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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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Moose Racing
Rear Sprocket aluminium / steel 520 Moose Racing Beta / Honda 50 teeth black
Article no.: MR12101466

Rear Sprocket aluminium / steel 520 Moose Racing Beta / Honda 50 teeth black

61,00 €
In stock
Moose Racing
Rear Sprocket aluminium 520 Moose Racing Beta RR 50 teeth red
Article no.: MR12111867

Rear Sprocket aluminium 520 Moose Racing Beta RR 50 teeth red

27,00 €
In stock
RRP
46,00 €
-41% Discount
Sale
Moose Racing
Rear Sprocket aluminium 520 Moose Racing Yamaha 49 teeth after 1999
Article no.: MR12111587

Rear Sprocket aluminium 520 Moose Racing Yamaha 49 teeth after 1999

14,50 €
In stock
RRP
39,50 €
-63% Discount
Moose Racing
Rear Sprocket aluminium 520 Moose Racing Beta / Honda 49 teeth
Article no.: MR12111514

Rear Sprocket aluminium 520 Moose Racing Beta / Honda 49 teeth

14,50 €
In stock
RRP
39,50 €
-63% Discount
Moose Racing
Rear Sprocket aluminium 520 Moose Racing KTM / Husqvarna 48 teeth black
Article no.: MR12111454

Rear Sprocket aluminium 520 Moose Racing KTM / Husqvarna 48 teeth black

34,00 €
In stock
RRP
46,00 €
-26% Discount
Sale
Moose Racing
Rear Sprocket aluminium 520 Moose Racing KTM / Husqvarna 45 teeth black
Article no.: MR12111451

Rear Sprocket aluminium 520 Moose Racing KTM / Husqvarna 45 teeth black

14,50 €
In stock
RRP
39,50 €
-63% Discount
Moose Racing
Rear Sprocket aluminium 520 Moose Racing Beta / Husqvarna 42 teeth black
Article no.: MR12111434

Rear Sprocket aluminium 520 Moose Racing Beta / Husqvarna 42 teeth black

14,50 €
In stock
RRP
39,50 €
-63% Discount
Moose Racing
Rear Sprocket aluminium 428 Moose Racing RM / YZ 85 50 teeth blue
Article no.: MR12111614

Rear Sprocket aluminium 428 Moose Racing RM / YZ 85 50 teeth blue

34,00 €
In stock
RRP
42,00 €
-19% Discount
Sale
Moose Racing
Rear Sprocket aluminium 520 Moose Racing KTM / Husqvarna 50 teeth orange
Article no.: MR12111662

Rear Sprocket aluminium 520 Moose Racing KTM / Husqvarna 50 teeth orange

34,00 €
In stock
RRP
46,00 €
-26% Discount
Sale
Moose Racing
Rear Sprocket aluminium 420 Moose Racing TC / SX 65 46 teeth orange
Article no.: MR12111655

Rear Sprocket aluminium 420 Moose Racing TC / SX 65 46 teeth orange

14,50 €
In stock
RRP
39,50 €
-63% Discount
KMC
Chain reinforced KMC 120 links / 415 blue
Article no.: CGN505608

Chain reinforced KMC 120 links / 415 blue

13,00 €
In stock
16,50 €
-21% Discount
Sale
KMC
Chain reinforced KMC 120 links / 415 red
Article no.: CGN505607

Chain reinforced KMC 120 links / 415 red

19,00 €
In stock
KMC
Chain reinforced KMC 103 links / 415 red
Article no.: CGN505604

Chain reinforced KMC 103 links / 415 red

13,00 €
In stock
14,00 €
-7% Discount
Doppler
Chain Guide Doppler Rieju MRT red
Article no.: CGN505689

Chain Guide Doppler Rieju MRT red

30,00 €
In stock
34,50 €
-13% Discount
Doppler
Chain Guide Doppler Derbi / Aprilia / Gilera red
Article no.: CGN505686

Chain Guide Doppler Derbi / Aprilia / Gilera red

30,00 €
In stock
34,00 €
-12% Discount
Doppler
Chain Guide Doppler Derbi / Aprilia / Gilera gold
Article no.: CGN505687

Chain Guide Doppler Derbi / Aprilia / Gilera gold

30,00 €
In stock
31,00 €
-3% Discount
Doppler
Chain Guide Doppler blue Derbi / Aprilia / Gilera
Article no.: CGN505688

Chain Guide Doppler blue Derbi / Aprilia / Gilera

30,00 €
In stock
31,00 €
-3% Discount
Doppler
Chain reinforced 140 d.420 links Doppler gold
Article no.: CGN503602

Chain reinforced 140 d.420 links Doppler gold

21,00 €
In stock
25,00 €
-16% Discount
Doppler
Chain Master Link reinforced 420 Doppler gold
Article no.: CGN504541

Chain Master Link reinforced 420 Doppler gold

2,00 €
In stock
3,60 €
-44% Discount
Standard Parts
Rear Sprocket 52 teeth - 420 Peugeot XP6
Article no.: CGN450044

Rear Sprocket 52 teeth - 420 Peugeot XP6

27,00 €
In stock
Top Performances
Gearwheel 4th gear secondary shaft Top Performances T27 AM6 V1
Article no.: TAM00034

Gearwheel 4th gear secondary shaft Top Performances T27 AM6 V1

26,00 €
In stock
RRP
42,00 €
-38% Discount
Sale
Top Performances
Gearwheel 3rd gear secondary shaft Top Performances T29 AM6 V2
Article no.: TAM00012

