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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
Front Sprocket 16 teeth Puch Maxi
Article no.: MOF-28892

Front Sprocket 16 teeth Puch Maxi

4,10 €
In stock
Standard Parts
Front Sprocket 13 teeth Puch Maxi
Article no.: MOF-28890

Front Sprocket 13 teeth Puch Maxi

3,80 €
In stock
Standard Parts
Front Sprocket 12 teeth Puch Maxi
Article no.: MOF-28888

Front Sprocket 12 teeth Puch Maxi

3,50 €
In stock
Standard Parts
Front Sprocket 11 teeth Puch Maxi
Article no.: MOF-28887

Front Sprocket 11 teeth Puch Maxi

3,50 €
In stock
Standard Parts
Front Sprocket 10 teeth Puch Maxi
Article no.: MOF-28886

Front Sprocket 10 teeth Puch Maxi

3,30 €
In stock
Standard Parts
Rear Sprocket 45 teeth Puch Maxi silver
Article no.: MOF-34241

Rear Sprocket 45 teeth Puch Maxi silver

10,50 €
In stock
Doppler
Chain Kit aluminium blue 13x53 - 428 Doppler Sherco 50cc
Article no.: CGN509947

Chain Kit aluminium blue 13x53 - 428 Doppler Sherco 50cc

85,00 €
In stock
Sale
Doppler
Chain Kit aluminium Neochrome 13x53 - 420 Rieju MRT / Yamaha DT
Article no.: CGN509945

Chain Kit aluminium Neochrome 13x53 - 420 Rieju MRT / Yamaha DT

84,00 €
In stock
88,00 €
-5% Discount
Sale
Doppler
Chain Kit aluminium blue 13x53 - 420 Rieju MRT
Article no.: CGN509944

Chain Kit aluminium blue 13x53 - 420 Rieju MRT

99,00 €
In stock
Doppler
Chain Kit aluminium Neochrome 14x53 - 420 Doppler Derbi GPR / Aprilia RS4
Article no.: CGN509943

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

84,00 €
In stock
Sale
Doppler
Chain Kit aluminium Neochrome 14x53 - 420 Doppler Derbi Senda X-treme
Article no.: CGN509942

Chain Kit aluminium Neochrome 14x53 - 420 Doppler Derbi Senda X-treme

109,00 €
In stock
Doppler
Chain Kit aluminium Neochrome 13x53 - 428 Doppler Beta RR
Article no.: CGN509940

Chain Kit aluminium Neochrome 13x53 - 428 Doppler Beta RR

109,00 €
In stock
Doppler
Chain Kit aluminium Neochrome 13x53 - 420 Doppler Beta RR
Article no.: CGN509939

Chain Kit aluminium Neochrome 13x53 - 420 Doppler Beta RR

109,00 €
In stock
Doppler
Rear Sprocket 53 teeth - 420 Doppler Alu CNC neochrome Rieju MRT
Article no.: CGN505503

Rear Sprocket 53 teeth - 420 Doppler Alu CNC neochrome Rieju MRT

49,00 €
In stock
51,00 €
-4% Discount
Sale
Doppler
Rear Sprocket 53 teeth - 420 Doppler Alu CNC neochrome Derbi DRD Pro
Article no.: CGN505502

Rear Sprocket 53 teeth - 420 Doppler Alu CNC neochrome Derbi DRD Pro

37,00 €
In stock
RRP
69,50 €
-47% Discount
Doppler
Rear Sprocket 53 teeth - 420 Doppler Alu CNC Neochrome Beta RR
Article no.: CGN505501

Rear Sprocket 53 teeth - 420 Doppler Alu CNC Neochrome Beta RR

49,00 €
In stock
Sale
Doppler
Chain Kit aluminium black 13x53 - 428 Doppler Beta RR
Article no.: CGN504014

Chain Kit aluminium black 13x53 - 428 Doppler Beta RR

85,00 €
In stock
Sale
Doppler
Chain Kit aluminium red 13x53 - 428 Doppler Beta RR
Article no.: CGN504013

Chain Kit aluminium red 13x53 - 428 Doppler Beta RR

85,00 €
In stock
Sale
Doppler
Chain Kit aluminium black 13x53 - 420 Doppler Beta RR
Article no.: CGN504012

Chain Kit aluminium black 13x53 - 420 Doppler Beta RR

80,00 €
In stock
Sale
Doppler
Chain Kit aluminium black 13x53 - 420 Doppler Rieju MRT / Yamaha DT
Article no.: CGN503783

Chain Kit aluminium black 13x53 - 420 Doppler Rieju MRT / Yamaha DT

99,00 €
In stock
Doppler
Chain Kit aluminium red 14x53 - 420 Doppler Derbi Senda DRD
Article no.: CGN503777

Chain Kit aluminium red 14x53 - 420 Doppler Derbi Senda DRD

60,00 €
In stock
RRP
99,00 €
-39% Discount
MotoForce
Gearbox AM6
Article no.: MF60.18861

Gearbox AM6

91,00 €
In stock soon
Stage6
Chain Master Link 420 Stage6 white
Article no.: S6-2020003

Chain Master Link 420 Stage6 white

2,90 €
In stock soon
Stage6
Chain Master Link 420 Stage6 red
Article no.: S6-2020001

Chain Master Link 420 Stage6 red

2,90 €
In stock soon
Stage6
Chain Master Link 420 Stage6 blue
Article no.: S6-2020000

Chain Master Link 420 Stage6 blue

2,90 €
In stock soon
Stage6
Front Sprocket Locking Plate Stage6 purple
Article no.: S6-2029301/PU

