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Transmission

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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
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
Rear Sprocket BTS 56 teeth Peugeot 103 SP / MVL (94mm steel rims)
Article no.: CGN2945
1

Rear Sprocket BTS 56 teeth Peugeot 103 SP / MVL (94mm steel rims)

17,00 €
In stock
Standard Parts
Rear Sprocket BTS 54 teeth Peugeot 103 SP / MVL (steel rims 94mm)
Article no.: CGN2944

Rear Sprocket BTS 54 teeth Peugeot 103 SP / MVL (steel rims 94mm)

17,50 €
In stock
Standard Parts
Rear Sprocket BTS 50 teeth Peugeot 103 SP / MVL (steel rims 94mm)
Article no.: CGN2942

Rear Sprocket BTS 50 teeth Peugeot 103 SP / MVL (steel rims 94mm)

15,00 €
In stock
Standard Parts
Rear Sprocket 42 teeth Peugeot 103 SP / MV (RYS rims d.94mm)
Article no.: CGN244069

Rear Sprocket 42 teeth Peugeot 103 SP / MV (RYS rims d.94mm)

10,50 €
In stock
Doppler
Secondary Gears 14-41 Doppler Yamaha Aerox / BW's
Article no.: CGN279301
2

Secondary Gears 14-41 Doppler Yamaha Aerox / BW's

65,00 €
In stock
69,50 €
-6% Discount
Sale
Doppler
Primary Gears Doppler 15-50 Yamaha Aerox / BW's
Article no.: CGN263894
1

Primary Gears Doppler 15-50 Yamaha Aerox / BW's

69,00 €
In stock
Doppler
Primary Gears Doppler 14-42 Yamaha Aerox / BW's
Article no.: CGN263880
1

Primary Gears Doppler 14-42 Yamaha Aerox / BW's

69,00 €
In stock
Polini
Primary Transmission Polini 14/37 Kymco Dink / Grand Dink 150cc
Article no.: P202.1386

Primary Transmission Polini 14/37 Kymco Dink / Grand Dink 150cc

32,00 €
In stock
RRP
62,50 €
-49% Discount
Standard Parts
Rear Sprocket 48 teeth - 420 Peugeot / Rieju
Article no.: CGN484142
1

Rear Sprocket 48 teeth - 420 Peugeot / Rieju

23,00 €
In stock
23,50 €
-2% Discount
Standard Parts
Chain Master Link Iris Racing super reinforced d=415
Article no.: CGN8872
1

Chain Master Link Iris Racing super reinforced d=415

4,50 €
In stock
Standard Parts
Chain Master Link Iris standard d=415
Article no.: CGN8869

Chain Master Link Iris standard d=415

2,10 €
In stock
Standard Parts
Gear 12 teeth Peugeot 103 SPX / RCX
Article no.: CGN862

Gear 12 teeth Peugeot 103 SPX / RCX

5,50 €
In stock
Standard Parts
Gear 10 teeth Peugeot 103 SPX / RCX
Article no.: CGN860

Gear 10 teeth Peugeot 103 SPX / RCX

8,30 €
In stock
Standard Parts
Gear 13 teeth Peugeot 103 SP / MVL / Vogue
Article no.: CGN858

Gear 13 teeth Peugeot 103 SP / MVL / Vogue

8,10 €
In stock
Standard Parts
Gear 12 teeth Peugeot 103 SP / MVL / Vogue
Article no.: CGN857
1

Gear 12 teeth Peugeot 103 SP / MVL / Vogue

5,00 €
In stock
5,70 €
-12% Discount
Sale
Standard Parts
Gear 11 teeth Peugeot 103 SP / MVL / Vogue
Article no.: CGN855

Gear 11 teeth Peugeot 103 SP / MVL / Vogue

5,80 €
In stock
Standard Parts
Pedal Shaft Peugeot 103 SP / MV / Vogue
Article no.: CGN702
1

Pedal Shaft Peugeot 103 SP / MV / Vogue

12,50 €
In stock
Standard Parts
Pedal Spacer Ring MBK 51
Article no.: CGN4277

Pedal Spacer Ring MBK 51

2,60 €
In stock
Standard Parts
Pedal Shaft MBK 51 / 41
Article no.: CGN4272

Pedal Shaft MBK 51 / 41

14,50 €
In stock
Standard Parts
Pinion 13 teeth MBK 51
Article no.: CGN4261

Pinion 13 teeth MBK 51

10,00 €
In stock
Standard Parts
Rear Sprocket 48 teeth MBK 51 (Grimeca rim)
Article no.: CGN2970

