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Product type
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
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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Voca Racing
Rear Sprocket Aprilia SX 50cc 50 teeth - 420 Voca Alu black
Article no.: VCR-SD450.SDA.50/BK

Rear Sprocket Aprilia SX 50cc 50 teeth - 420 Voca Alu black

49,00 €
Currently not in stock
Voca Racing
Rear Sprocket Aprilia SX 50cc 48 teeth - 420 Voca Alu red
Article no.: VCR-SD450.SDA.48/RE

Rear Sprocket Aprilia SX 50cc 48 teeth - 420 Voca Alu red

48,00 €
Currently not in stock
UFO
Swingarm Slider Yamaha YZ 85 2002-2018 black UFO
Article no.: UF-YA03894#001

Swingarm Slider Yamaha YZ 85 2002-2018 black UFO

16,50 €
Currently not in stock
UFO
Swingarm Slider KTM SX 85 after 2015 UFO black
Article no.: UF-KT04056#001

Swingarm Slider KTM SX 85 after 2015 UFO black

18,00 €
Currently not in stock
Doppler
Chain Kit Doppler 13x53 - 428 Sherco 50 Alu Black
Article no.: CGN526754

Chain Kit Doppler 13x53 - 428 Sherco 50 Alu Black

102,00 €
Currently not in stock
Doppler
Chain Kit Doppler 13x53 - 428 Sherco 50 Alu Neochrome
Article no.: CGN526755

Chain Kit Doppler 13x53 - 428 Sherco 50 Alu Neochrome

112,00 €
Currently not in stock
Doppler
Chain Kit Doppler 13x53 - 428 Sherco 50 Alu Blue
Article no.: CGN526753

Chain Kit Doppler 13x53 - 428 Sherco 50 Alu Blue

102,00 €
Currently not in stock
AFAM
Chain Kit Rieju MRT after 2018 Afam 11x62
Article no.: CGN518452

Chain Kit Rieju MRT after 2018 Afam 11x62

74,00 €
Currently not in stock
Doppler
Chain Guide Doppler Rieju MRT Neochrome
Article no.: CGN520883

Chain Guide Doppler Rieju MRT Neochrome

36,50 €
Currently not in stock
Doppler
Rear Sprocket steel 53Z - 420 Doppler Origin Peugeot / Rieju
Article no.: CGN509888

Rear Sprocket steel 53Z - 420 Doppler Origin Peugeot / Rieju

32,00 €
Currently not in stock
AFAM
Chain Master Link clip AFAM ARS A428MX-G gold
Article no.: AFAMARSA428MX-G

Chain Master Link clip AFAM ARS A428MX-G gold

5,70 €
Currently not in stock
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

42,50 €
Currently not in stock
Standard Parts
Rear Sprocket Premium 58 teeth - 420 black Fantic XM50 / XE50 after 2018
Article no.: IP49517

Rear Sprocket Premium 58 teeth - 420 black Fantic XM50 / XE50 after 2018

45,00 €
Currently not in stock
Standard Parts
Moped Chain 112 links
Article no.: CGN509804

Moped Chain 112 links

8,40 €
Currently not in stock
RFX
Chain Roller RFX Race green 38mm Kawasaki KXF 250 / 450
Article no.: R-FXCR2010055GN

Chain Roller RFX Race green 38mm Kawasaki KXF 250 / 450

12,00 €
Currently not in stock
RFX
Chain Roller RFX Race black 32mm universal
Article no.: R-FXCR1003255BK

Chain Roller RFX Race black 32mm universal

11,00 €
Currently not in stock
Standard Parts
Spacer idle gear 24x35x1,0mm gearbox Simson
Article no.: MOF-41496

Spacer idle gear 24x35x1,0mm gearbox Simson

1,20 €
Currently not in stock
Standard Parts
Chain Guide / Frame Guard Puch Maxi N
Article no.: IP44214

Chain Guide / Frame Guard Puch Maxi N

11,00 €
Currently not in stock
Standard Parts
Chain Guide / Frame Guard Puch Maxi S
Article no.: IP44151

Chain Guide / Frame Guard Puch Maxi S

7,70 €
Currently not in stock
Standard Parts
Chain Kit 14x60 - 420 Afam Rieju MRT
Article no.: CGN516910

Chain Kit 14x60 - 420 Afam Rieju MRT

75,00 €
Currently not in stock
Doppler
Chain Kit steel 13x53 Doppler Origin Rieju MRT
Article no.: CGN517747

