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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 Engine cover Front sprocket Gearbox Gearbox accessories Gearbox bearing kit Gearshift lever Ignition lock Kickstarter accessories 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
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AFAM Algi Aprilia Avoc Beta Bidalot 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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MotoForce
Chain reinforced 120 links / 415
Article no.: MF89.00133

Chain reinforced 120 links / 415

16,00 €
In stock
RRP
18,00 €
-11% Discount
Sale
MotoForce
Chain Tensioner Yamaha TZR / MBK X-Power
Article no.: MF99.20183

Chain Tensioner Yamaha TZR / MBK X-Power

8,20 €
In stock
MotoForce
Chain Kit 12x52 - 420 Rieju MRT
Article no.: MF89.00241

Chain Kit 12x52 - 420 Rieju MRT

52,00 €
In stock
MotoForce
Spring for gear selector shaft Derbi
Article no.: MF60.19322

Spring for gear selector shaft Derbi

3,20 €
In stock
MotoForce
Chain Guide Derbi / Aprilia / Gilera
Article no.: MF89.00190

Chain Guide Derbi / Aprilia / Gilera

19,00 €
In stock
RRP
21,50 €
-12% Discount
Sale
MotoForce
Chain reinforced 130 links - 415
Article no.: MF89.00135
1

Chain reinforced 130 links - 415

10,00 €
In stock
RRP
13,50 €
-26% Discount
Sale
MotoForce
Rear Sprocket steel 52 teeth - 420 Rieju MRT
Article no.: MF89.00323

Rear Sprocket steel 52 teeth - 420 Rieju MRT

18,50 €
In stock
MotoForce
Swingarm Slider Derbi Senda R
Article no.: L-SP90554
1

Swingarm Slider Derbi Senda R

11,00 €
In stock
MotoForce
Chain Tensioner diameter 12mm Derbi Senda
Article no.: MF99.20177
1

Chain Tensioner diameter 12mm Derbi Senda

3,90 €
In stock
MotoForce
Chain Tensioner diameter 15mm Derbi Senda
Article no.: MF99.20178
2

Chain Tensioner diameter 15mm Derbi Senda

4,00 €
In stock
MotoForce
Front Sprocket Motoforce Minarelli AM6 428
Article no.: MF890005_MF_BPIGNON_AM6_428
35

Front Sprocket Motoforce Minarelli AM6 428

from 6,10 €
In stock
MotoForce
Front Sprocket Motoforce Minarelli AM6 420
Article no.: MF8900000_MF_BPIGNON_AM6_420
68

Front Sprocket Motoforce Minarelli AM6 420

from 5,50 €
In stock
8,00 €
-31% Discount
MotoForce
Small End Bearing for racing transmission Piaggio
Article no.: MF33.00023
5

Small End Bearing for racing transmission Piaggio

8,00 €
In stock
MotoForce
Gearbox AM6
Article no.: MF60.18861

Gearbox AM6

91,00 €
In stock
MotoForce
Reinforced Chain 132 links size=420
Article no.: MF89.00153
18

Reinforced Chain 132 links size=420

16,00 €
In stock
RRP
20,50 €
-22% Discount
Sale
MotoForce
Reinforced Chain 138 links - 420
Article no.: MF89.00151
19

Reinforced Chain 138 links - 420

23,00 €
In stock
MotoForce
Chain Kit 13x53 - 428 Derbi Senda X-treme
Article no.: MF89.00203
11

Chain Kit 13x53 - 428 Derbi Senda X-treme

73,50 €
In stock
MotoForce
Rear Sprocket 48 teeth - 428 Yamaha TZR
Article no.: MF89.00353

Rear Sprocket 48 teeth - 428 Yamaha TZR

22,50 €
In stock
MotoForce
Chain Master Link size=420
Article no.: MF89.00401
32

Chain Master Link size=420

3,00 €
In stock
MotoForce
Chain Kit 13x53 - 420 Derbi Senda X-treme
Article no.: MF89.00201
20

Chain Kit 13x53 - 420 Derbi Senda X-treme

57,00 €
In stock
RRP
63,00 €
-10% Discount
Sale
MotoForce
Chain Kit 14x53 - 420 Derbi Senda X-treme
Article no.: MF89.00200
27

