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Bracket Bushings & Spacers Chain Chain accessories Chain guard Chain guide Chain kit Chain master link Chain roller Chain slider Chain tensioner Circlip Clutch accessories Clutch gear Clutch kit Clutch release lever Clutch springs CVT sliders Fairing Front sprocket Gearbox Gearbox accessories Gearbox bearing kit Gearshift lever Ignition lock Needle bearing Oil seal kit Pulley Pulley gear Chain rear sprocket Repair kit Spring Transmission Transmission accessories Transmission gear Washer Wheel axle Woodruff key Bearing ball Cable guide Fuel cap Gear selector shaft Overflow hose Pedal shaft Sprocket screws
Brand
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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Moto Master
Front Sprocket Moto Master 520 13 teeth Sherco SE-F 250 / 300
Article no.: MMAST-12121543

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

16,00 €
Currently not in stock
Moto Master
Front Sprocket Moto Master 520 13 teeth YZF 250 / 450
Article no.: MMAST-12121476

Front Sprocket Moto Master 520 13 teeth YZF 250 / 450

16,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 48 teeth blue TM Racing MX / EN
Article no.: MMAST-12112455

Rear Sprocket Moto Master 520 aluminium 48 teeth blue TM Racing MX / EN

49,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 51 teeth blue YZ / YZF
Article no.: MMAST-12112312

Rear Sprocket Moto Master 520 aluminium 51 teeth blue YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 45 teeth blue YZ / YZF
Article no.: MMAST-12112306

Rear Sprocket Moto Master 520 aluminium 45 teeth blue YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 53 teeth black YZ / YZF
Article no.: MMAST-12112301

Rear Sprocket Moto Master 520 aluminium 53 teeth black YZ / YZF

60,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 50 teeth black YZ / YZF
Article no.: MMAST-12112298

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

51,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 48 teeth black YZ / YZF
Article no.: MMAST-12112296

Rear Sprocket Moto Master 520 aluminium 48 teeth black YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 420 aluminium 55 teeth red CR 85 / CRF 150
Article no.: MMAST-12112121

Rear Sprocket Moto Master 420 aluminium 55 teeth red CR 85 / CRF 150

51,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 steel 47 teeth KTM / Husqvarna
Article no.: MMAST-12102302

Rear Sprocket Moto Master 520 steel 47 teeth KTM / Husqvarna

50,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 steel 48 teeth YZ / YZF
Article no.: MMAST-12102267

Rear Sprocket Moto Master 520 steel 48 teeth YZ / YZF

45,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 steel 44 teeth KX /KXF
Article no.: MMAST-12102244

Rear Sprocket Moto Master 520 steel 44 teeth KX /KXF

45,00 €
Currently not in stock
Renthal
Chain 420 R1 Works 120 links
Article no.: REN-R1420120

Chain 420 R1 Works 120 links

37,00 €
Currently not in stock
Renthal
Chain R3-3 520 Off Road 118 links
Article no.: REN-12240205

Chain R3-3 520 Off Road 118 links

141,00 €
Currently not in stock
Renthal
Front Sprocket Renthal 520 Z.12 self-cleaning Kawasaki KX 125
Article no.: REN-R33752012

Front Sprocket Renthal 520 Z.12 self-cleaning Kawasaki KX 125

25,00 €
Currently not in stock
Renthal
Rear Sprocket Renthal 520 Z.53 Ultra Light self-cleaning CR / CRF
Article no.: REN-R15453

Rear Sprocket Renthal 520 Z.53 Ultra Light self-cleaning CR / CRF

59,00 €
Currently not in stock
Renthal
Rear Sprocket Renthal 520 Z.42 Ultra Light self-cleaning orange KTM / Husqvarna / GasGas
Article no.: REN-12112469

Rear Sprocket Renthal 520 Z.42 Ultra Light self-cleaning orange KTM / Husqvarna / GasGas

55,50 €
Currently not in stock
Renthal
Rear Sprocket Renthal 520 Z.51 Ultra Light self-cleaning blue YZ / YZF
Article no.: REN-12110167

Rear Sprocket Renthal 520 Z.51 Ultra Light self-cleaning blue YZ / YZF

58,50 €
Currently not in stock
Renthal
Rear Sprocket Renthal 520 Z.51 Ultra Light self-cleaning red CR / CRF
Article no.: REN-12110162

Rear Sprocket Renthal 520 Z.51 Ultra Light self-cleaning red CR / CRF

69,50 €
Currently not in stock
Renthal
Rear Sprocket Renthal 520 Z.53 Ultra Light self-cleaning KTM / Husqvarna / GasGas
Article no.: REN-12110104

Rear Sprocket Renthal 520 Z.53 Ultra Light self-cleaning KTM / Husqvarna / GasGas

59,00 €
Currently not in stock
Renthal
Rear Sprocket Renthal 520 Z.45 Ultra Light self-cleaning KTM / Husqvarna / GasGas
Article no.: REN-12110078

