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Transmission

(614 products)
50cc Bike Gearboxes Chains and Sprockets Gear Drives Transmission Accessories
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Product type
Chain Chain accessories Chain guard Chain guide Chain kit Chain master link Chain roller Chain slider Chain tensioner Clutch accessories Clutch kit Crankshaft accessories Front sprocket Gearbox Gearbox accessories Gearbox bearing kit Kickstarter accessories Chain rear sprocket Screws other Transmission Transmission accessories Transmission gear
Brand
AFAM Avoc Beta Bidalot Conti Derbi Doppler IGM Jasil KRM Moose Racing MotoForce MotoForce Racing Piaggio Polisport Rieju Stage6 Standard Parts STR8 Top Performances Voca Racing Yamaha
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Standard Parts
Screw M8x1.00 - 40mm Rieju
Article no.: MF96.90050

Screw M8x1.00 - 40mm Rieju

1,50 €
In stock
Derbi
Swingarm Slider aluminium Derbi Senda / Gilera SMT
Article no.: OE-DE00H01804331

Swingarm Slider aluminium Derbi Senda / Gilera SMT

14,50 €
In stock
Doppler
Chain Kit aluminium red 14x53 - 420 Doppler Derbi GPR / Aprilia RS4
Article no.: CGN492591

Chain Kit aluminium red 14x53 - 420 Doppler Derbi GPR / Aprilia RS4

99,00 €
In stock
AFAM
Chain reinforced 134 links 428 gold
Article no.: AFAM485375

Chain reinforced 134 links 428 gold

28,50 €
In stock
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

24,50 €
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 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

31,00 €
In stock
Doppler
Front Sprocket Cover / Chain Guard aluminium silver Doppler Minarelli AM6
Article no.: CGN497436

Front Sprocket Cover / Chain Guard aluminium silver Doppler Minarelli AM6

20,00 €
In stock
Doppler
Front Sprocket Cover / Chain Guard aluminium black Doppler Minarelli AM6
Article no.: CGN497434
1

Front Sprocket Cover / Chain Guard aluminium black Doppler Minarelli AM6

20,00 €
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

19,00 €
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

55,50 €
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 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
Str8
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
Str8
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 53 teeth - 420 orange Rieju MRT
Article no.: STR-701.53/OR

Rear Sprocket 53 teeth - 420 orange Rieju MRT

28,50 €
In stock
Standard Parts
Rear Sprocket 53 teeth - 420 blue Rieju MRT
Article no.: STR-701.53/BL

Rear Sprocket 53 teeth - 420 blue Rieju MRT

28,50 €
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

26,00 €
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

19,50 €
In stock
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
Top Performances
Top Performances Kickstart Shaft Top Performances Minarelli AM6
Article no.: TAM00030
1

Top Performances Kickstart Shaft Top Performances Minarelli AM6

49,00 €
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 Tensioner (x1) Derbi DRD Racing
Article no.: OE-DE00H01304811

Chain Tensioner (x1) Derbi DRD Racing

49,50 €
In stock
Derbi
Chain Tensioner Derbi Senda DRD X-Treme after 2010
Article no.: OE-DE00H01305171

Chain Tensioner Derbi Senda DRD X-Treme after 2010

16,50 €
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
Polisport
Roller for chain tensioner Polisport d.42mm black
Article no.: EKP-143574

Roller for chain tensioner Polisport d.42mm black

14,00 €
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

64,50 €
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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