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Transmission

(602 products)
50cc Bike Gearboxes Chains and Sprockets Gear Drives Transmission Accessories
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Product type
Chain Chain accessories Chain guard Chain guide Chain kit Chain master link Chain roller Chain slider Chain tensioner Clutch accessories Clutch kit Crankshaft accessories Fairing Front sprocket Gearbox Gearbox accessories Gearbox bearing kit Kickstarter accessories Chain rear sprocket Screws other Transmission accessories Transmission gear
Brand
AFAM Avoc Beta Conti Derbi Doppler IGM Jasil KRM Moose Racing MotoForce MotoForce Racing Piaggio Polisport Rieju Stage6 Standard Parts STR8 Top Performances Voca Racing Yamaha
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Standard Parts
Rear Sprocket reinforced 52 teeth - 420 Rieju MRT
Article no.: MF89.00423

Rear Sprocket reinforced 52 teeth - 420 Rieju MRT

40,50 €
In stock
Standard Parts
Rear Sprocket reinforced 62 teeth - 420 Derbi DRD Pro
Article no.: MF89.00435

Rear Sprocket reinforced 62 teeth - 420 Derbi DRD Pro

44,00 €
In stock
Standard Parts
Rear Sprocket reinforced 53 teeth - 420 Derbi DRD Pro
Article no.: MF89.00432

Rear Sprocket reinforced 53 teeth - 420 Derbi DRD Pro

40,50 €
In stock
Standard Parts
Rear Sprocket steel 71 teeth - 420 Rieju MRT
Article no.: MF89.00329

Rear Sprocket steel 71 teeth - 420 Rieju MRT

29,00 €
In stock
Standard Parts
Rear Sprocket steel 62 teeth - 420 Rieju MRT
Article no.: MF89.00328

Rear Sprocket steel 62 teeth - 420 Rieju MRT

30,00 €
In stock
Str8
Front Sprocket 420 red Derbi
Article no.: STR-71REDDERBI

Front Sprocket 420 red Derbi

10,50 €
In stock
Standard Parts
Front Sprocket 420 red Minarelli AM6
Article no.: STR-71REDAM6

Front Sprocket 420 red Minarelli AM6

from 10,50 €
In stock
Str8
Front Sprocket 420 orange Minarelli AM6
Article no.: STR-71ORANGEAM6

Front Sprocket 420 orange Minarelli AM6

from 9,10 €
In stock
Standard Parts
Front Sprocket 420 blue Derbi
Article no.: STR-71BLUEDERBI

Front Sprocket 420 blue Derbi

10,50 €
In stock
Str8
Front Sprocket 420 blue Minarelli AM6
Article no.: STR-71BLUEAM6

Front Sprocket 420 blue Minarelli AM6

from 8,80 €
In stock
Standard Parts
Rear Sprocket 53 teeth - 420 orange Rieju MRT
Article no.: STR-701.53/OR

Rear Sprocket 53 teeth - 420 orange Rieju MRT

28,50 €
In stock
Standard Parts
Rear Sprocket 53 teeth - 420 blue Rieju MRT
Article no.: STR-701.53/BL

Rear Sprocket 53 teeth - 420 blue Rieju MRT

28,50 €
In stock
Standard Parts
Rear Sprocket steel 52 teeth - 420 Sherco Enduro 50
Article no.: MF89.00365

Rear Sprocket steel 52 teeth - 420 Sherco Enduro 50

25,50 €
In stock
Standard Parts
Rear Sprocket steel 53 teeth - 420 Aprilia SX 50
Article no.: MF89.00344
1

Rear Sprocket steel 53 teeth - 420 Aprilia SX 50

25,00 €
In stock
Standard Parts
Rear Sprocket steel 50 teeth - 420 Aprilia SX 50
Article no.: MF89.00342

Rear Sprocket steel 50 teeth - 420 Aprilia SX 50

35,50 €
In stock
Standard Parts
Rear Sprocket steel 48 teeth - 420 Aprilia SX 50
Article no.: MF89.00341

