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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
Roller for Chain Tensioner size=32mm inner diameter 8mm
Article no.: CGN440593
3

Roller for Chain Tensioner size=32mm inner diameter 8mm

9,40 €
In stock
Top Performances
Secondary Gears 16/41 Top Performances Minarelli / Aerox
Article no.: T990875P
1

Secondary Gears 16/41 Top Performances Minarelli / Aerox

112,00 €
In stock
Sale
Polini
Wheel Axle / Driveshaft reinforced Polini Piaggio NRG / Typhoon after 1998
Article no.: P202.1410
1

Wheel Axle / Driveshaft reinforced Polini Piaggio NRG / Typhoon after 1998

92,50 €
In stock
Standard Parts
Chain Kit 12x47 (size=420) Aprilia RS 1999 - 2004 (AM6)
Article no.: CGN455167
7

Chain Kit 12x47 (size=420) Aprilia RS 1999 - 2004 (AM6)

45,50 €
In stock
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

52,00 €
In stock
Sale
Iris
Chain Iris standard 120 links size 415
Article no.: CGN3038
2

Chain Iris standard 120 links size 415

12,50 €
In stock
Standard Parts
Chain Iris Racing super reinforced 120 links size 415 moped
Article no.: CGN3043
1

Chain Iris Racing super reinforced 120 links size 415 moped

22,50 €
In stock
Iris
Chain Iris standard 108 links size 415
Article no.: CGN259273

Chain Iris standard 108 links size 415

8,90 €
In stock
Iris
Chain Iris reinforced 108 links size 415 gold
Article no.: CGN321025

Chain Iris reinforced 108 links size 415 gold

15,50 €
In stock
Iris
Chain Iris reinforced 106 links size 415 gold
Article no.: CGN3039
1

Chain Iris reinforced 106 links size 415 gold

10,00 €
In stock
14,50 €
-31% Discount
Sale
Top Performances
Gearwheel 6th gear primary shaft Top Performances T26 AM6 V1
Article no.: T9919080
9

Gearwheel 6th gear primary shaft Top Performances T26 AM6 V1

45,00 €
In stock
Sale
Conti
Pinion / Adapter Conti 14 teeth Derbi Euro 3 crankshaft on Euro 2
Article no.: CT0107RF1210
3

Pinion / Adapter Conti 14 teeth Derbi Euro 3 crankshaft on Euro 2

26,50 €
In stock
Polini
Secondary Gears Polini 16/47 Piaggio NRG after 1998
Article no.: P202.1402
1

Secondary Gears Polini 16/47 Piaggio NRG after 1998

90,50 €
In stock
Top Performances
Gear Shift Cam Top Performances
Article no.: T9920020
4

Gear Shift Cam Top Performances

74,00 €
In stock
Sale
Standard Parts
Chain Tensioner
Article no.: A170700

Chain Tensioner

4,00 €
In stock
Voca Racing
Rear Sprocket 40 teeth - 420 Voca Alu Neochrome Yamaha DT 50 LC Portugal
Article no.: VCR-SD450.YDT.40/TI

Rear Sprocket 40 teeth - 420 Voca Alu Neochrome Yamaha DT 50 LC Portugal

40,00 €
In stock
Sale
Voca Racing
Rear Sprocket 40 teeth - 420 Voca Alu Red Yamaha DT 50 LC Portugal
Article no.: VCR-SD450.YDT.40/RE

Rear Sprocket 40 teeth - 420 Voca Alu Red Yamaha DT 50 LC Portugal

37,00 €
In stock
Sale
Top Performances
Secondary Gears 13/42 Top Performances Minarelli
Article no.: TCI07452

Secondary Gears 13/42 Top Performances Minarelli

55,00 €
In stock
Sale
Doppler
Rear Sprocket 53 teeth - 428 Doppler aluminium CNC purple Beta RR 50
Article no.: CGN533904

Rear Sprocket 53 teeth - 428 Doppler aluminium CNC purple Beta RR 50

52,00 €
In stock
54,00 €
-4% Discount
Sale
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC purple Beta RR 50
Article no.: CGN533903

Rear Sprocket 53 teeth - 420 Doppler aluminium CNC purple Beta RR 50

50,50 €
In stock
Doppler
Rear Sprocket aluminium Fantic XM / XE Doppler 53 teeth - 420 red
Article no.: CGN534141

Rear Sprocket aluminium Fantic XM / XE Doppler 53 teeth - 420 red

49,50 €
In stock
50,50 €
-2% Discount
Doppler
Rear Sprocket steel 53 teeth - 420 Doppler Origin Beta RR (02 - 05) and Caballero
Article no.: CGN528469