Chain Kit 14x53 - 420 Derbi Senda X-treme

62,00 €
In stock
RRP
63,00 €
-2% Discount
Sale
MotoForce
Reinforced Chain 134 links size=420
Article no.: MF89.00150
4

Reinforced Chain 134 links size=420

34,00 €
In stock
MotoForce
Reinforced Chain 138 links size=428
Article no.: MF89.00101
21

Reinforced Chain 138 links size=428

20,00 €
In stock
RRP
22,00 €
-9% Discount
Sale
MotoForce
Front Sprocket Motoforce Derbi Euro 3
Article no.: MF890000_MF_PIGNONBOITE_DERBI2006
74

Front Sprocket Motoforce Derbi Euro 3

from 5,60 €
In stock
8,40 €
-33% Discount
Stage6
Chain Master Link 420 Stage6 green
Article no.: S6-2022002

Chain Master Link 420 Stage6 green

2,90 €
In stock
Stage6
Chain Master Link 420 Stage6 orange
Article no.: S6-2022001

Chain Master Link 420 Stage6 orange

2,90 €
In stock
Stage6
Chain Master Link 420 Stage6 neon pink
Article no.: S6-2021003

Chain Master Link 420 Stage6 neon pink

2,90 €
In stock
Stage6
Chain Master Link 420 Stage6 neon green
Article no.: S6-2021002

Chain Master Link 420 Stage6 neon green

2,90 €
In stock
Stage6
Chain Master Link 420 Stage6 neon orange
Article no.: S6-2021001

Chain Master Link 420 Stage6 neon orange

2,90 €
In stock
Stage6
Chain Master Link 420 Stage6 yellow
Article no.: S6-2020002

Chain Master Link 420 Stage6 yellow

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

Chain Master Link 420 Stage6 red

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

Chain Master Link 420 Stage6 blue

2,90 €
In stock
Stage6
Rear Sprocket 53 teeth - 420 Stage6 aluminium CNC Peugeot / Rieju
Article no.: S6-2018802/COLOR
1

Rear Sprocket 53 teeth - 420 Stage6 aluminium CNC Peugeot / Rieju

from 38,00 €
In stock
RRP
55,00 €
-31% Discount
Stage6
Rear Sprocket 53 teeth - 420 Stage6 aluminium CNC Derbi DRD Pro
Article no.: S6-2019301/COLOR

Rear Sprocket 53 teeth - 420 Stage6 aluminium CNC Derbi DRD Pro

from 40,00 €
In stock
RRP
55,00 €
-27% Discount
Stage6
Rear Sprocket 53 teeth - 420 Stage6 aluminium CNC Beta RR
Article no.: S6-2018801/COLOR

Rear Sprocket 53 teeth - 420 Stage6 aluminium CNC Beta RR

49,50 €
In stock
RRP
55,00 €
-10% Discount
Stage6
Chain HQ Stage6 420 / 140 links Neochrome
Article no.: S6-2010004

Chain HQ Stage6 420 / 140 links Neochrome

29,00 €
In stock
RRP
33,00 €
-12% Discount
Sale
Stage6
Chain HQ Stage6 420 / 140 links green
Article no.: S6-2012002
1

Chain HQ Stage6 420 / 140 links green

32,50 €
In stock
RRP
35,50 €
-8% Discount
Stage6
Chain HQ Stage6 420 / 140 links orange
Article no.: S6-2012001
4

Chain HQ Stage6 420 / 140 links orange

32,50 €
In stock
RRP
35,50 €
-8% Discount
Stage6
Chain HQ Stage6 420 / 140 links pink
Article no.: S6-2011003
8

Chain HQ Stage6 420 / 140 links pink

32,50 €
In stock
RRP
35,50 €
-8% Discount
Stage6
Chain HQ Stage6 420 / 140 links green
Article no.: S6-2011002
6

Chain HQ Stage6 420 / 140 links green

32,50 €
In stock
RRP
35,50 €
-8% Discount
Stage6
Chain HQ Stage6 420 / 140 links orange
Article no.: S6-2011001
7

