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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 Oil seal kit Piston pin bearing 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
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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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AFAM
Chain AFAM reinforced gold 428 R1-G
Article no.: AFAM428R1-G/SIZE

Chain AFAM reinforced gold 428 R1-G

from 15,00 €
In stock
AFAM
Chain AFAM reinforced gold 420 R1-G
Article no.: AFAM420R1-G/SIZE

Chain AFAM reinforced gold 420 R1-G

from 11,00 €
In stock
AFAM
Chain AFAM reinforced black 415
Article no.: AFAM415F/SIZE

Chain AFAM reinforced black 415

from 21,50 €
In stock
22,00 €
-2% Discount
AFAM
Chain AFAM black 420
Article no.: AFAM420M/SIZE

Chain AFAM black 420

from 17,00 €
In stock
Moose Racing
HPO O-Ring 520 chain Moose Racing
Article no.: MRM57300_MASTER

HPO O-Ring 520 chain Moose Racing

from 57,50 €
In stock
81,00 €
-29% Discount
Moose Racing
RXP Pro-MX420 Chain Moose Racing
Article no.: MRM57600_MASTER

RXP Pro-MX420 Chain Moose Racing

from 24,00 €
In stock
26,00 €
-8% Discount
Moose Racing
Moose Racing RXP Pro-MX 520 Chain
Article no.: MRM57400_MASTER

Moose Racing RXP Pro-MX 520 Chain

from 74,00 €
In stock
77,00 €
-4% Discount
Piaggio
Wheel Axle Piaggio 4-stroke 4V
Article no.: OE-PIA8416875

Wheel Axle Piaggio 4-stroke 4V

99,00 €
In stock
Piaggio
Countershaft Piaggio NRG, TPH '01-'05, Aprilia SR50R
Article no.: OE-PIA4802185

Countershaft Piaggio NRG, TPH '01-'05, Aprilia SR50R

197,00 €
In stock
Sale
Piaggio
Input Shaft clutch Piaggio Zip2 after 2006
Article no.: OE-PIA4795934

Input Shaft clutch Piaggio Zip2 after 2006

177,00 €
In stock
Peugeot
Countershaft Peugeot/SYM 4-stroke
Article no.: OE-PEU801624

Countershaft Peugeot/SYM 4-stroke

176,00 €
In stock
206,00 €
-15% Discount
Peugeot
Countershaft (input shaft with 12 teeth) Peugeot horizontal
Article no.: OE-PEU771884

Countershaft (input shaft with 12 teeth) Peugeot horizontal

119,00 €
In stock
140,00 €
-15% Discount
Derbi
Screw rear sprocket M8x1.00 - 30mm Derbi
Article no.: OE-DE00022083021

Screw rear sprocket M8x1.00 - 30mm Derbi

2,00 €
In stock
YCF Factory
Chain Tensioners aluminium CNC aluminium swingarm d.15mm YCF Pit Bike
Article no.: YCF-TC12/COLOR

Chain Tensioners aluminium CNC aluminium swingarm d.15mm YCF Pit Bike

15,00 €
In stock
YCF Factory
Chain Tensioners aluminium CNC steel swingarm d.15mm YCF Pit Bike
Article no.: YCF-TC07/COLOR

Chain Tensioners aluminium CNC steel swingarm d.15mm YCF Pit Bike

from 10,50 €
In stock
20,50 €
-49% Discount
YCF
Chain Roller Pit Bike YCF50A
Article no.: YCF-50-2201

Chain Roller Pit Bike YCF50A

4,10 €
In stock
RRP
11,00 €
-63% Discount
YCF
Swingarm Slider short for cantilever swingarm Pit Bike / Dirt Bike
Article no.: YCF-110-10-021

Swingarm Slider short for cantilever swingarm Pit Bike / Dirt Bike

4,10 €
In stock
RRP
11,00 €
-63% Discount
YCF
Swingarm Slider left side Pit Bike Zongshen 190cc
Article no.: MB100061491

Swingarm Slider left side Pit Bike Zongshen 190cc

0,90 €
In stock
RRP
2,20 €
-59% Discount
YCF Factory
Rear Sprocket aluminium CNC 420 - 47 teeth - 4 screws YCF Pit Bike
Article no.: MBCA06R.47/COLOR