Rear Sprocket steel 53 teeth - 420 Doppler Origin Beta RR (02 - 05) and Caballero

30,50 €
In stock
Standard Parts
Chain Tensioner Puch Maxi
Article no.: MOF-44133

Chain Tensioner Puch Maxi

7,50 €
In stock
Standard Parts
Chain Guard reinforced Derbi Senda / Aprilia SX / Gilera SMT aluminium black
Article no.: STR-730.10/BK

Chain Guard reinforced Derbi Senda / Aprilia SX / Gilera SMT aluminium black

30,00 €
In stock
Standard Parts
Chain Guard reinforced Beta RR 50 / 125 aluminium black
Article no.: STR-730.12/BK

Chain Guard reinforced Beta RR 50 / 125 aluminium black

46,00 €
In stock
Standard Parts
Chain Guard reinforced Rieju MRT aluminium black
Article no.: STR-730.11/BK

Chain Guard reinforced Rieju MRT aluminium black

31,50 €
In stock
Standard Parts
Rear Sprocket Premium 60 teeth 428 Vent Derapage / Baja 50 Euro 5
Article no.: SP-52651

Rear Sprocket Premium 60 teeth 428 Vent Derapage / Baja 50 Euro 5

58,50 €
In stock
Standard Parts
Rear Sprocket steel 62 teeth 420 CPI SM
Article no.: MF89.00374

Rear Sprocket steel 62 teeth 420 CPI SM

25,50 €
In stock
Standard Parts
Chain Tensioner Set 12mm aluminium Puch / Simson / Kreidler / Sachs silver
Article no.: MOF-43010/SI

Chain Tensioner Set 12mm aluminium Puch / Simson / Kreidler / Sachs silver

9,00 €
In stock
Sale
Standard Parts
Chain Tensioner Set 12mm aluminium Puch / Simson / Kreidler / Sachs red
Article no.: MOF-43010/RE

Chain Tensioner Set 12mm aluminium Puch / Simson / Kreidler / Sachs red

9,00 €
In stock
Sale
Standard Parts
Chain Tensioner Set 12mm aluminium Puch / Simson / Kreidler / Sachs black
Article no.: MOF-43010/BK

Chain Tensioner Set 12mm aluminium Puch / Simson / Kreidler / Sachs black

9,00 €
In stock
Sale
Standard Parts
Chain Tensioner Set 12mm aluminium Puch / Simson / Kreidler / Sachs blue
Article no.: MOF-43010/BL

Chain Tensioner Set 12mm aluminium Puch / Simson / Kreidler / Sachs blue

9,00 €
In stock
Sale
Standard Parts
Rear Sprocket 48 teeth Peugeot 101 / 102
Article no.: CGN534531

Rear Sprocket 48 teeth Peugeot 101 / 102

15,00 €
In stock
Standard Parts
Rear Sprocket 42 teeth Peugeot 101 / 102
Article no.: CGN534532

Rear Sprocket 42 teeth Peugeot 101 / 102

15,00 €
In stock
Standard Parts
Shift Drum Lock Lever Kit Generic / CPI / KSR
Article no.: MF60.19508

Shift Drum Lock Lever Kit Generic / CPI / KSR

13,50 €
In stock
Standard Parts
Chain Tensioner Roll Derbi Senda
Article no.: MF89.00160

Chain Tensioner Roll Derbi Senda

12,00 €
In stock
Standard Parts
Swingarm Slider Rieju MRT
Article no.: MF89.00185

Swingarm Slider Rieju MRT

12,00 €
In stock
AFAM
Chain Kit Sherco SE-R 50 Afam 14x56 - 428
Article no.: AFAM173014

Chain Kit Sherco SE-R 50 Afam 14x56 - 428

65,00 €
In stock
AFAM
Chain Kit Aprilia SX 50 2012 - 2017 Afam 11x53 - 420 (original gear ratio)
Article no.: AFAM167783

Chain Kit Aprilia SX 50 2012 - 2017 Afam 11x53 - 420 (original gear ratio)

56,00 €
In stock
AFAM
Chain Kit Aprilia RX 50 2006 - 2017 Afam 11x53 - 420 (original gear ratio)
Article no.: AFAM31761

Chain Kit Aprilia RX 50 2006 - 2017 Afam 11x53 - 420 (original gear ratio)

55,00 €
In stock
AFAM
Chain Kit Aprilia RX 50 1995 - 1998 Afam 12x51 - 420 (original gear ratio)
Article no.: AFAM31762

Chain Kit Aprilia RX 50 1995 - 1998 Afam 12x51 - 420 (original gear ratio)

