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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
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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Doppler
Chain reinforced 134 links D.420 Doppler chrome
Article no.: CGN501121

Chain reinforced 134 links D.420 Doppler chrome

30,50 €
In stock
Doppler
Chain reinforced 134 links D.420 Doppler gold
Article no.: CGN501122

Chain reinforced 134 links D.420 Doppler gold

25,00 €
In stock
Doppler
Chain reinforced 134 links D.420 Doppler red
Article no.: CGN501114

Chain reinforced 134 links D.420 Doppler red

29,50 €
In stock
Doppler
Chain reinforced 134 links D.420 Doppler black
Article no.: CGN501113

Chain reinforced 134 links D.420 Doppler black

30,50 €
In stock
Doppler
Chain reinforced 134 links D.420 Doppler yellow
Article no.: CGN501116

Chain reinforced 134 links D.420 Doppler yellow

30,50 €
In stock
Doppler
Chain reinforced 134 links D.420 Doppler blue
Article no.: CGN501115

Chain reinforced 134 links D.420 Doppler blue

30,50 €
In stock
Doppler
Chain reinforced 134 links D.420 Doppler white
Article no.: CGN501118

Chain reinforced 134 links D.420 Doppler white

30,50 €
In stock
Doppler
Chain Tensioner Doppler Alu red Rieju MRT
Article no.: CGN500944

Chain Tensioner Doppler Alu red Rieju MRT

25,50 €
In stock
Doppler
Chain Tensioner Doppler Alu black Rieju MRT
Article no.: CGN500945

Chain Tensioner Doppler Alu black Rieju MRT

25,50 €
In stock
Top Performances
Washers and Circlips (kit) gearbox Minareli AM6
Article no.: MF60.18860

Washers and Circlips (kit) gearbox Minareli AM6

32,00 €
In stock
Standard Parts
Rear Sprocket steel 53 teeth - 420 CPI SX / SM
Article no.: MF89.00372

Rear Sprocket steel 53 teeth - 420 CPI SX / SM

17,00 €
In stock
Sale
Standard Parts
Rear Sprocket steel 55 teeth - 420 Generic Trigger
Article no.: MF89.00393

Rear Sprocket steel 55 teeth - 420 Generic Trigger

30,00 €
In stock
AFAM
Chain Kit Afam 14x48 - 428 Rieju MRT / Yamaha DT
Article no.: AFAM22

Chain Kit Afam 14x48 - 428 Rieju MRT / Yamaha DT

57,00 €
In stock
AFAM
Chain Kit Afam 13x48 Derbi Fenix
Article no.: AFAM70

Chain Kit Afam 13x48 Derbi Fenix

55,50 €
In stock
RRP
111,00 €
-50% Discount
Standard Parts
Chain Kit 13x53 - 420 Derbi DRD Pro / Racing
Article no.: MF89.00222

Chain Kit 13x53 - 420 Derbi DRD Pro / Racing

39,00 €
In stock
Standard Parts
Chain Kit 11x53 - 420 D.108mm 6 holes Derbi GPR / Senda X-Treme
Article no.: MF89.00211

Chain Kit 11x53 - 420 D.108mm 6 holes Derbi GPR / Senda X-Treme

40,00 €
In stock
Standard Parts
Rear Sprocket reinforced 53 teeth - 420 Derbi Aprilia SX 50
Article no.: MF89.00444

Rear Sprocket reinforced 53 teeth - 420 Derbi Aprilia SX 50

40,50 €
In stock
Standard Parts
Rear Sprocket reinforced 53 teeth - 420 Rieju MRT
Article no.: MF89.00424

Rear Sprocket reinforced 53 teeth - 420 Rieju MRT

44,00 €
In stock
Standard Parts
Rear Sprocket reinforced 52 teeth - 420 Rieju MRT
Article no.: MF89.00423

Rear Sprocket reinforced 52 teeth - 420 Rieju MRT

40,50 €
In stock
Standard Parts
Rear Sprocket reinforced 62 teeth - 420 Derbi DRD Pro
Article no.: MF89.00435

Rear Sprocket reinforced 62 teeth - 420 Derbi DRD Pro

44,00 €
In stock
Standard Parts
Rear Sprocket reinforced 53 teeth - 420 Derbi DRD Pro
Article no.: MF89.00432