Rear Sprocket 48 teeth MBK 51 (Grimeca rim)

14,50 €
In stock
Standard Parts
Rear Sprocket 48 teeth Peugeot 103 SP / SPX (Grimeca rim)
Article no.: CGN2951
1

Rear Sprocket 48 teeth Peugeot 103 SP / SPX (Grimeca rim)

13,50 €
In stock
AFAM
Chain Kit AFAM 11x60 Yamaha TZR after 2003
Article no.: CGN478546
2

Chain Kit AFAM 11x60 Yamaha TZR after 2003

59,00 €
In stock
AFAM
Chain Kit AFAM 14x53 Derbi Senda X-treme
Article no.: CGN467429
4

Chain Kit AFAM 14x53 Derbi Senda X-treme

55,00 €
In stock
64,50 €
-15% Discount
Standard Parts
Roller for Chain Tensioner size=32mm inner diameter 8mm
Article no.: CGN440593
3

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

10,00 €
In stock
Top Performances
Secondary Gears 16/41 Top Performances Minarelli / Aerox
Article no.: T990875P
1

Secondary Gears 16/41 Top Performances Minarelli / Aerox

121,00 €
In stock
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

101,00 €
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)

23,00 €
In stock
RRP
45,50 €
-49% Discount
AFAM
Chain Kit AFAM reinforced 14x53 - 420 Derbi Senda DRD after 2002
Article no.: CGN467432
3

Chain Kit AFAM reinforced 14x53 - 420 Derbi Senda DRD after 2002

64,50 €
In stock
Iris
Chain Iris standard 106 links size 415
Article no.: CGN3037
3

Chain Iris standard 106 links size 415

8,80 €
In stock
Iris
Chain Iris standard 120 links size 415
Article no.: CGN3038
2

Chain Iris standard 120 links size 415

12,00 €
In stock
12,50 €
-4% Discount
Sale
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

16,00 €
In stock
Iris
Chain Iris reinforced 106 links size 415 gold
Article no.: CGN3039
1

Chain Iris reinforced 106 links size 415 gold

15,00 €
In stock
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

23,00 €
In stock
26,50 €
-13% Discount
Sale
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

92,50 €
In stock
Standard Parts
Chain Tensioner
Article no.: A170700

Chain Tensioner

3,90 €
In stock
4,00 €
-3% Discount
Standard Parts
Chain Guard Derbi Senda aluminum black
Article no.: SP-214473

Chain Guard Derbi Senda aluminum black

26,00 €
In stock
AFAM
Chain Kit Afam 13x53 Aprilia / Derbi / Gilera
Article no.: AFAM173010

Chain Kit Afam 13x53 Aprilia / Derbi / Gilera

65,00 €
In stock
Doppler
Sprocket Holder Doppler Open Peugeot 103 Leuleu
Article no.: CGN533899

Sprocket Holder Doppler Open Peugeot 103 Leuleu

61,00 €
In stock
Doppler
Sprocket Holder Doppler Open MBK 88
Article no.: CGN533898

Sprocket Holder Doppler Open MBK 88

61,00 €
In stock
Doppler
Sprocket Aluminum 56 Teeth for sprocket holder Doppler Open
Article no.: CGN533894

Sprocket Aluminum 56 Teeth for sprocket holder Doppler Open

49,50 €
In stock
Doppler
Sprocket Aluminum 52 Teeth for sprocket holder Doppler Open
Article no.: CGN533893

Sprocket Aluminum 52 Teeth for sprocket holder Doppler Open

60,50 €
In stock
KMC
Chain KMC 106 links - 415 black
Article no.: SP-0629

Chain KMC 106 links - 415 black

10,00 €
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

42,00 €
In stock
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

42,50 €
In stock
Top Performances
Secondary Gears 13/42 Top Performances Minarelli
Article no.: TCI07452

Secondary Gears 13/42 Top Performances Minarelli

53,00 €
In stock
59,00 €
-10% Discount
Sale
Doppler
Chain Guide Doppler Derbi / Aprilia / Gilera purple
Article no.: CGN533906

Chain Guide Doppler Derbi / Aprilia / Gilera purple

34,00 €
In stock
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 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

9,50 €
In stock
Standard Parts
Chain Guard reinforced Derbi Senda / Aprilia SX / Gilera SMT black
Article no.: STR-730.10/BK

Chain Guard reinforced Derbi Senda / Aprilia SX / Gilera SMT 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

9,90 €
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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