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Transmission

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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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Standard Parts
Shift Drum Generic / Minarelli AM6
Article no.: EKP-32173

Shift Drum Generic / Minarelli AM6

69,00 €
In stock
Jasil
Gearbox complete Top Racing Derbi Euro 3
Article no.: JA6250005
1

Gearbox complete Top Racing Derbi Euro 3

499,00 €
In stock
Jasil
Gearbox complete Top Racing AM6
Article no.: JA6250004

Gearbox complete Top Racing AM6

419,00 €
In stock
Derbi
Primary Gears Derbi Euro 3 GPR
Article no.: OE-DE8470395

Primary Gears Derbi Euro 3 GPR

319,00 €
In stock
Standard Parts
Spring f. gear shift lock lever Pit Bike engine Lifan 125cc / 140cc
Article no.: MB24323/152FMH

Spring f. gear shift lock lever Pit Bike engine Lifan 125cc / 140cc

1,20 €
In stock
Standard Parts
Chain Tensioner steel - d.12mm Pit Bike / Dirt Bike
Article no.: MB2349

Chain Tensioner steel - d.12mm Pit Bike / Dirt Bike

5,30 €
In stock
Standard Parts
Chain Tensioner aluminium d.15mm Pit Bike / Dirt Bike
Article no.: MB_TENSIO15/COLOR

Chain Tensioner aluminium d.15mm Pit Bike / Dirt Bike

from 8,00 €
In stock
Standard Parts
Chain Roller Pit Bike / Dirt Bike (just roller)
Article no.: MB7568

Chain Roller Pit Bike / Dirt Bike (just roller)

7,00 €
In stock
Standard Parts
Cam Chain Tensioner d.10mm white
Article no.: MB2350

Cam Chain Tensioner d.10mm white

5,80 €
In stock
Standard Parts
Front Sprocket Retainer d.20mm Pit Bike
Article no.: MB3342

Front Sprocket Retainer d.20mm Pit Bike

2,60 €
In stock
Standard Parts
Front Sprocket 428 - d.20mm Pit Bike / Dirt Bike
Article no.: MB_SPRO42820PIT/SIZE

Front Sprocket 428 - d.20mm Pit Bike / Dirt Bike

from 4,70 €
In stock
Standard Parts
Front Sprocket 428 - d.17mm Pit Bike / Dirt Bike
Article no.: MB_SPRO42817PIT/SIZE

Front Sprocket 428 - d.17mm Pit Bike / Dirt Bike

from 5,20 €
In stock
Standard Parts
Front Sprocket 420 - d.20mm Pit Bike / Dirt Bike
Article no.: MB_SPRO42020PIT/SIZE

Front Sprocket 420 - d.20mm Pit Bike / Dirt Bike

from 5,20 €
In stock
Standard Parts
Front Sprocket 420 - d.17mm Pit Bike / Dirt Bike
Article no.: MB_SPRO42017PIT/SIZE

Front Sprocket 420 - d.17mm Pit Bike / Dirt Bike

from 5,20 €
In stock
Standard Parts
Slide Piece swingarm nylon Pit Bike / Dirt Bike
Article no.: MB2478

Slide Piece swingarm nylon Pit Bike / Dirt Bike

4,20 €
In stock
Standard Parts
Swingarm Slider short Pit Bike / Dirt Bike
Article no.: MB2351

Swingarm Slider short Pit Bike / Dirt Bike

6,40 €
In stock
Volt Racing
Chain Guide Volt Racing Apollo RFZ / RXF 2018
Article no.: MB7558

Chain Guide Volt Racing Apollo RFZ / RXF 2018

21,50 €
In stock
RRP
42,50 €
-49% Discount
Standard Parts
Gear Selector Fork 150cc / 160cc YX (KLX)
Article no.: MB3023

Gear Selector Fork 150cc / 160cc YX (KLX)

51,00 €
In stock
Standard Parts
Gear Selector Fork 125cc / 140cc / 149cc YX (CRF)
Article no.: MB3117

Gear Selector Fork 125cc / 140cc / 149cc YX (CRF)

51,00 €
In stock
Standard Parts
Gear Shift Lock Lever Pit Bike / Dirt Bike
Article no.: MB7632

Gear Shift Lock Lever Pit Bike / Dirt Bike

5,10 €
In stock
Standard Parts
Rear Sprocket 420 Pit Bike / Dirt Bike
Article no.: MB_REARSPRO420_PIT/SIZE

Rear Sprocket 420 Pit Bike / Dirt Bike

13,00 €
In stock
Standard Parts
Secondary Gears start in neutral Pit Bike 125cc Lifan - d.20mm
Article no.: MB3432

Secondary Gears start in neutral Pit Bike 125cc Lifan - d.20mm

61,50 €
In stock
Standard Parts
Secondary Transmission start in neutral Pit Bike 125cc YX - d.17mm
Article no.: MB3954