Rear Sprocket reinforced 53 teeth - 420 Derbi DRD Pro

40,50 €
In stock
Standard Parts
Rear Sprocket steel 71 teeth - 420 Rieju MRT
Article no.: MF89.00329

Rear Sprocket steel 71 teeth - 420 Rieju MRT

29,00 €
In stock
Standard Parts
Rear Sprocket steel 60 teeth - 420 Rieju MRT
Article no.: MF89.00327

Rear Sprocket steel 60 teeth - 420 Rieju MRT

29,00 €
In stock
Str8
Front Sprocket 420 red Derbi
Article no.: STR-71REDDERBI

Front Sprocket 420 red Derbi

10,50 €
In stock
Standard Parts
Front Sprocket 420 red Minarelli AM6
Article no.: STR-71REDAM6

Front Sprocket 420 red Minarelli AM6

from 10,50 €
In stock
Str8
Front Sprocket 420 orange Minarelli AM6
Article no.: STR-71ORANGEAM6

Front Sprocket 420 orange Minarelli AM6

from 9,10 €
In stock
Standard Parts
Front Sprocket 420 blue Derbi
Article no.: STR-71BLUEDERBI

Front Sprocket 420 blue Derbi

10,50 €
In stock
Str8
Front Sprocket 420 blue Minarelli AM6
Article no.: STR-71BLUEAM6

Front Sprocket 420 blue Minarelli AM6

from 8,80 €
In stock
Standard Parts
Rear Sprocket steel 52 teeth - 420 Sherco Enduro 50
Article no.: MF89.00365

Rear Sprocket steel 52 teeth - 420 Sherco Enduro 50

25,50 €
In stock
Standard Parts
Rear Sprocket steel 53 teeth - 420 Aprilia SX 50
Article no.: MF89.00344
1

Rear Sprocket steel 53 teeth - 420 Aprilia SX 50

25,00 €
In stock
Standard Parts
Rear Sprocket steel 50 teeth - 420 Aprilia SX 50
Article no.: MF89.00342

Rear Sprocket steel 50 teeth - 420 Aprilia SX 50

35,50 €
In stock
Standard Parts
Rear Sprocket steel 48 teeth - 420 Aprilia SX 50
Article no.: MF89.00341

Rear Sprocket steel 48 teeth - 420 Aprilia SX 50

33,50 €
In stock
Standard Parts
Rear Sprocket steel 53 teeth - 420 Rieju MRT
Article no.: MF89.00324

Rear Sprocket steel 53 teeth - 420 Rieju MRT

22,50 €
In stock
Standard Parts
Rear Sprocket steel 48 teeth - 420 Rieju MRT
Article no.: MF89.00321

Rear Sprocket steel 48 teeth - 420 Rieju MRT

25,50 €
In stock
Standard Parts
Rear Sprocket steel 52 teeth - 420 Peugeot / Rieju
Article no.: MF89.00310

Rear Sprocket steel 52 teeth - 420 Peugeot / Rieju

24,00 €
In stock
IGM
Rear Sprocket steel 46 teeth - 428 IGM Rieju MRT
Article no.: IGM87871

Rear Sprocket steel 46 teeth - 428 IGM Rieju MRT

14,00 €
In stock
19,50 €
-28% Discount
Sale
IGM
Rear Sprocket steel 44 teeth - 420 IGM Rieju MRT
Article no.: IGM85140

Rear Sprocket steel 44 teeth - 420 IGM Rieju MRT

19,50 €
In stock
IGM
Rear Sprocket steel 50 teeth - 420 IGM Rieju MRT
Article no.: IGM5681

Rear Sprocket steel 50 teeth - 420 IGM Rieju MRT

22,50 €
In stock
IGM
Rear Sprocket steel 46 teeth - 420 IGM Rieju MRT
Article no.: IGM5679

Rear Sprocket steel 46 teeth - 420 IGM Rieju MRT

20,50 €
In stock
IGM
Rear Sprocket steel 65 teeth - 420 IGM Rieju MRT
Article no.: IGM13101205