Rear Sprocket Renthal 520 Z.45 Ultra Light self-cleaning KTM / Husqvarna / GasGas

50,50 €
Currently not in stock
Renthal
Rear Sprocket Renthal 520 Z.52 Ultra Light self-cleaning black KTM / Husqvarna / GasGas
Article no.: REN-12110049

Rear Sprocket Renthal 520 Z.52 Ultra Light self-cleaning black KTM / Husqvarna / GasGas

63,00 €
Currently not in stock
Renthal
Rear Sprocket Renthal 520 Z.49 Ultra Light self-cleaning black KTM / Husqvarna / GasGas
Article no.: REN-12110046

Rear Sprocket Renthal 520 Z.49 Ultra Light self-cleaning black KTM / Husqvarna / GasGas

58,50 €
Currently not in stock
Standard Parts
Gear Shift Spring Simson
Article no.: MOF-41286

Gear Shift Spring Simson

2,00 €
Currently not in stock
Standard Parts
Chain Master Link 1/2x5.4 Simson
Article no.: MOF-40815

Chain Master Link 1/2x5.4 Simson

1,20 €
Currently not in stock
AFAM
Front Sprocket Afam 13 teeth Beta RR LC
Article no.: 1075314001

Front Sprocket Afam 13 teeth Beta RR LC

6,30 €
Currently not in stock
AFAM
Front Sprocket Afam 13 teeth SMS 125
Article no.: 1077127002

Front Sprocket Afam 13 teeth SMS 125

16,50 €
Currently not in stock
AFAM
Front Sprocket Afam 14 teeth XTX 660
Article no.: 1075501001

Front Sprocket Afam 14 teeth XTX 660

19,50 €
Currently not in stock
AFAM
Front Sprocket AFAM 16 teeth 520 KTM 350 / 400 / 620 / 640 / 660 / 690 / 790
Article no.: AFAM73303-16

Front Sprocket AFAM 16 teeth 520 KTM 350 / 400 / 620 / 640 / 660 / 690 / 790

15,00 €
Currently not in stock
AFAM
Front Sprocket AFAM 15 teeth 520 Kymco KXR / Maxxer / MXU 250/300
Article no.: AFAM76300-15

Front Sprocket AFAM 15 teeth 520 Kymco KXR / Maxxer / MXU 250/300

14,50 €
Currently not in stock
AFAM
Front Sprocket AFAM 13 teeth 520 Kymco KXR / Maxxer / MXU 250/300 / TGB Blade / Target
Article no.: AFAM76300-13

Front Sprocket AFAM 13 teeth 520 Kymco KXR / Maxxer / MXU 250/300 / TGB Blade / Target

14,50 €
Currently not in stock
15,00 €
-3% Discount
AFAM
Front Sprocket AFAM 13 teeth 428 Yamaha / Beta / HM / Rieju 125cc
Article no.: AFAM21208-13

Front Sprocket AFAM 13 teeth 428 Yamaha / Beta / HM / Rieju 125cc

5,80 €
Currently not in stock
AFAM
Front Sprocket AFAM 13 teeth 420 Derbi Senda / GPR
Article no.: AFAM49100-13

Front Sprocket AFAM 13 teeth 420 Derbi Senda / GPR

7,30 €
Currently not in stock
AFAM
Chain Kit AFAM XS-Ring 13x60 Aprilia RS125 after 2011 / Tuono 125 after 2017
Article no.: AFAMKS-A-184

Chain Kit AFAM XS-Ring 13x60 Aprilia RS125 after 2011 / Tuono 125 after 2017

98,00 €
Currently not in stock
AFAM
Chain Kit AFAM 14x63 Beta RR 125 LC Motard / Enduro
Article no.: AFAMKS-A-39

Chain Kit AFAM 14x63 Beta RR 125 LC Motard / Enduro

59,00 €
Currently not in stock
60,00 €
-2% Discount
AFAM
Chain Kit AFAM 13x69 Aprilia RX125
Article no.: AFAMKS-A-189

Chain Kit AFAM 13x69 Aprilia RX125

59,00 €
Currently not in stock
AFAM
Chain Kit AFAM 13x48 Yamaha DT 1993 - 1997
Article no.: AFAMKS-A-64

Chain Kit AFAM 13x48 Yamaha DT 1993 - 1997

39,50 €
Currently not in stock
AFAM
Chain Kit AFAM 13x38 Honda TRX 250 X
Article no.: AFAMKS-A-11

Chain Kit AFAM 13x38 Honda TRX 250 X

74,50 €
Currently not in stock
AFAM
Chain Kit AFAM 12x60 - 428 Sherco before 2016
Article no.: AFAMKS-A-102

Chain Kit AFAM 12x60 - 428 Sherco before 2016

60,50 €
Currently not in stock
AFAM
Rear Sprocket steel 60 teeth - 428 Afam Sherco Enduro 50
Article no.: AFAM59104-60