Front Sprocket Locking Plate Stage6 purple

9,00 €
In stock soon
Stage6
Locking Plate front sprocket Derbi Stage6 yellow
Article no.: S6-2029301/YE

Locking Plate front sprocket Derbi Stage6 yellow

9,00 €
In stock soon
Stage6
Locking Plate front sprocket Derbi Stage6 red
Article no.: S6-2029301/RE

Locking Plate front sprocket Derbi Stage6 red

9,00 €
In stock soon
Stage6
Locking Plate front sprocket Derbi Stage6 black
Article no.: S6-2029301/BK

Locking Plate front sprocket Derbi Stage6 black

9,00 €
In stock soon
KMC
Chain reinforced KMC 120 links / 415 blue
Article no.: CGN505608

Chain reinforced KMC 120 links / 415 blue

16,50 €
In stock soon
KMC
Chain reinforced KMC 120 links / 415 red
Article no.: CGN505607

Chain reinforced KMC 120 links / 415 red

16,50 €
In stock soon
KMC
Chain reinforced KMC 103 links / 415 red
Article no.: CGN505604

Chain reinforced KMC 103 links / 415 red

14,00 €
In stock soon
Doppler
Chain Guide Doppler Rieju MRT red
Article no.: CGN505689

Chain Guide Doppler Rieju MRT red

34,00 €
In stock soon
Doppler
Chain reinforced 140 d.420 links Doppler gold
Article no.: CGN503602

Chain reinforced 140 d.420 links Doppler gold

28,50 €
In stock soon
Top Performances
Secondary Gear Shaft Top Performances Minarelli AM6 V2
Article no.: TAM00037

Secondary Gear Shaft Top Performances Minarelli AM6 V2

50,50 €
In stock soon
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 soon
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

23,00 €
In stock soon
Standard Parts
Chain Roller 10mm - black Pit Bike / Dirt Bike
Article no.: MB7511

Chain Roller 10mm - black Pit Bike / Dirt Bike

5,60 €
In stock soon
Top Performances
Gearbox Top Performances 2nd series Minarelli AM6
Article no.: TAM00031

Gearbox Top Performances 2nd series Minarelli AM6

234,00 €
In stock soon
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 soon
Doppler
Chain Master Link Doppler 420 red
Article no.: CGN504530

Chain Master Link Doppler 420 red

3,20 €
In stock soon
Doppler
Chain reinforced 138 links D.428 red
Article no.: CGN503981

Chain reinforced 138 links D.428 red

31,00 €
In stock soon
Standard Parts
Chain reinforced 130 links D.420 black
Article no.: MF89.00140

Chain reinforced 130 links D.420 black

12,50 €
In stock soon
Rieju
Swingarm Slider Rieju 50cc / 125cc
Article no.: OE-RIE7100302

Swingarm Slider Rieju 50cc / 125cc

11,00 €
In stock soon
Doppler
Chain Tensioner Doppler Alu red Beta
Article no.: CGN500942

Chain Tensioner Doppler Alu red Beta

25,50 €
In stock soon
Doppler
Chain Tensioner Doppler Alu black Beta
Article no.: CGN500943

Chain Tensioner Doppler Alu black Beta

25,50 €
In stock soon
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 soon
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 soon
Standard Parts
Chain Pulley Set Aprilia / CPI / Derbi / Gilera
Article no.: 34935

Chain Pulley Set Aprilia / CPI / Derbi / Gilera

9,00 €
In stock soon
GY6
Gear input shaft (clutch) - GY6 50cc 139QMB
Article no.: OE-GY6BT13868

Gear input shaft (clutch) - GY6 50cc 139QMB

12,50 €
In stock soon
CPI
Driveshaft / Wheel Axle - China 2-stroke, CPI, Keeway
Article no.: OE-CPI20914

Driveshaft / Wheel Axle - China 2-stroke, CPI, Keeway

24,00 €
In stock soon
Standard Parts
Rear Sprocket 56 teeth Peugeot 103 SPX / RCX (Grimeca rims d.98mm)
Article no.: CGN2954

Rear Sprocket 56 teeth Peugeot 103 SPX / RCX (Grimeca rims d.98mm)

19,50 €
In stock soon
Standard Parts
Chain Master Link Iris Racing super reinforced d=415
Article no.: CGN8872
1

Chain Master Link Iris Racing super reinforced d=415

4,50 €
In stock soon
Standard Parts
Gear 11 teeth Peugeot 103 SPX / RCX
Article no.: CGN861

Gear 11 teeth Peugeot 103 SPX / RCX

6,70 €
In stock soon
Standard Parts
Gear 13 teeth Peugeot 103 SP / MVL / Vogue
Article no.: CGN858

Gear 13 teeth Peugeot 103 SP / MVL / Vogue

8,10 €
In stock soon
Standard Parts
Pedal Shaft Peugeot 103 SP / MV / Vogue
Article no.: CGN702
1

Pedal Shaft Peugeot 103 SP / MV / Vogue

12,50 €
In stock soon
Standard Parts
Pinion 13 teeth MBK 51
Article no.: CGN4261

Pinion 13 teeth MBK 51

10,00 €
In stock soon
AFAM
Chain Kit AFAM reinforced 14x53 (size=420) Derbi Senda DRD after 2002
Article no.: CGN467432
3

Chain Kit AFAM reinforced 14x53 (size=420) Derbi Senda DRD after 2002

64,50 €
In stock soon
Iris
Chain Iris standard 106 links size 415
Article no.: CGN3037
3

Chain Iris standard 106 links size 415

8,80 €
In stock soon
Top Performances
Gearbox Washers and Circlips AM6 (1st series)
Article no.: T9935030

Gearbox Washers and Circlips AM6 (1st series)

15,50 €
In stock soon
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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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