57,50 €
In stock
AFAM
Chain Kit Aprilia RX 2002 - 2006 Afam 11x51 - 420 (original gear ratio)
Article no.: AFAM31760

Chain Kit Aprilia RX 2002 - 2006 Afam 11x51 - 420 (original gear ratio)

56,00 €
In stock
AFAM
Chain Kit Aprilia RS 50 2006 - 2011 Afam 11x53 - 420 (original gear ratio)
Article no.: AFAM4305

Chain Kit Aprilia RS 50 2006 - 2011 Afam 11x53 - 420 (original gear ratio)

56,00 €
In stock
AFAM
Chain Kit Aprilia RS 50 2003 - 2005 Afam 11x47 - 420 (original gear ratio)
Article no.: AFAM4304

Chain Kit Aprilia RS 50 2003 - 2005 Afam 11x47 - 420 (original gear ratio)

57,50 €
In stock
AFAM
Chain Kit Aprilia MX / SM 50 2003 - 2005 Afam 11x51 - 420 (original gear ratio)
Article no.: AFAM32035

Chain Kit Aprilia MX / SM 50 2003 - 2005 Afam 11x51 - 420 (original gear ratio)

56,00 €
In stock
Standard Parts
Gear Selector Fork left secondary shaft type AM6 Generic / CPI / KSR
Article no.: MF60.19507

Gear Selector Fork left secondary shaft type AM6 Generic / CPI / KSR

14,50 €
In stock
Standard Parts
Gear Selector Fork right secondary shaft type AM6 Generic / CPI / KSR
Article no.: MF60.19506

Gear Selector Fork right secondary shaft type AM6 Generic / CPI / KSR

14,50 €
In stock
Standard Parts
Gear Selector Fork primary shaft type AM6 Generic / CPI / KSR
Article no.: MF60.19505

Gear Selector Fork primary shaft type AM6 Generic / CPI / KSR

14,50 €
In stock
AFAM
Rear Sprocket Sherco SM 50 Afam 56 teeth - 428
Article no.: AFAM205406

Rear Sprocket Sherco SM 50 Afam 56 teeth - 428

54,00 €
In stock
Sale
AFAM
Rear Sprocket steel Suzuki RMX / SMX Afam 50 teeth - 420
Article no.: AFAM160796

Rear Sprocket steel Suzuki RMX / SMX Afam 50 teeth - 420

26,00 €
In stock
AFAM
Rear Sprocket steel Sherco HRD Afam 56 teeth - 428
Article no.: AFAM160814

Rear Sprocket steel Sherco HRD Afam 56 teeth - 428

58,00 €
In stock
Sale
AFAM
Rear Sprocket steel Sherco Enduro 50 Afam 53 teeth - 428
Article no.: AFAM201809

Rear Sprocket steel Sherco Enduro 50 Afam 53 teeth - 428

26,50 €
In stock
AFAM
Rear Sprocket steel Sherco Enduro 50 Afam 47 teeth - 428
Article no.: AFAM160817

Rear Sprocket steel Sherco Enduro 50 Afam 47 teeth - 428

25,00 €
In stock
AFAM
Rear Sprocket steel Peugeot / Rieju Afam 60 teeth - 420
Article no.: AFAM167819

Rear Sprocket steel Peugeot / Rieju Afam 60 teeth - 420

37,00 €
In stock
AFAM
Rear Sprocket steel Honda Monkey Z50 Afam 33 teeth - 420
Article no.: AFAM178952

Rear Sprocket steel Honda Monkey Z50 Afam 33 teeth - 420

16,50 €
In stock
IGM
Rear Sprocket steel Derbi DRD Pro 50 teeth - 420
Article no.: MF89.00334

Rear Sprocket steel Derbi DRD Pro 50 teeth - 420

19,00 €
In stock
AFAM
Rear Sprocket steel Beta RR 50 Afam 60 teeth - 420
Article no.: AFAM167786

Rear Sprocket steel Beta RR 50 Afam 60 teeth - 420

28,00 €
In stock
Standard Parts
Shift Drum with forks and bolts Generic / CPI / KSR
Article no.: MF60.19504

Shift Drum with forks and bolts Generic / CPI / KSR

65,00 €
In stock
Standard Parts
Gear Selector Shaft Generic / CPI / KSR
Article no.: MF60.19503

Gear Selector Shaft Generic / CPI / KSR

15,00 €
In stock
Str8
Chain Guard Rieju MRT
Article no.: STR-730.01

Chain Guard Rieju MRT

24,00 €
In stock
RRP
35,00 €
-31% Discount
Sale
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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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