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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
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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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Top Performances
Gear Selector Fork Set forged Top Performances AM6
Article no.: TAM00046

Gear Selector Fork Set forged Top Performances AM6

77,00 €
In stock soon
Doppler
Chain Guide Doppler Derbi / Aprilia / Gilera purple
Article no.: CGN533906

Chain Guide Doppler Derbi / Aprilia / Gilera purple

34,00 €
In stock soon
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC purple Rieju MRT
Article no.: CGN533905

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

50,50 €
In stock soon
Doppler
Chain Kit steel 13x53 - 428 Doppler Origin Beta RR
Article no.: CGN515037

Chain Kit steel 13x53 - 428 Doppler Origin Beta RR

69,50 €
In stock soon
Doppler
Rear Sprocket steel 53 teeth - 420 Doppler Origin Fantic XM / XE
Article no.: CGN534140

Rear Sprocket steel 53 teeth - 420 Doppler Origin Fantic XM / XE

30,50 €
In stock soon
Doppler
Rear Sprocket steel 53 teeth - 428 Doppler Origin Sherco 50
Article no.: CGN528468

Rear Sprocket steel 53 teeth - 428 Doppler Origin Sherco 50

30,50 €
In stock soon
Standard Parts
Rear Sprocket steel 53 teeth 420 CPI SM
Article no.: MF89.00373

Rear Sprocket steel 53 teeth 420 CPI SM

18,00 €
In stock soon
AFAM
Chain Kit Alu Sherco SM-R Afam 13x56 - 428 (original gear ratio)
Article no.: AFAM205407

Chain Kit Alu Sherco SM-R Afam 13x56 - 428 (original gear ratio)

86,50 €
In stock soon
AFAM
Chain Kit Sherco SM-R Afam 11x60 - 428 (original gear ratio)
Article no.: AFAM205405

Chain Kit Sherco SM-R Afam 11x60 - 428 (original gear ratio)

93,00 €
In stock soon
AFAM
Chain Kit Sherco SE-R 50 Afam 12x56 - 428 (original gear ratio)
Article no.: AFAM150806

Chain Kit Sherco SE-R 50 Afam 12x56 - 428 (original gear ratio)

59,50 €
In stock soon
AFAM
Rear Sprocket steel Generic Trigger Afam 50 teeth - 420
Article no.: AFAM160795

Rear Sprocket steel Generic Trigger Afam 50 teeth - 420

24,50 €
In stock soon
Str8
Clutch Cable Holder Derbi STR8 Black
Article no.: STR-021.03/BK

Clutch Cable Holder Derbi STR8 Black

5,00 €
In stock soon
Rieju
Chain Tensioner Rieju MRT (x2)
Article no.: OE-RIE0000.640.5010

Chain Tensioner Rieju MRT (x2)

18,00 €
In stock soon
Str8
Clutch Cable Holder Derbi STR8 Purple
Article no.: STR-021.03/PU

Clutch Cable Holder Derbi STR8 Purple

4,60 €
In stock soon
Str8
Clutch Cable Holder Derbi STR8 Red
Article no.: STR-021.03/RE

Clutch Cable Holder Derbi STR8 Red

4,50 €
In stock soon
Str8
Clutch Cable Holder Derbi STR8 Blue
Article no.: STR-021.03/BL

Clutch Cable Holder Derbi STR8 Blue

4,50 €
In stock soon
Doppler
Chain Kit Doppler 13x53 - 428 Sherco 50 Alu Black
Article no.: CGN526754

Chain Kit Doppler 13x53 - 428 Sherco 50 Alu Black

102,00 €
In stock soon
Doppler
Chain Kit Doppler 13x53 - 428 Sherco 50 Alu Blue
Article no.: CGN526753

Chain Kit Doppler 13x53 - 428 Sherco 50 Alu Blue

102,00 €
In stock soon
Doppler
Rear Sprocket Doppler 53 teeth - 428 aluminum black Sherco 50
Article no.: CGN517733

Rear Sprocket Doppler 53 teeth - 428 aluminum black Sherco 50

69,50 €
In stock soon
Standard Parts
Rear Sprocket Premium 60 teeth - 420 black Fantic XM50 /XE50 after 2018
Article no.: IP49518

Rear Sprocket Premium 60 teeth - 420 black Fantic XM50 /XE50 after 2018

41,50 €
In stock soon
Standard Parts
Chain Kit 14x60 - 420 Afam Rieju MRT
Article no.: CGN516910