Rear Sprocket steel 60 teeth - 428 Afam Sherco Enduro 50

32,00 €
Currently not in stock
AFAM
Rear Sprocket steel 59 teeth - 420 Afam Derbi DRD Pro
Article no.: AFAM41100-59

Rear Sprocket steel 59 teeth - 420 Afam Derbi DRD Pro

21,50 €
Currently not in stock
AFAM
Rear Sprocket steel 56 teeth - 428 Afam Rieju MRT
Article no.: AFAM47200-56

Rear Sprocket steel 56 teeth - 428 Afam Rieju MRT

31,50 €
Currently not in stock
AFAM
Rear Sprocket steel 51 teeth - 420 AFAM Beta RR
Article no.: AFAM38101-51

Rear Sprocket steel 51 teeth - 420 AFAM Beta RR

21,50 €
Currently not in stock
AFAM
Rear Sprocket steel 47 teeth - 420 AFAM Aprilia RS
Article no.: AFAM35104-47

Rear Sprocket steel 47 teeth - 420 AFAM Aprilia RS

25,00 €
Currently not in stock
AFAM
Chain AFAM XS-Ring reinforced gold 428 XMR-G 146 links
Article no.: AFAM428XMR-G-146

Chain AFAM XS-Ring reinforced gold 428 XMR-G 146 links

71,00 €
Currently not in stock
73,50 €
-3% Discount
AFAM
Chain Rivet Master Link AFAM reinforced gold A420 R1-G
Article no.: AFAM420R1-G

Chain Rivet Master Link AFAM reinforced gold A420 R1-G

2,00 €
Currently not in stock
Moose Racing
RXP Pro-MX 428 Chain Moose Racing
Article no.: MRM57500_MASTER

RXP Pro-MX 428 Chain Moose Racing

from 31,50 €
Currently not in stock
Piaggio
Input Shaft clutch Piaggio Zip2 after 2006
Article no.: OE-PIA4795934

Input Shaft clutch Piaggio Zip2 after 2006

177,00 €
Currently not in stock
YCF
Chain Tensioners d.15mm Pit Bike YCF Lite
Article no.: YCF-110-1016-01

Chain Tensioners d.15mm Pit Bike YCF Lite

13,00 €
Currently not in stock
YCF
Chain Tensioners d.15mm YCF Pit Bike / Dirt Bike
Article no.: YCF-110-11-09

Chain Tensioners d.15mm YCF Pit Bike / Dirt Bike

16,50 €
Currently not in stock
YCF
Rear Sprocket steel 420 - 41 teeth - 5 screws Pit Bike YCF
Article no.: YCF-110-11-062-41

Rear Sprocket steel 420 - 41 teeth - 5 screws Pit Bike YCF

16,00 €
Currently not in stock
YCF
Rear Sprocket steel 420 - 41 teeth - 4 screws Pit Bike YCF
Article no.: YCF-110-11-06-41

Rear Sprocket steel 420 - 41 teeth - 4 screws Pit Bike YCF

16,00 €
Currently not in stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 45 teeth - 4 screws YCF Pit Bike silver
Article no.: MBCA06R.45SI

Rear Sprocket aluminium CNC 420 - 45 teeth - 4 screws YCF Pit Bike silver

41,50 €
Currently not in stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 39 teeth - 4 screws YCF Pit Bike red
Article no.: MBCA06R.39RD

Rear Sprocket aluminium CNC 420 - 39 teeth - 4 screws YCF Pit Bike red

41,50 €
Currently not in stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 39 teeth - 4 screws YCF Pit Bike blue
Article no.: MBCA06R.39BL

Rear Sprocket aluminium CNC 420 - 39 teeth - 4 screws YCF Pit Bike blue

41,50 €
Currently not in stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 39 teeth - 4 screws YCF Pit Bike silver
Article no.: MBCA06R.39SI

Rear Sprocket aluminium CNC 420 - 39 teeth - 4 screws YCF Pit Bike silver

41,50 €
Currently not in stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 37 teeth - 4 screws YCF Pit Bike black
Article no.: MBCA06R.37BK

Rear Sprocket aluminium CNC 420 - 37 teeth - 4 screws YCF Pit Bike black

41,50 €
Currently not in stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 37 teeth - 4 screws YCF Pit Bike blue
Article no.: MBCA06R.37BL

Rear Sprocket aluminium CNC 420 - 37 teeth - 4 screws YCF Pit Bike blue

41,50 €
Currently not in stock
YCF
Chain Guard Pit Bike YCF 50 cc
Article no.: YCF-50-0600-02

Chain Guard Pit Bike YCF 50 cc

16,50 €
Currently not in stock
Standard Parts
Pedal Shaft Puch Maxi NM
Article no.: MOF-40226

Pedal Shaft Puch Maxi NM

24,00 €
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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