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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 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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AFAM
Front Sprocket Afam 11 teeth KX 125
Article no.: 1076174001

Front Sprocket Afam 11 teeth KX 125

13,50 €
Currently not in stock
AFAM
Front Sprocket 415 Afam 11 teeth KTM / Husqvarna 50
Article no.: 1077167002

Front Sprocket 415 Afam 11 teeth KTM / Husqvarna 50

12,50 €
Currently not in stock
AFAM
Front Sprocket Afam 12 teeth YZ 125 1990-2004
Article no.: 1075303003

Front Sprocket Afam 12 teeth YZ 125 1990-2004

14,00 €
Currently not in stock
AFAM
Front Sprocket Afam 16 teeth Kawasaki / Yamaha
Article no.: 1076710007

Front Sprocket Afam 16 teeth Kawasaki / Yamaha

15,50 €
Currently not in stock
AFAM
Front Sprocket Afam 12 teeth SMS 125
Article no.: 1077127001

Front Sprocket Afam 12 teeth SMS 125

16,00 €
Currently not in stock
AFAM
Front Sprocket 420 Afam 16 teeth KX 65 / 85
Article no.: 1076683005

Front Sprocket 420 Afam 16 teeth KX 65 / 85

8,10 €
Currently not in stock
AFAM
Front Sprocket Afam 15 teeth Husqvarna CR / WR 250 1991-1998
Article no.: 1076207002

Front Sprocket Afam 15 teeth Husqvarna CR / WR 250 1991-1998

19,50 €
Currently not in stock
AFAM
Front Sprocket Afam 10 teeth Yamaha / GasGas
Article no.: 1075303001

Front Sprocket Afam 10 teeth Yamaha / GasGas

13,00 €
Currently not in stock
AFAM
Front Sprocket Afam 13 teeth KXF / RM-Z 250
Article no.: 1076240001

Front Sprocket Afam 13 teeth KXF / RM-Z 250

16,00 €
Currently not in stock
AFAM
Front Sprocket Afam 14 teeth Husqvarna TC / TE 250 - 450
Article no.: 1077133003

Front Sprocket Afam 14 teeth Husqvarna TC / TE 250 - 450

18,00 €
Currently not in stock
AFAM
Front Sprocket Afam 13 teeth Honda CR 250 / CRF 450
Article no.: 1074754002

Front Sprocket Afam 13 teeth Honda CR 250 / CRF 450

15,50 €
Currently not in stock
AFAM
Front Sprocket Afam 15 teeth Kawasaki
Article no.: 1076710006

Front Sprocket Afam 15 teeth Kawasaki

15,00 €
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
Front Sprocket Afam 14 teeth RM-Z 450
Article no.: 1075953002

Front Sprocket Afam 14 teeth RM-Z 450

17,00 €
Currently not in stock
AFAM
Front Sprocket Afam 13 teeth TC 250
Article no.: 1077132002

Front Sprocket Afam 13 teeth TC 250

14,00 €
Currently not in stock
AFAM
Front Sprocket Afam 15 teeth 690 SMC
Article no.: 1077141003

Front Sprocket Afam 15 teeth 690 SMC

18,00 €
Currently not in stock
AFAM
Front Sprocket Afam 12 teeth YZ / YZF
Article no.: 1076567001

Front Sprocket Afam 12 teeth YZ / YZF

15,00 €
Currently not in stock
AFAM
Front Sprocket Afam 13 teeth YZ 85
Article no.: 1075279001

Front Sprocket Afam 13 teeth YZ 85

7,10 €
Currently not in stock
AFAM
Front Sprocket Afam 12 teeth TC 250
Article no.: 1077132001

Front Sprocket Afam 12 teeth TC 250

14,00 €
Currently not in stock
AFAM
Front Sprocket Afam 13 teeth Suzuki RM 125
Article no.: 1075810002

Front Sprocket Afam 13 teeth Suzuki RM 125

15,50 €
Currently not in stock
AFAM
Front Sprocket Afam 12 teeth KX 125
Article no.: 1076174002

Front Sprocket Afam 12 teeth KX 125

14,00 €
Currently not in stock
AFAM
Front Sprocket Afam 15 teeth Husqvarna CR 250 / WR 300 1999-2013
Article no.: 1077133004

Front Sprocket Afam 15 teeth Husqvarna CR 250 / WR 300 1999-2013

19,00 €
Currently not in stock
AFAM
Front Sprocket Afam 13 teeth TM MX / EN 250
Article no.: 1077177001

Front Sprocket Afam 13 teeth TM MX / EN 250

18,00 €
Currently not in stock
AFAM
Chain Afam A415GPR2-G 120 links press-fit master link
Article no.: 1077250001

Chain Afam A415GPR2-G 120 links press-fit master link

89,00 €
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 520 type XRR3 13/48 (ultra-light rear sprocket) Gas Gas EC 300
Article no.: 40600074

Chain Kit Afam 520 type XRR3 13/48 (ultra-light rear sprocket) Gas Gas EC 300

157,00 €
Currently not in stock
AFAM
Chain Kit Afam 520 type XRR3 12/50 (ultra-light rear sprocket) Gas Gas EC 200
Article no.: 40600073

Chain Kit Afam 520 type XRR3 12/50 (ultra-light rear sprocket) Gas Gas EC 200

158,00 €
Currently not in stock
AFAM
Chain Kit Afam 520 type XRR3 14/49 (ultra-light self-cleaning rear sprocket) Beta RR 200 2T
Article no.: 40600072

Chain Kit Afam 520 type XRR3 14/49 (ultra-light self-cleaning rear sprocket) Beta RR 200 2T

161,00 €
Currently not in stock
AFAM
Chain Kit Afam 520 type XRR3 13/50 (ultra-light self-cleaning rear sprocket) Beta RR 125 2T Enduro
Article no.: 40600071

Chain Kit Afam 520 type XRR3 13/50 (ultra-light self-cleaning rear sprocket) Beta RR 125 2T Enduro

160,00 €
Currently not in stock
AFAM
Front Sprocket AFAM 17 teeth 525 KTM 950 / 990 / 1050 / 1090 / 1190 / 1290
Article no.: AFAM61800-17

Front Sprocket AFAM 17 teeth 525 KTM 950 / 990 / 1050 / 1090 / 1190 / 1290

18,00 €
Currently not in stock
AFAM
Front Sprocket AFAM 17 teeth 520 Honda NC750
Article no.: AFAM20617-17

Front Sprocket AFAM 17 teeth 520 Honda NC750

18,00 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
AFAM
Front Sprocket AFAM 13 teeth 420 Morini
Article no.: AFAM58102-13

Front Sprocket AFAM 13 teeth 420 Morini

7,70 €
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 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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
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 €
Currently not in stock
AFAM
Chain Kit AFAM 17x40 Aprilia RS125 2006 - 2010
Article no.: AFAMKS-A-182

Chain Kit AFAM 17x40 Aprilia RS125 2006 - 2010

92,50 €
Currently not in stock
AFAM
Chain Kit AFAM 16x59 Yamaha XVS 125
Article no.: AFAMKS-A-27

Chain Kit AFAM 16x59 Yamaha XVS 125

103,00 €
Currently not in stock
AFAM
Chain Kit AFAM 16x57 Yamaha DT 125R
Article no.: AFAMKS-A-26

Chain Kit AFAM 16x57 Yamaha DT 125R

91,50 €
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 16x47 Kymco Stryker 125
Article no.: AFAMKS-A-61

Chain Kit AFAM 16x47 Kymco Stryker 125

43,00 €
Currently not in stock
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 €
Currently not in stock
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 €
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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