Secondary Transmission start in neutral Pit Bike 125cc YX - d.17mm

28,00 €
In stock
RRP
56,00 €
-50% Discount
Standard Parts
Secondary Transmission Pit Bike 125cc- 140cc-149cc-150cc -160cc- d.17mm
Article no.: MB3064

Secondary Transmission Pit Bike 125cc- 140cc-149cc-150cc -160cc- d.17mm

63,00 €
In stock
Standard Parts
Primary Transmission Pit Bike 125cc 138cc 140cc 150cc Lifan
Article no.: MB3433

Primary Transmission Pit Bike 125cc 138cc 140cc 150cc Lifan

26,00 €
In stock
RRP
52,00 €
-50% Discount
Standard Parts
Rear Sprocket 60 teeth - 420 d. 100mm red Beta RR
Article no.: SP-40592/RE

Rear Sprocket 60 teeth - 420 d. 100mm red Beta RR

25,50 €
In stock
Standard Parts
Rear Sprocket 51 teeth - 420 d. 100mm red Beta RR
Article no.: SP-37396/RE

Rear Sprocket 51 teeth - 420 d. 100mm red Beta RR

25,50 €
In stock
Standard Parts
Rear Sprocket 50 teeth - 420 d. 100mm red Beta RR
Article no.: SP-40580/RE

Rear Sprocket 50 teeth - 420 d. 100mm red Beta RR

22,50 €
In stock
Top Performances
Gear Wheel 6th gear Top Performances (2nd series) Minarelli AM6
Article no.: T9931910

Gear Wheel 6th gear Top Performances (2nd series) Minarelli AM6

53,00 €
In stock
Sale
Standard Parts
Pedal Drive Shaft Piaggio Ciao
Article no.: R121530300

Pedal Drive Shaft Piaggio Ciao

26,00 €
In stock
Standard Parts
Front Sprocket 428 Derbi / Gilera / Aprilia
Article no.: MF89.0001_PIGNON_DERBI_428

Front Sprocket 428 Derbi / Gilera / Aprilia

from 8,30 €
In stock
Standard Parts
Chain reinforced 120 links D.415 Doppler gold
Article no.: CGN504287

Chain reinforced 120 links D.415 Doppler gold

13,00 €
In stock
Standard Parts
Chain reinforced 106 links D.415 Doppler gold
Article no.: CGN504286

Chain reinforced 106 links D.415 Doppler gold

12,00 €
In stock
AFAM
Chain Master Link Afam 428 gold
Article no.: AFAM485376

Chain Master Link Afam 428 gold

2,20 €
In stock
AFAM
Chain Master Link Afam 420 gold
Article no.: AFAM483128

Chain Master Link Afam 420 gold

2,50 €
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

16,00 €
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

25,50 €
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

101,00 €
In stock
Doppler
Chain Master Link Doppler 428
Article no.: CGN5045_CHAINLINK428COLOR
2

Chain Master Link Doppler 428

3,20 €
In stock
Doppler
Chain Master Link Doppler 420 yellow
Article no.: CGN504532

Chain Master Link Doppler 420 yellow

3,20 €
In stock
Doppler
Chain Master Link Doppler 420 blue
Article no.: CGN504531

Chain Master Link Doppler 420 blue

3,20 €
In stock
Doppler
Chain Master Link Doppler 420 black
Article no.: CGN504529

Chain Master Link Doppler 420 black

3,20 €
In stock
Doppler
Chain reinforced 138 links D.428 orange
Article no.: CGN503983

Chain reinforced 138 links D.428 orange

31,00 €
In stock
Doppler
Chain reinforced 138 links D.428 blue
Article no.: CGN503982

Chain reinforced 138 links D.428 blue

31,00 €
In stock
Doppler
Chain reinforced 138 links D.428 red
Article no.: CGN503981

Chain reinforced 138 links D.428 red

31,00 €
In stock
Doppler
Chain reinforced 138 links D.428 gold
Article no.: CGN503614

Chain reinforced 138 links D.428 gold

31,00 €
In stock
Standard Parts
Chain Guide Derbi / Aprilia / Gilera red
Article no.: MF89.00192
1

Chain Guide Derbi / Aprilia / Gilera red

24,00 €
In stock
Standard Parts
Chain Guide Derbi / Aprilia / Gilera blue
Article no.: MF89.00191

Chain Guide Derbi / Aprilia / Gilera blue

24,50 €
In stock
Standard Parts
Rear Sprocket 48 teeth - 420 Rieju MRT
Article no.: EKP-149076

Rear Sprocket 48 teeth - 420 Rieju MRT

26,00 €
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
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

61,00 €
In stock
Sale
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC black Aprilia SX 50
Article no.: CGN500922

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

51,00 €
In stock
Sale
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

51,00 €
In stock
Sale
Rieju
Swingarm Slider Rieju MRT / MRX
Article no.: OE-RIE3605001

Swingarm Slider Rieju MRT / MRX

16,00 €
In stock
Sale
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

92,00 €
In stock
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

42,00 €
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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