Chain HQ Stage6 420 / 140 links orange

32,50 €
In stock
RRP
35,50 €
-8% Discount
Stage6
Chain HQ Stage6 420 / 140 links white
Article no.: S6-2010003
2

Chain HQ Stage6 420 / 140 links white

31,00 €
In stock
RRP
35,50 €
-13% Discount
Sale
Stage6
Chain HQ Stage6 420 / 140 links yellow
Article no.: S6-2010002
9

Chain HQ Stage6 420 / 140 links yellow

31,00 €
In stock
RRP
35,50 €
-13% Discount
Sale
Stage6
Chain HQ Stage6 420 / 140 links red
Article no.: S6-2010001
17

Chain HQ Stage6 420 / 140 links red

31,00 €
In stock
RRP
35,50 €
-13% Discount
Sale
Stage6
Chain HQ Stage6 420 / 140 links blue
Article no.: S6-2010000
12

Chain HQ Stage6 420 / 140 links blue

32,50 €
In stock
RRP
35,50 €
-8% Discount
Stage6
Secondary Gears Stage6  15/42 (2,80) China 2-stroke
Article no.: S6-2019502P

Secondary Gears Stage6  15/42 (2,80) China 2-stroke

130,00 €
In stock
RRP
143,00 €
-9% Discount
Stage6
Primary Gears Stage6 15/50 (3,33), China 2-stroke
Article no.: S6-2019501P

Primary Gears Stage6 15/50 (3,33), China 2-stroke

97,50 €
In stock
RRP
102,00 €
-4% Discount
Stage6
Primary Gears Stage6 17/51 GY6 4-stroke
Article no.: S6-2013901P
1

Primary Gears Stage6 17/51 GY6 4-stroke

97,50 €
In stock
RRP
102,00 €
-4% Discount
Stage6
Stage6 Inspection Lid Screw for transmission cover Yamaha BW's / Aerox
Article no.: S6-22166ET06

Stage6 Inspection Lid Screw for transmission cover Yamaha BW's / Aerox

2,00 €
In stock
RRP
5,00 €
-60% Discount
Stage6
Front Sprocket Locking Plate Stage6 purple
Article no.: S6-2029301/PU

Front Sprocket Locking Plate Stage6 purple

9,00 €
In stock
Stage6
Front Sprocket Locking Plate Stage6 turquoise
Article no.: S6-2029301/TU

Front Sprocket Locking Plate Stage6 turquoise

9,00 €
In stock
Stage6
Chain 420 Stage6 HQ purple
Article no.: S6-2010006

Chain 420 Stage6 HQ purple

31,00 €
In stock
RRP
34,00 €
-9% Discount
New
Stage6
Chain 420 Stage6 HQ turquoise
Article no.: S6-2010005

Chain 420 Stage6 HQ turquoise

31,00 €
In stock
RRP
34,00 €
-9% Discount
New
Stage6
Locking Plate front sprocket Derbi Stage6 yellow
Article no.: S6-2029301/YE

Locking Plate front sprocket Derbi Stage6 yellow

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

Locking Plate front sprocket Derbi Stage6 orange

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

Locking Plate front sprocket Derbi Stage6 green

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

Locking Plate front sprocket Derbi Stage6 blue

9,00 €
In stock
Stage6
Chain Kit 13x53 - 420 Stage6 aluminium CNC yellow Peugeot / Rieju
Article no.: S6-2118823/YE

Chain Kit 13x53 - 420 Stage6 aluminium CNC yellow Peugeot / Rieju

72,20 €
In stock
76,00 €
-5% Set-Rabatt
Stage6
Chain Kit 14x53 - 420 Stage6 aluminium CNC yellow Peugeot / Rieju
Article no.: S6-2118824/YE

Chain Kit 14x53 - 420 Stage6 aluminium CNC yellow Peugeot / Rieju

73,15 €
In stock
77,00 €
-5% Set-Rabatt
Stage6
Chain Kit 13x53 - 420 Stage6 aluminium CNC green Peugeot / Rieju
Article no.: S6-2118823/GR

Chain Kit 13x53 - 420 Stage6 aluminium CNC green Peugeot / Rieju

84,55 €
In stock
89,00 €
-5% Set-Rabatt
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51

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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