Rear Sprocket aluminium CNC 420 - 47 teeth - 4 screws YCF Pit Bike

from 22,00 €
In stock
41,50 €
-47% Discount
YCF Factory
Rear Sprocket aluminium CNC 420 - 45 teeth - 5 screws YCF Pit Bike
Article no.: MBCA16R.45/COLOR

Rear Sprocket aluminium CNC 420 - 45 teeth - 5 screws YCF Pit Bike

22,00 €
In stock
41,50 €
-47% Discount
YCF Factory
Rear Sprocket aluminium CNC 420 - 45 teeth - 4 screws YCF Pit Bike
Article no.: MBCA06R.45/COLOR

Rear Sprocket aluminium CNC 420 - 45 teeth - 4 screws YCF Pit Bike

from 22,00 €
In stock
41,50 €
-47% Discount
YCF Factory
Rear Sprocket aluminium CNC 420 - 43 teeth - 5 screws YCF Pit Bike blue
Article no.: MBCA16R.43BL

Rear Sprocket aluminium CNC 420 - 43 teeth - 5 screws YCF Pit Bike blue

46,00 €
In stock
YCF Factory
Rear Sprocket aluminium CNC 420 - 43 teeth - 5 screws YCF Pit Bike
Article no.: MBCA16R.43/COLOR

Rear Sprocket aluminium CNC 420 - 43 teeth - 5 screws YCF Pit Bike

22,00 €
In stock
41,50 €
-47% Discount
YCF Factory
Rear Sprocket aluminium CNC 420 - 43 teeth - 4 screws YCF Pit Bike
Article no.: MBCA06R.43/COLOR

Rear Sprocket aluminium CNC 420 - 43 teeth - 4 screws YCF Pit Bike

from 21,00 €
In stock
41,50 €
-49% Discount
YCF Factory
Rear Sprocket aluminium CNC 420 - 41 teeth - 5 screws YCF Pit Bike
Article no.: MBCA16R.41/COLOR

Rear Sprocket aluminium CNC 420 - 41 teeth - 5 screws YCF Pit Bike

22,00 €
In stock
41,50 €
-47% Discount
YCF Factory
Rear Sprocket aluminium CNC 420 - 41 teeth - 4 screws YCF Pit Bike
Article no.: MBCA06R.41/COLOR

Rear Sprocket aluminium CNC 420 - 41 teeth - 4 screws YCF Pit Bike

22,00 €
In stock
41,50 €
-47% Discount
YCF Factory
Rear Sprocket aluminium CNC 420 - 37 teeth - 4 screws YCF Pit Bike
Article no.: MBCA06R.37/COLOR

Rear Sprocket aluminium CNC 420 - 37 teeth - 4 screws YCF Pit Bike

30,50 €
In stock
YCF
Mounting Bracket rear sprocket x1 Pit Bike / Dirt Bike
Article no.: YCF-110-11-03

Mounting Bracket rear sprocket x1 Pit Bike / Dirt Bike

2,50 €
In stock
YCF
Secondary Gears d.17mm Pit Bike YX 125cc
Article no.: MBE13K040

Secondary Gears d.17mm Pit Bike YX 125cc

37,00 €
In stock
Sale
YCF
Primary Transmission Pit Bike Lifan 88SE / 125SE
Article no.: MB23220-D002-0000

Primary Transmission Pit Bike Lifan 88SE / 125SE

20,00 €
In stock
RRP
53,00 €
-62% Discount
Buzzetti
Chain Tensioner Buzzetti universal cyclomoteurs 12x7x47mm
Article no.: BZA30233

Chain Tensioner Buzzetti universal cyclomoteurs 12x7x47mm

4,20 €
In stock
Standard Parts
Front Sprocket 17 teeth Puch Maxi
Article no.: MOF-28893
1

Front Sprocket 17 teeth Puch Maxi

3,80 €
In stock
Standard Parts
Front Sprocket 16 teeth Puch Maxi
Article no.: MOF-28892

Front Sprocket 16 teeth Puch Maxi

4,30 €
In stock
Standard Parts
Front Sprocket 14 teeth Puch Maxi
Article no.: MOF-28889

Front Sprocket 14 teeth Puch Maxi

5,60 €
In stock
Standard Parts
Front Sprocket 13 teeth Puch Maxi
Article no.: MOF-28890