Rear Sprocket steel 65 teeth - 420 IGM Rieju MRT

17,00 €
In stock
AFAM
Chain Kit AFAM 12x51 - 420 Beta RR after 2005
Article no.: AFAM500353

Chain Kit AFAM 12x51 - 420 Beta RR after 2005

57,50 €
In stock
AFAM
Chain Kit AFAM 12x52 - 420 Rieju MRT / Yamaha DT
Article no.: AFAM467442

Chain Kit AFAM 12x52 - 420 Rieju MRT / Yamaha DT

56,50 €
In stock
Standard Parts
Chain Tensioner complete Motor Hispania Furia Cross
Article no.: SP-0016057

Chain Tensioner complete Motor Hispania Furia Cross

13,50 €
In stock
Standard Parts
Front Sprocket 13 teeth 420 Derbi Euro2 before 1999
Article no.: L-SA3692

Front Sprocket 13 teeth 420 Derbi Euro2 before 1999

8,00 €
In stock
Standard Parts
Reinforced Chain 134 links size=420
Article no.: CGN475169

Reinforced Chain 134 links size=420

21,00 €
In stock
Derbi
Chain Guard Derbi Senda DRD Pro / X-Treme
Article no.: OE-DE00H01508181

Chain Guard Derbi Senda DRD Pro / X-Treme

35,00 €
In stock
Piaggio
Bleeder Tube gear box Piaggio / Vespa
Article no.: OE-PIACM162202

Bleeder Tube gear box Piaggio / Vespa

17,50 €
In stock
Derbi
Swingarm Slider Derbi Senda / Gilera SMT
Article no.: OE-DE00H01803331

Swingarm Slider Derbi Senda / Gilera SMT

25,50 €
In stock
Standard Parts
Gearbox / Gear Drive OEM quality Minarelli AM6
Article no.: EKP-138731

Gearbox / Gear Drive OEM quality Minarelli AM6

177,00 €
In stock
Doppler
Rear Sprocket 53 teeth / 428 chain Doppler CNC aluminium red Beta RR
Article no.: CGN496464
1

Rear Sprocket 53 teeth / 428 chain Doppler CNC aluminium red Beta RR

54,50 €
In stock
Doppler
Rear Sprocket 53 teeth - 428 Doppler aluminium CNC red Sherco Enduro 50
Article no.: CGN496462
2

Rear Sprocket 53 teeth - 428 Doppler aluminium CNC red Sherco Enduro 50

61,00 €
In stock
Sale
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC red Aprilia SX 50
Article no.: CGN492590

Rear Sprocket 53 teeth - 420 Doppler aluminium CNC red Aprilia SX 50

54,50 €
In stock
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC red Rieju MRT
Article no.: CGN491212

Rear Sprocket 53 teeth - 420 Doppler aluminium CNC red Rieju MRT

51,00 €
In stock
Sale
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC gold Rieju MRT
Article no.: CGN491209

Rear Sprocket 53 teeth - 420 Doppler aluminium CNC gold Rieju MRT

51,00 €
In stock
Sale
Standard Parts
Sprocket Washer Zündapp 4-speed
Article no.: 31525

Sprocket Washer Zündapp 4-speed

0,80 €
In stock
Standard Parts
Chain Pulley Set Aprilia / CPI / Derbi / Gilera
Article no.: 34935

Chain Pulley Set Aprilia / CPI / Derbi / Gilera

9,00 €
In stock
Standard Parts
Chain Tensioners (x2) Tomos A3 / A35
Article no.: 28790

Chain Tensioners (x2) Tomos A3 / A35

5,50 €
In stock
Standard Parts
Secondary Gears / Output Shaft long - GY6 50cc 139QMB
Article no.: BT16623

Secondary Gears / Output Shaft long - GY6 50cc 139QMB

14,00 €
In stock
Rieju
Gear Shift Shaft original spare part Rieju RS2
Article no.: OE-RIE2407000

Gear Shift Shaft original spare part Rieju RS2

6,00 €
In stock
Sale
AFAM
Rear Sprocket AFAM 51 teeth - 420 Beta RR / Caballero
Article no.: CGN495148
1

Rear Sprocket AFAM 51 teeth - 420 Beta RR / Caballero

29,00 €
In stock
Sale
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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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