Rear Sprocket steel 48 teeth - 420 Aprilia SX 50

33,50 €
In stock
Standard Parts
Rear Sprocket steel 53 teeth - 420 Rieju MRT
Article no.: MF89.00324

Rear Sprocket steel 53 teeth - 420 Rieju MRT

22,50 €
In stock
Standard Parts
Rear Sprocket steel 52 teeth - 420 Peugeot / Rieju
Article no.: MF89.00310

Rear Sprocket steel 52 teeth - 420 Peugeot / Rieju

24,00 €
In stock
IGM
Rear Sprocket steel 46 teeth - 428 IGM Rieju MRT
Article no.: IGM87871

Rear Sprocket steel 46 teeth - 428 IGM Rieju MRT

19,50 €
In stock
IGM
Rear Sprocket steel 50 teeth - 420 IGM Rieju MRT
Article no.: IGM5681

Rear Sprocket steel 50 teeth - 420 IGM Rieju MRT

22,50 €
In stock
IGM
Rear Sprocket steel 46 teeth - 420 IGM Rieju MRT
Article no.: IGM5679

Rear Sprocket steel 46 teeth - 420 IGM Rieju MRT

20,50 €
In stock
IGM
Rear Sprocket steel 65 teeth - 420 IGM Rieju MRT
Article no.: IGM13101205

Rear Sprocket steel 65 teeth - 420 IGM Rieju MRT

17,00 €
In stock
AFAM
Chain Kit AFAM 12x51 - 420 Beta RR after 2005
Article no.: AFAM500353

Chain Kit AFAM 12x51 - 420 Beta RR after 2005

57,50 €
In stock
Standard Parts
Chain Tensioner complete Motor Hispania Furia Cross
Article no.: SP-0016057

Chain Tensioner complete Motor Hispania Furia Cross

13,50 €
In stock
Top Performances
Top Performances Kickstart Shaft Top Performances Minarelli AM6
Article no.: TAM00030
1

Top Performances Kickstart Shaft Top Performances Minarelli AM6

49,00 €
In stock
Standard Parts
Front Sprocket 13 teeth 420 Derbi Euro2 before 1999
Article no.: L-SA3692

Front Sprocket 13 teeth 420 Derbi Euro2 before 1999

8,00 €
In stock
Standard Parts
Reinforced Chain 134 links size=420
Article no.: CGN475169

Reinforced Chain 134 links size=420

21,00 €
In stock
Derbi
Chain Tensioner (x1) Derbi DRD Racing
Article no.: OE-DE00H01304811

Chain Tensioner (x1) Derbi DRD Racing

49,50 €
In stock
Derbi
Chain Tensioner Derbi Senda DRD X-Treme after 2010
Article no.: OE-DE00H01305171

Chain Tensioner Derbi Senda DRD X-Treme after 2010

16,50 €
In stock
Standard Parts
Gearbox / Gear Drive OEM quality Minarelli AM6
Article no.: EKP-138731

Gearbox / Gear Drive OEM quality Minarelli AM6

177,00 €
In stock
Doppler
Rear Sprocket 53 teeth / 428 chain Doppler CNC aluminium red Beta RR
Article no.: CGN496464
1

Rear Sprocket 53 teeth / 428 chain Doppler CNC aluminium red Beta RR

54,50 €
In stock
Doppler
Rear Sprocket 53 teeth - 428 Doppler aluminium CNC red Sherco Enduro 50
Article no.: CGN496462
2

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

50,00 €
In stock
58,00 €
-14% Discount
Sale
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC red Aprilia SX 50
Article no.: CGN492590

Rear Sprocket 53 teeth - 420 Doppler aluminium CNC red Aprilia SX 50

54,50 €
In stock
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC red Rieju MRT
Article no.: CGN491212

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

54,50 €
In stock
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC gold Rieju MRT
Article no.: CGN491209