Front Sprocket 13 teeth Puch Maxi

4,10 €
In stock
Standard Parts
Front Sprocket 12 teeth Puch Maxi
Article no.: MOF-28888

Front Sprocket 12 teeth Puch Maxi

3,70 €
In stock
Standard Parts
Front Sprocket 11 teeth Puch Maxi
Article no.: MOF-28887

Front Sprocket 11 teeth Puch Maxi

3,70 €
In stock
Standard Parts
Front Sprocket 10 teeth Puch Maxi
Article no.: MOF-28886

Front Sprocket 10 teeth Puch Maxi

3,50 €
In stock
Standard Parts
Rear Sprocket 45 teeth Puch Maxi silver
Article no.: MOF-34241

Rear Sprocket 45 teeth Puch Maxi silver

11,50 €
In stock
Doppler
Chain Kit aluminium Neochrome 13x53 - 420 Rieju MRT / Yamaha DT
Article no.: CGN509945

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

95,00 €
In stock
Doppler
Chain Kit aluminium Neochrome 13x53 - 428 Doppler Beta RR
Article no.: CGN509940

Chain Kit aluminium Neochrome 13x53 - 428 Doppler Beta RR

84,00 €
In stock
Sale
Doppler
Chain Kit aluminium Neochrome 13x53 - 420 Doppler Beta RR
Article no.: CGN509939

Chain Kit aluminium Neochrome 13x53 - 420 Doppler Beta RR

84,00 €
In stock
Sale
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

56,00 €
In stock
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

25,00 €
In stock
RRP
69,50 €
-64% 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

56,00 €
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

90,00 €
In stock
Sale
Doppler
Chain Kit aluminium red 13x53 - 428 Doppler Sherco 50cc
Article no.: CGN504010

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

87,00 €
In stock
Sale
Doppler
Chain Kit aluminium black 13x53 - 428 Doppler Sherco 50cc
Article no.: CGN504009

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

87,00 €
In stock
Sale
Doppler
Chain Kit aluminium black 14x53 - 420 Doppler Derbi GPR / Senda X-treme
Article no.: CGN503782

Chain Kit aluminium black 14x53 - 420 Doppler Derbi GPR / Senda X-treme

81,00 €
In stock
82,00 €
-1% Discount
Sale
Doppler
Chain Kit aluminium red 14x53 - 420 Doppler Derbi Senda DRD
Article no.: CGN503777

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

40,00 €
In stock
RRP
99,00 €
-60% Discount
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 soon
MotoForce
Chain Tensioner diameter 15mm Derbi Senda
Article no.: MF99.20178
2

Chain Tensioner diameter 15mm Derbi Senda

3,90 €
In stock soon
4,00 €
-3% Discount
MotoForce
Gearbox AM6
Article no.: MF60.18861

Gearbox AM6

91,00 €
In stock soon
Stage6
Chain 420 Stage6 HQ purple
Article no.: S6-2010006

Chain 420 Stage6 HQ purple

35,00 €
In stock soon
Malossi
Wheel Axle / Driveshaft Malossi C-One / RC-One Minarelli
Article no.: M6716430B

Wheel Axle / Driveshaft Malossi C-One / RC-One Minarelli

90,50 €
In stock soon
Malossi
Secondary Gear Kit / Gears Malossi 15/42 Minarelli
Article no.: M6714774

Secondary Gear Kit / Gears Malossi 15/42 Minarelli

93,00 €
In stock soon
Malossi
Secondary Gears Malossi 15/47 Vespa ET4 / LX 2V 50cc
Article no.: M6712144

Secondary Gears Malossi 15/47 Vespa ET4 / LX 2V 50cc

100,00 €
In stock soon
Malossi
Primary Gears Malossi Honda Bali 17/39
Article no.: M677758

Primary Gears Malossi Honda Bali 17/39

60,00 €
In stock soon
RRP
62,00 €
-3% Discount
Malossi
Primary Gear Shaft for Malossi MHR Over Range Piaggio Si
Article no.: M6718823

Primary Gear Shaft for Malossi MHR Over Range Piaggio Si

73,50 €
In stock soon
RRP
80,00 €
-8% Discount
Malossi
Secondary Gears Malossi 13/48 Piaggio NRG after 1998
Article no.: M679966
3

Secondary Gears Malossi 13/48 Piaggio NRG after 1998

95,00 €
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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