Chain Kit 14x60 - 420 Afam Rieju MRT

75,00 €
In stock soon
Doppler
Chain Kit steel Doppler 14x53 - 420 Origin Aprilia SX 50
Article no.: CGN515042

Chain Kit steel Doppler 14x53 - 420 Origin Aprilia SX 50

79,00 €
In stock soon
Doppler
Chain Kit steel 13x53 - 420 Doppler Origin Yamaha TZR 50
Article no.: CGN515038

Chain Kit steel 13x53 - 420 Doppler Origin Yamaha TZR 50

79,00 €
In stock soon
Doppler
Chain Kit steel 13x53 - 420 Doppler Origin Beta RR
Article no.: CGN515036

Chain Kit steel 13x53 - 420 Doppler Origin Beta RR

79,00 €
In stock soon
Doppler
Rear Sprocket 60 teeth Doppler aluminium CNC black MBK 51 / Peugeot 103
Article no.: CGN512881

Rear Sprocket 60 teeth Doppler aluminium CNC black MBK 51 / Peugeot 103

49,50 €
In stock soon
Doppler
Carrier Plate f. rear sprocket Doppler Alu aluminium black Peugeot 103
Article no.: CGN512883

Carrier Plate f. rear sprocket Doppler Alu aluminium black Peugeot 103

58,50 €
In stock soon
Doppler
Rear Sprocket steel 53 teeth - 420 Doppler Rieju MRT
Article no.: CGN509885

Rear Sprocket steel 53 teeth - 420 Doppler Rieju MRT

34,50 €
In stock soon
Standard Parts
Chain Tensioner Set galvanized Simson
Article no.: MOF-41891

Chain Tensioner Set galvanized Simson

3,90 €
In stock soon
Standard Parts
Chain Tensioner chrome Simson
Article no.: MOF-41871

Chain Tensioner chrome Simson

3,60 €
In stock soon
AFAM
Front Sprocket AFAM 13 teeth 520 Kymco KXR / Maxxer / MXU 250/300 / TGB Blade / Target
Article no.: AFAM76300-13

Front Sprocket AFAM 13 teeth 520 Kymco KXR / Maxxer / MXU 250/300 / TGB Blade / Target

15,00 €
In stock soon
AFAM
Front Sprocket AFAM 13 teeth 415 Aprilia RS 50 93 - 98
Article no.: AFAM94108-13

Front Sprocket AFAM 13 teeth 415 Aprilia RS 50 93 - 98

7,50 €
In stock soon
AFAM
Chain Kit AFAM 14x63 Beta RR 125 LC Motard / Enduro
Article no.: AFAMKS-A-39

Chain Kit AFAM 14x63 Beta RR 125 LC Motard / Enduro

53,50 €
In stock soon
AFAM
Chain Kit AFAM 14x35 Yamaha TT-R 110
Article no.: AFAMKS-A-67

Chain Kit AFAM 14x35 Yamaha TT-R 110

28,50 €
In stock soon
AFAM
Chain Kit AFAM 13x62 Aprilia SX125
Article no.: AFAMKS-A-190

Chain Kit AFAM 13x62 Aprilia SX125

60,50 €
In stock soon
AFAM
Chain Kit AFAM 11x48 Rieju RR
Article no.: AFAMKS-A-126

Chain Kit AFAM 11x48 Rieju RR

42,50 €
In stock soon
AFAM
Rear Sprocket steel 62 teeth - 428 Afam Rieju MRT
Article no.: AFAM47200-62

Rear Sprocket steel 62 teeth - 428 Afam Rieju MRT

33,00 €
In stock soon
AFAM
Rear Sprocket steel 50 teeth - 428 Afam Rieju MRT
Article no.: AFAM47200-50

Rear Sprocket steel 50 teeth - 428 Afam Rieju MRT

23,50 €
In stock soon
AFAM
Rear Sprocket steel 47 teeth - 420 AFAM Rieju RS2
Article no.: AFAM80104-47

Rear Sprocket steel 47 teeth - 420 AFAM Rieju RS2

21,00 €
In stock soon
Peugeot
Countershaft (for input shaft clutch with 12 teeth) Peugeot horizontal
Article no.: OE-PEU771884

Countershaft (for input shaft clutch with 12 teeth) Peugeot horizontal

140,00 €
In stock soon
Peugeot
Input Shaft clutch 12 teeth Peugeot horizontal
Article no.: OE-PEU771879

Input Shaft clutch 12 teeth Peugeot horizontal

90,00 €
In stock soon
Standard Parts
Front Sprocket 14 teeth Puch Maxi
Article no.: MOF-28889