Gearwheel 3rd gear secondary shaft Top Performances T29 AM6 V2

28,50 €
In stock
RRP
43,00 €
-34% Discount
Top Performances
Gearwheel 2nd gear secondary shaft T30 Euro 3 (D50B0)
Article no.: TAM00011

Gearwheel 2nd gear secondary shaft T30 Euro 3 (D50B0)

28,00 €
In stock
RRP
45,00 €
-38% Discount
Sale
Top Performances
Gearwheel 5th gear primary shaft Top Performances T24 AM6 V2
Article no.: TAM00008

Gearwheel 5th gear primary shaft Top Performances T24 AM6 V2

12,50 €
In stock
RRP
33,00 €
-62% Discount
Top Performances
Gearwheel 3rd-4th gear primary shaft Top Performances Minarelli T19-22 AM6 V2
Article no.: TAM00007

Gearwheel 3rd-4th gear primary shaft Top Performances Minarelli T19-22 AM6 V2

52,00 €
In stock
RRP
83,00 €
-37% Discount
Sale
Top Performances
Gearwheel 2nd gear primary shaft Top Performances T16 AM6 V2
Article no.: TAM00006

Gearwheel 2nd gear primary shaft Top Performances T16 AM6 V2

20,00 €
In stock
RRP
32,00 €
-38% Discount
Sale
Top Performances
Gearbox complete Top Performances Minarelli AM6
Article no.: T9935000

Gearbox complete Top Performances Minarelli AM6

584,00 €
In stock
RRP
858,00 €
-32% Discount
Standard Parts
Shift Drum Generic / Minarelli AM6
Article no.: EKP-32173

Shift Drum Generic / Minarelli AM6

67,50 €
In stock
69,00 €
-2% Discount
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

0,60 €
In stock
RRP
1,20 €
-50% Discount
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 round 15mm Pit Bike / Dirt Bike
Article no.: MB_TENSIOROUND15/COLOR

Chain Tensioner round 15mm Pit Bike / Dirt Bike

3,40 €
In stock
6,80 €
-50% Discount
Standard Parts
Chain Tensioner round 12mm Pit Bike / Dirt Bike
Article no.: MB_TENSIOROUND12/COLOR

Chain Tensioner round 12mm Pit Bike / Dirt Bike

from 1,50 €
In stock
8,30 €
-82% Discount
Standard Parts
Chain Tensioner square 15mm Pit Bike / Dirt Bike
Article no.: MB_TENSIO15/COLOR

Chain Tensioner square 15mm Pit Bike / Dirt Bike

3,30 €
In stock
6,60 €
-50% Discount
Standard Parts
Chain Tensioner square 12mm Pit Bike / Dirt Bike
Article no.: MB_TENSIO12/COLOR

Chain Tensioner square 12mm Pit Bike / Dirt Bike

3,60 €
In stock
7,30 €
-51% Discount
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
Chain Roller pin 8mm Apollo black
Article no.: MB7510

Chain Roller pin 8mm Apollo black

3,80 €
In stock
Standard Parts
Front Sprocket Retainer d.20mm Pit Bike
Article no.: MB3342

Front Sprocket Retainer d.20mm Pit Bike

2,70 €
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 5,20 €
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 5,30 €
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

4,50 €
In stock
Standard Parts
Gear Selector Fork 150cc / 160cc YX (KLX)
Article no.: MB3023

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

19,50 €
In stock
RRP
51,00 €
-62% Discount
Standard Parts
Gear Selector Fork 125cc / 140cc / 149cc YX (CRF)
Article no.: MB3117

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

54,00 €
In stock
Standard Parts
Gear Shift Lock Lever Pit Bike / Dirt Bike
Article no.: MB7632

Gear Shift Lock Lever Pit Bike / Dirt Bike

2,00 €
In stock
RRP
5,10 €
-61% Discount
Standard Parts
Rear Sprocket 420 Pit Bike / Dirt Bike
Article no.: MB_REARSPRO420_PIT/SIZE

Rear Sprocket 420 Pit Bike / Dirt Bike

from 12,50 €
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

58,00 €
In stock
61,50 €
-6% Discount
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

21,00 €
In stock
RRP
56,00 €
-63% Discount
Standard Parts
Primary Transmission Pit Bike 125cc 138cc 140cc 150cc Lifan
Article no.: MB3433

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

19,50 €
In stock
RRP
52,00 €
-63% 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

28,00 €
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

27,00 €
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

23,50 €
In stock
Top Performances
Gear Wheel 6th gear Top Performances (2nd series) AM6
Article no.: T9931910

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

48,00 €
In stock
58,00 €
-17% Discount
Sale
Top Performances
Gearbox Top Performances 2nd series Minarelli AM6
Article no.: TAM00031

Gearbox Top Performances 2nd series Minarelli AM6

201,00 €
In stock
RRP
319,00 €
-37% Discount
Sale
Standard Parts
Pedal Drive Shaft Piaggio Ciao
Article no.: R121530300

Pedal Drive Shaft Piaggio Ciao

23,00 €
In stock
Standard Parts
Front Sprocket 428 Derbi / Gilera / Aprilia
Article no.: MF89.0001_PIGNON_DERBI_428

Front Sprocket 428 Derbi / Gilera / Aprilia

from 7,20 €
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
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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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