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

54,50 €
In stock
Standard Parts
Sprocket Retainer Plate Derbi D50B0 after 2006 (24mm hole spacing)
Article no.: 34426
1

Sprocket Retainer Plate Derbi D50B0 after 2006 (24mm hole spacing)

2,40 €
In stock
Rieju
Gear Shift Shaft original spare part Rieju RS2
Article no.: OE-RIE2407000

Gear Shift Shaft original spare part Rieju RS2

6,80 €
In stock
AFAM
Rear Sprocket AFAM 51 teeth - 420 Beta RR / Caballero
Article no.: CGN495148
1

Rear Sprocket AFAM 51 teeth - 420 Beta RR / Caballero

32,50 €
In stock
AFAM
Rear Sprocket 56 teeth - 428 Afam 6 holes d.110mm Sherco Enduro 50
Article no.: CGN495147

Rear Sprocket 56 teeth - 428 Afam 6 holes d.110mm Sherco Enduro 50

27,00 €
In stock
29,00 €
-7% Discount
Sale
Rieju
Chain Tensioner OEM quality Rieju 50
Article no.: EKP-126742

Chain Tensioner OEM quality Rieju 50

13,50 €
In stock
AFAM
Chain Master Link reinforced Afam for chain 415
Article no.: L-SA485371

Chain Master Link reinforced Afam for chain 415

2,30 €
In stock
Standard Parts
Retainer Plate for sprocket 11 teeth special Derbi Euro 2 / Euro 3
Article no.: CGN490398

Retainer Plate for sprocket 11 teeth special Derbi Euro 2 / Euro 3

4,50 €
In stock
AFAM
Chain Kit AFAM 12x50 428 Beta 50 RR Factory 2005 - 2013
Article no.: CGN490504

Chain Kit AFAM 12x50 428 Beta 50 RR Factory 2005 - 2013

67,50 €
In stock
Derbi
Front Sprocket 11 teeth Derbi Euro 3 (D50B0)
Article no.: OE-DE86177R

Front Sprocket 11 teeth Derbi Euro 3 (D50B0)

14,00 €
In stock
Derbi
Gear Selector Shaft Derbi Euro 3 (D50B0)
Article no.: OE-DE847236

Gear Selector Shaft Derbi Euro 3 (D50B0)

97,00 €
In stock
Derbi
Lever for gear selector shaft Derbi Euro 3 (D50B0)
Article no.: OE-DE847068
1

Lever for gear selector shaft Derbi Euro 3 (D50B0)

15,50 €
In stock
Standard Parts
Retaining Plate f. sprocket Derbi Euro 2 / Euro 3
Article no.: CGN484861
2

Retaining Plate f. sprocket Derbi Euro 2 / Euro 3

4,50 €
In stock
Standard Parts
Rear Sprocket 48 teeth - 420 Peugeot / Rieju
Article no.: CGN484142
1

Rear Sprocket 48 teeth - 420 Peugeot / Rieju

23,50 €
In stock
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

2,30 €
In stock
AFAM
Chain Kit AFAM 12x53 Aprilia RS/RX/RS4 2006 - 2010
Article no.: CGN482389
3

Chain Kit AFAM 12x53 Aprilia RS/RX/RS4 2006 - 2010

62,00 €
In stock
67,00 €
-7% Discount
Sale
AFAM
Chain Kit AFAM 11x60 Yamaha TZR after 2003
Article no.: CGN478546
2

Chain Kit AFAM 11x60 Yamaha TZR after 2003

54,00 €
In stock
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
Standard Parts
Gearbox Minarelli AM6 1st series
Article no.: CGN370101
1

Gearbox Minarelli AM6 1st series

87,00 €
In stock
RRP
127,00 €
-31% Discount
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

64,50 €
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

52,00 €
In stock
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
Top Performances
Gear Shift Cam Top Performances
Article no.: T9920020
4

Gear Shift Cam Top Performances

86,00 €
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
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11

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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