Front Sprocket 14 teeth Puch Maxi

5,60 €
In stock soon
Standard Parts
Pedal Shaft Puch Maxi NM
Article no.: MOF-40226

Pedal Shaft Puch Maxi NM

24,00 €
In stock soon
Doppler
Chain Kit aluminium red 13x53 - 420 Doppler Beta RR
Article no.: CGN504011

Chain Kit aluminium red 13x53 - 420 Doppler Beta RR

99,00 €
In stock soon
Doppler
Chain Kit aluminium red 13x53 - 428 Doppler Sherco 50cc
Article no.: CGN504010

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

99,00 €
In stock soon
Doppler
Chain Kit aluminium black 13x53 - 428 Doppler Sherco 50cc
Article no.: CGN504009

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

101,00 €
In stock soon
Stage6
Chain Kit 14x53 - 420 Stage6 aluminium CNC green Derbi DRD Pro
Article no.: S6-2119314/GR

Chain Kit 14x53 - 420 Stage6 aluminium CNC green Derbi DRD Pro

88,44 €
Currently not in stock
93,10 €
-5% Set-Rabatt
Stage6
Chain Kit 13x53 - 420 Stage6 aluminium CNC green Derbi DRD Pro
Article no.: S6-2119313/GR

Chain Kit 13x53 - 420 Stage6 aluminium CNC green Derbi DRD Pro

87,40 €
Currently not in stock
92,00 €
-5% Set-Rabatt
Stage6
Chain Kit 13x53 - 420 Stage6 aluminium CNC red Rieju MRT
Article no.: S6-2118833/RE

Chain Kit 13x53 - 420 Stage6 aluminium CNC red Rieju MRT

77,42 €
Currently not in stock
81,50 €
-5% Set-Rabatt
Stage6
Chain Kit 14x53 - 420 Stage6 aluminium CNC red Rieju MRT
Article no.: S6-2118834/RE

Chain Kit 14x53 - 420 Stage6 aluminium CNC red Rieju MRT

78,37 €
Currently not in stock
82,50 €
-5% Set-Rabatt
Stage6
Chain Kit 14x53 - 420 Stage6 aluminium CNC red Derbi Senda X-treme
Article no.: S6-2119324/RE

Chain Kit 14x53 - 420 Stage6 aluminium CNC red Derbi Senda X-treme

76,57 €
Currently not in stock
80,60 €
-5% Set-Rabatt
Stage6
Chain Kit 13x53 - 420 Stage6 aluminium CNC red Derbi Senda X-treme
Article no.: S6-2119323/RE

Chain Kit 13x53 - 420 Stage6 aluminium CNC red Derbi Senda X-treme

76,57 €
Currently not in stock
80,60 €
-5% Set-Rabatt
Stage6
Chain Kit 14x53 - 420 Stage6 aluminium CNC Red Derbi DRD Pro
Article no.: S6-2119314/RE

Chain Kit 14x53 - 420 Stage6 aluminium CNC Red Derbi DRD Pro

76,57 €
Currently not in stock
80,60 €
-5% Set-Rabatt
Stage6
Chain Kit 13x53 - 420 Stage6 aluminium CNC Red Derbi DRD Pro
Article no.: S6-2119313/RE

Chain Kit 13x53 - 420 Stage6 aluminium CNC Red Derbi DRD Pro

76,57 €
Currently not in stock
80,60 €
-5% Set-Rabatt
Moose Racing
Oil Seal Set countershaft Moose Racing YZ 125 after 2005
Article no.: MR09350448

Oil Seal Set countershaft Moose Racing YZ 125 after 2005

21,50 €
Currently not in stock
Moose Racing
Rear Sprocket aluminium 520 Moose Racing Beta RR 42 teeth red
Article no.: MR12111859

Rear Sprocket aluminium 520 Moose Racing Beta RR 42 teeth red

39,50 €
Currently not in stock
Standard Parts
Chain Roller pin 8mm Apollo black
Article no.: MB7510

Chain Roller pin 8mm Apollo black

3,80 €
Currently not in stock
Standard Parts
Front Sprocket Retainer d.17mm Pit Bike
Article no.: MB2511

Front Sprocket Retainer d.17mm Pit Bike

2,60 €
Currently not 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 €
Currently not in stock
5,00 €
-6% Discount
Standard Parts
Chain Guide PTFE screw spacing 33mm black Pit Bike / Dirt Bike
Article no.: MB2477

Chain Guide PTFE screw spacing 33mm black Pit Bike / Dirt Bike

13,00 €
Currently not 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

99,00 €
Currently not 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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