Chain Kit steel 13x53 Doppler Origin Rieju MRT

79,00 €
Currently not in stock
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC red Fantic Caballero before 2015
Article no.: CGN515220

Rear Sprocket 53 teeth - 420 Doppler aluminium CNC red Fantic Caballero before 2015

53,50 €
Currently not in stock
Doppler
Chain Kit steel 14x53 - 420 Doppler Origin Derbi Senda DRD
Article no.: CGN515040

Chain Kit steel 14x53 - 420 Doppler Origin Derbi Senda DRD

79,00 €
Currently not in stock
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 €
Currently not in stock
Polini
Secondary Gears Polini 15/39 Honda SH 125/150i before 2012
Article no.: P202.1408

Secondary Gears Polini 15/39 Honda SH 125/150i before 2012

115,00 €
Currently not in stock
RRP
138,00 €
-17% Discount
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 €
Currently not in stock
Doppler
Plate f. rear sprocket Doppler aluminium black Peugeot 103
Article no.: CGN512883

Plate f. rear sprocket Doppler aluminium black Peugeot 103

58,50 €
Currently not in stock
Conti
Rear Sprocket bi-metal red 53 teeth - 420 Conti CHR Aprilia SX 50
Article no.: CGN513622

Rear Sprocket bi-metal red 53 teeth - 420 Conti CHR Aprilia SX 50

68,00 €
Currently not in stock
Conti
Rear Sprocket bimetal red 53 teeth - 428 Conti CHR Beta RR
Article no.: CGN513620

Rear Sprocket bimetal red 53 teeth - 428 Conti CHR Beta RR

67,50 €
Currently not in stock
Moto Master
Chain Moto Master GP-520 GOLD 120 links (clip links)
Article no.: MMAST-12200451

Chain Moto Master GP-520 GOLD 120 links (clip links)

85,00 €
Currently not in stock
Moto Master
Front Sprocket Moto Master 520 13 teeth Sherco SE-F 250 / 300
Article no.: MMAST-12121543

Front Sprocket Moto Master 520 13 teeth Sherco SE-F 250 / 300

16,00 €
Currently not in stock
Moto Master
Front Sprocket Moto Master 520 14 teeth KTM / Husqvarna / Beta / GasGas
Article no.: MMAST-12121484

Front Sprocket Moto Master 520 14 teeth KTM / Husqvarna / Beta / GasGas

18,00 €
Currently not in stock
Moto Master
Front Sprocket Moto Master 520 13 teeth KTM / Husqvarna / Beta / GasGas
Article no.: MMAST-12121483

Front Sprocket Moto Master 520 13 teeth KTM / Husqvarna / Beta / GasGas

18,00 €
Currently not in stock
Moto Master
Front Sprocket Moto Master 520 13 teeth YZF 250 / 450
Article no.: MMAST-12121476

Front Sprocket Moto Master 520 13 teeth YZF 250 / 450

16,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 48 teeth blue TM Racing MX / EN
Article no.: MMAST-12112455

Rear Sprocket Moto Master 520 aluminium 48 teeth blue TM Racing MX / EN

49,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 51 teeth blue YZ / YZF
Article no.: MMAST-12112312

Rear Sprocket Moto Master 520 aluminium 51 teeth blue YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 45 teeth blue YZ / YZF
Article no.: MMAST-12112306

Rear Sprocket Moto Master 520 aluminium 45 teeth blue YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 48 teeth black YZ / YZF
Article no.: MMAST-12112296

Rear Sprocket Moto Master 520 aluminium 48 teeth black YZ / YZF

54,00 €
Currently not in stock
Moto Master
Rear Sprocket MotoMaster 520 aluminium 45 teeth black KTM / Husqvarna
Article no.: MMAST-12112198

Rear Sprocket MotoMaster 520 aluminium 45 teeth black KTM / Husqvarna

53,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 aluminium 43 teeth black KTM / Husqvarna
Article no.: MMAST-12112196

Rear Sprocket Moto Master 520 aluminium 43 teeth black KTM / Husqvarna

52,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 420 aluminium 55 teeth red CR 85 / CRF 150
Article no.: MMAST-12112121

Rear Sprocket Moto Master 420 aluminium 55 teeth red CR 85 / CRF 150

51,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 steel 47 teeth KTM / Husqvarna
Article no.: MMAST-12102302

Rear Sprocket Moto Master 520 steel 47 teeth KTM / Husqvarna

50,50 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 steel 48 teeth YZ / YZF
Article no.: MMAST-12102267

