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Transmission

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Product type
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
Price
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AFAM
Chain Master Link Afam 428 gold
Article no.: AFAM485376

Chain Master Link Afam 428 gold

2,40 €
In stock
AFAM
Chain Master Link Afam 420 gold
Article no.: AFAM483128

Chain Master Link Afam 420 gold

2,60 €
In stock
Standard Parts
Rear Sprocket steel 48 teeth - 420 CPI SX / SM
Article no.: MF89.00370

Rear Sprocket steel 48 teeth - 420 CPI SX / SM

15,00 €
In stock
AFAM
Rear Sprocket 53 teeth - 420 Afam Generic Trigger
Article no.: AFAM35103-53

Rear Sprocket 53 teeth - 420 Afam Generic Trigger

25,00 €
In stock
AFAM
Rear Sprocket 51 teeth - 420 Afam Generic Trigger
Article no.: AFAM35103-51

Rear Sprocket 51 teeth - 420 Afam Generic Trigger

25,00 €
In stock
Polini
Gear Selector 4-speed Polini (H=51mm) Vespa Primavera 50 - 125cc ET3 before 1979
Article no.: P230.0405

Gear Selector 4-speed Polini (H=51mm) Vespa Primavera 50 - 125cc ET3 before 1979

100,00 €
In stock
RRP
113,00 €
-12% Discount
Sale
Doppler
Chain Master Link Doppler 428
Article no.: CGN5045_CHAINLINK428COLOR
2

Chain Master Link Doppler 428

3,00 €
In stock
3,20 €
-6% Discount
Doppler
Chain Master Link Doppler 420
Article no.: CGN5045_CHAINLINK420COLOR

Chain Master Link Doppler 420

1,20 €
In stock
2,40 €
-50% Discount
Doppler
Chain Master Link Doppler 420 black
Article no.: CGN504529

Chain Master Link Doppler 420 black

3,00 €
In stock
3,20 €
-6% Discount
Doppler
Chain reinforced 138 links D.428 orange
Article no.: CGN503983

Chain reinforced 138 links D.428 orange

25,00 €
In stock
Doppler
Chain reinforced 138 links D.428 blue
Article no.: CGN503982

Chain reinforced 138 links D.428 blue

25,00 €
In stock
27,00 €
-7% Discount
Doppler
Chain reinforced 138 links D.428 red
Article no.: CGN503981

Chain reinforced 138 links D.428 red

25,00 €
In stock
31,00 €
-19% Discount
Doppler
Chain reinforced 138 links D.428 gold
Article no.: CGN503614

Chain reinforced 138 links D.428 gold

21,00 €
In stock
28,00 €
-25% Discount
Standard Parts
Chain reinforced 130 links D.420 black
Article no.: MF89.00140

Chain reinforced 130 links D.420 black

13,00 €
In stock
Standard Parts
Chain Guide Derbi / Aprilia / Gilera red
Article no.: MF89.00192
1

Chain Guide Derbi / Aprilia / Gilera red

26,00 €
In stock
Standard Parts
Chain Guide Derbi / Aprilia / Gilera blue
Article no.: MF89.00191

Chain Guide Derbi / Aprilia / Gilera blue

26,00 €
In stock
Standard Parts
Rear Sprocket 48 teeth - 420 Rieju MRT
Article no.: EKP-149076

Rear Sprocket 48 teeth - 420 Rieju MRT

27,50 €
In stock
Doppler
Rear Sprocket 53 teeth - 428 Doppler aluminium CNC black Beta RR
Article no.: CGN500931

Rear Sprocket 53 teeth - 428 Doppler aluminium CNC black Beta RR

54,50 €
In stock
RRP
60,00 €
-9% Discount
Doppler
Rear Sprocket 53 teeth - 428 Doppler aluminium CNC black Sherco Enduro 50
Article no.: CGN500923

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

55,00 €
In stock
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC black Rieju MRT
Article no.: CGN500921

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

46,00 €
In stock
Rieju
Swingarm Slider Rieju 50cc / 125cc
Article no.: OE-RIE7100302

Swingarm Slider Rieju 50cc / 125cc

9,40 €
In stock
Standard Parts
Screw M8x1.00 - 40mm Rieju
Article no.: MF96.90050

Screw M8x1.00 - 40mm Rieju

1,60 €
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

80,00 €
In stock
RRP
89,00 €
-10% Discount
Sale
AFAM
Chain reinforced 134 links 428 gold
Article no.: AFAM485375

Chain reinforced 134 links 428 gold

28,50 €
In stock
AFAM
Chain reinforced Racing 134 links 420 gold
Article no.: AFAM485374

