Aprilia RX50 Racing

45,50 €
Ready for dispatch shortly
AFAM
Chain Kit AFAM 11x47 Aprilia RS before 2005
Article no.: AFAMKS-A-112

Chain Kit AFAM 11x47 Aprilia RS before 2005

44,00 €
Ready for dispatch shortly
AFAM
Rear Sprocket steel 62 teeth - 428 AFAM HM Derapage
Article no.: AFAM48200-62

Rear Sprocket steel 62 teeth - 428 AFAM HM Derapage

59,50 €
Ready for dispatch shortly
AFAM
Rear Sprocket steel 60 teeth - 420 Afam Rieju MRT
Article no.: AFAM47103-60

Rear Sprocket steel 60 teeth - 420 Afam Rieju MRT

25,50 €
Ready for dispatch shortly
AFAM
Rear Sprocket steel 59 teeth - 428 AFAM Yamaha XVS 125 / XVS 250
Article no.: AFAM12221-59

Rear Sprocket steel 59 teeth - 428 AFAM Yamaha XVS 125 / XVS 250

32,00 €
Ready for dispatch shortly
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51

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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