Rear Sprocket Moto Master 520 steel 48 teeth YZ / YZF

45,00 €
Currently not in stock
Moto Master
Rear Sprocket Moto Master 520 steel 42 teeth YZ / YZF
Article no.: MMAST-12102261

Rear Sprocket Moto Master 520 steel 42 teeth YZ / YZF

44,50 €
Currently not in stock
45,00 €
-1% Discount
Moto Master
Rear Sprocket Moto Master 520 steel 44 teeth KX /KXF
Article no.: MMAST-12102244

Rear Sprocket Moto Master 520 steel 44 teeth KX /KXF

45,00 €
Currently not in stock
Doppler
Chain Tensioner wheel axle 15mm Doppler Alu CNC red Derbi / Gilera / Aprilia
Article no.: CGN508644

Chain Tensioner wheel axle 15mm Doppler Alu CNC red Derbi / Gilera / Aprilia

26,00 €
Currently not in stock
Doppler
Chain Tensioner wheel axle 15mm Doppler Alu CNC black Derbi / Gilera / Aprilia
Article no.: CGN508645

Chain Tensioner wheel axle 15mm Doppler Alu CNC black Derbi / Gilera / Aprilia

25,50 €
Currently not in stock
Doppler
Chain Tensioner axle 15mm Doppler Alu CNC blue Derbi / Gilera / Aprilia
Article no.: CGN508647

Chain Tensioner axle 15mm Doppler Alu CNC blue Derbi / Gilera / Aprilia

26,00 €
Currently not in stock
Doppler
Chain Tensioner wheel axle 12mm Doppler Alu CNC red Derbi / Gilera / Aprilia
Article no.: CGN508640

Chain Tensioner wheel axle 12mm Doppler Alu CNC red Derbi / Gilera / Aprilia

25,50 €
Currently not in stock
Doppler
Chain Tensioner 12mm axle Doppler Alu CNC gold Derbi / Gilera / Aprilia
Article no.: CGN508642

Chain Tensioner 12mm axle Doppler Alu CNC gold Derbi / Gilera / Aprilia

26,00 €
Currently not in stock
Doppler
Chain Tensioner wheel axle 12mm Doppler Alu CNC blue Derbi / Gilera / Aprilia
Article no.: CGN508643

Chain Tensioner wheel axle 12mm Doppler Alu CNC blue Derbi / Gilera / Aprilia

25,50 €
Currently not in stock
Doppler
Front Sprocket Doppler - 428 Black coating Minarelli AM6
Article no.: CGN428NOIRAM6

Front Sprocket Doppler - 428 Black coating Minarelli AM6

from 8,00 €
Currently not in stock
12,50 €
-36% Discount
Doppler
Rear Sprocket 53 teeth - 428 Doppler aluminium CNC blue Sherco Enduro 50
Article no.: CGN508243

Rear Sprocket 53 teeth - 428 Doppler aluminium CNC blue Sherco Enduro 50

65,00 €
Currently not in stock
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC blue Rieju MRT
Article no.: CGN508244

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

54,00 €
Currently not in stock
Polini
Primary Gears Polini 13/40 Piaggio NRG after 1998
Article no.: P202.1378
3

Primary Gears Polini 13/40 Piaggio NRG after 1998

88,00 €
Currently not in stock
RRP
94,00 €
-6% Discount
Polini
Primary Gears Polini 13/44 Yamaha Aerox / BW's
Article no.: P202.1370
1

Primary Gears Polini 13/44 Yamaha Aerox / BW's

79,50 €
Currently not in stock
RRP
90,00 €
-12% Discount
Polini
Secondary Gears Polini 16/44 Peugeot Speedfight / Ludix
Article no.: P202.1352
2

Secondary Gears Polini 16/44 Peugeot Speedfight / Ludix

85,00 €
Currently not in stock
RRP
92,00 €
-8% Discount
Polini
Secondary Gears Polini 15/42 Minarelli 15/42 1:280
Article no.: P202.1346
3

Secondary Gears Polini 15/42 Minarelli 15/42 1:280

79,50 €
Currently not in stock
RRP
90,00 €
-12% Discount
Polini
Secondary Gears Polini 14/41 Yamaha Aerox / BW's
Article no.: P202.1321
6

Secondary Gears Polini 14/41 Yamaha Aerox / BW's

86,50 €
Currently not in stock
RRP
90,00 €
-4% Discount
Buzzetti
Chain Tensioner Buzzetti Gilera EC1 / Piaggio / Vespa Ciao
Article no.: WB-30429

Chain Tensioner Buzzetti Gilera EC1 / Piaggio / Vespa Ciao

10,50 €
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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