Chain reinforced Racing 134 links 420 gold

46,00 €
In stock
Doppler
Chain reinforced 134 links D.420 Doppler gold
Article no.: CGN501122

Chain reinforced 134 links D.420 Doppler gold

21,00 €
In stock
22,00 €
-5% Discount
Doppler
Chain reinforced 134 links D.420 Doppler red
Article no.: CGN501114

Chain reinforced 134 links D.420 Doppler red

25,00 €
In stock
26,00 €
-4% Discount
Doppler
Chain reinforced 134 links D.420 Doppler black
Article no.: CGN501113

Chain reinforced 134 links D.420 Doppler black

25,00 €
In stock
27,00 €
-7% Discount
Doppler
Chain reinforced 134 links D.420 Doppler yellow
Article no.: CGN501116

Chain reinforced 134 links D.420 Doppler yellow

25,00 €
In stock
26,00 €
-4% Discount
Doppler
Chain reinforced 134 links D.420 Doppler blue
Article no.: CGN501115

Chain reinforced 134 links D.420 Doppler blue

25,00 €
In stock
31,00 €
-19% Discount
Doppler
Chain reinforced 134 links D.420 Doppler white
Article no.: CGN501118

Chain reinforced 134 links D.420 Doppler white

25,00 €
In stock
30,50 €
-18% Discount
Doppler
Chain Tensioner Doppler Alu red Rieju MRT
Article no.: CGN500944

Chain Tensioner Doppler Alu red Rieju MRT

21,00 €
In stock
Top Performances
Washers and Circlips gearbox AM6 Top Performances
Article no.: MF60.18860

Washers and Circlips gearbox AM6 Top Performances

20,00 €
In stock
RRP
31,00 €
-35% Discount
Sale
Standard Parts
Rear Sprocket steel 53 teeth - 420 CPI SX / SM
Article no.: MF89.00372

Rear Sprocket steel 53 teeth - 420 CPI SX / SM

14,00 €
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

29,00 €
In stock
30,00 €
-3% Discount
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

41,50 €
In stock
RRP
111,00 €
-63% Discount
Standard Parts
Chain Kit 13x53 - 420 Derbi DRD Pro / Racing
Article no.: MF89.00222

Chain Kit 13x53 - 420 Derbi DRD Pro / Racing

40,50 €
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

40,50 €
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

44,00 €
In stock
Standard Parts
Rear Sprocket reinforced 53 teeth - 420 Rieju MRT
Article no.: MF89.00424

Rear Sprocket reinforced 53 teeth - 420 Rieju MRT

43,00 €
In stock
43,50 €
-1% Discount
Standard Parts
Rear Sprocket reinforced 52 teeth - 420 Rieju MRT
Article no.: MF89.00423

Rear Sprocket reinforced 52 teeth - 420 Rieju MRT

42,00 €
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 steel 71 teeth - 420 Rieju MRT
Article no.: MF89.00329

Rear Sprocket steel 71 teeth - 420 Rieju MRT

28,00 €
In stock
30,00 €
-7% Discount
Standard Parts
Rear Sprocket steel 62 teeth - 420 Rieju MRT
Article no.: MF89.00328

Rear Sprocket steel 62 teeth - 420 Rieju MRT

30,00 €
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 9,80 €
In stock
Standard Parts
Front Sprocket 420 blue Derbi
Article no.: STR-71BLUEDERBI

Front Sprocket 420 blue Derbi

from 5,20 €
In stock
10,00 €
-48% Discount
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 blue Rieju MRT
Article no.: STR-701.53/BL

Rear Sprocket 53 teeth - 420 blue Rieju MRT

29,00 €
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

21,50 €
In stock
25,00 €
-14% Discount
Standard Parts
Rear Sprocket steel 50 teeth - 420 Aprilia SX 50
Article no.: MF89.00342

Rear Sprocket steel 50 teeth - 420 Aprilia SX 50

32,50 €
In stock
35,50 €
-8% Discount
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

21,00 €
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 46 teeth - 420 IGM Rieju MRT
Article no.: IGM5679

Rear Sprocket steel 46 teeth - 420 IGM Rieju MRT

15,00 €
In stock
18,00 €
-17% Discount
Sale
IGM
Rear Sprocket steel 65 teeth - 420 IGM Rieju MRT
Article no.: IGM13101205

Rear Sprocket steel 65 teeth - 420 IGM Rieju MRT

18,00 €
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
Standard Parts
Chain Tensioner complete Motor Hispania Furia Cross
Article no.: SP-0016057

Chain Tensioner complete Motor Hispania Furia Cross

15,00 €
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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