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Transmission

(601 products)
50cc Bike Gearboxes Chains and Sprockets Gear Drives Transmission Accessories
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Chain Chain guard Chain guide Chain kit Chain master link Chain roller Chain slider Chain tensioner Clutch accessories Clutch gear Clutch kit Fairing Front sprocket Gearbox Gearbox accessories Gearbox bearing kit Chain rear sprocket Transmission accessories Transmission gear Bearing ball Cable guide Gear selector shaft Sprocket screws
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

42,00 €
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
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
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 steel 50 teeth - 420 Aprilia SX 50
Article no.: MF89.00342

Rear Sprocket steel 50 teeth - 420 Aprilia SX 50

32,50 €
In stock
35,50 €
-8% Discount
Standard Parts
Rear Sprocket steel 48 teeth - 420 Aprilia SX 50
Article no.: MF89.00341

Rear Sprocket steel 48 teeth - 420 Aprilia SX 50

30,50 €
In stock
33,50 €
-9% Discount
Standard Parts
Rear Sprocket steel 52 teeth - 420 Peugeot / Rieju
Article no.: MF89.00310

Rear Sprocket steel 52 teeth - 420 Peugeot / Rieju

21,00 €
In stock
IGM
Rear Sprocket steel 44 teeth - 420 IGM Rieju MRT
Article no.: IGM85140

Rear Sprocket steel 44 teeth - 420 IGM Rieju MRT

12,00 €
In stock
19,50 €
-38% Discount
Sale
IGM
Rear Sprocket steel 46 teeth - 420 IGM Rieju MRT
Article no.: IGM5679

Rear Sprocket steel 46 teeth - 420 IGM Rieju MRT

15,50 €
In stock
IGM
Rear Sprocket steel 65 teeth - 420 IGM Rieju MRT
Article no.: IGM13101205

Rear Sprocket steel 65 teeth - 420 IGM Rieju MRT

18,00 €
In stock
Standard Parts
Chain Tensioner complete Motor Hispania Furia Cross
Article no.: SP-0016057

Chain Tensioner complete Motor Hispania Furia Cross

15,50 €
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

8,40 €
In stock
Standard Parts
Reinforced Chain 134 links size=420
Article no.: CGN475169

Reinforced Chain 134 links size=420

20,00 €
In stock
21,00 €
-5% Discount
Derbi
Chain Tensioner (x1) Derbi DRD Racing
Article no.: OE-DE00H01304811

Chain Tensioner (x1) Derbi DRD Racing

43,00 €
In stock
Derbi
Chain Guard Derbi Senda DRD Pro / X-Treme
Article no.: OE-DE00H01508181

Chain Guard Derbi Senda DRD Pro / X-Treme

38,50 €
In stock
Polisport
Roller for chain tensioner Polisport d.42mm black
Article no.: EKP-143574

Roller for chain tensioner Polisport d.42mm black

16,00 €
In stock
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

55,50 €
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

47,00 €
In stock
54,50 €
-14% Discount
Sale
Standard Parts
Chain Pulley Set Aprilia / CPI / Derbi / Gilera
Article no.: 34935

Chain Pulley Set Aprilia / CPI / Derbi / Gilera

9,40 €
In stock
Standard Parts
Rear Sprocket 53 teeth 420 Derbi DRD Pro
Article no.: 34937

Rear Sprocket 53 teeth 420 Derbi DRD Pro

23,50 €
In stock
24,50 €
-4% Discount
Rieju
Gear Shift Shaft original spare part Rieju RS2
Article no.: OE-RIE2407000

Gear Shift Shaft original spare part Rieju RS2

6,50 €
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

26,50 €
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

30,50 €
In stock
35,00 €
-13% Discount
Standard Parts
Chain Master Link chain 428, reinforced, gold
Article no.: L-SA485376

Chain Master Link chain 428, reinforced, gold

2,90 €
In stock
AFAM
Chain Master Link reinforced Afam for chain 415
Article no.: L-SA485371

Chain Master Link reinforced Afam for chain 415

2,00 €
In stock
Standard Parts
Sprocket Retainer Plate 11 teeth Derbi Euro 2 / Euro 3
Article no.: CGN490398

Sprocket Retainer Plate 11 teeth Derbi Euro 2 / Euro 3

3,90 €
In stock
4,50 €
-13% Discount
Derbi
Front Sprocket 11 teeth Derbi Euro 3 (D50B0)
Article no.: OE-DE86177R

Front Sprocket 11 teeth Derbi Euro 3 (D50B0)

16,00 €
In stock
Derbi
Gear Selector Shaft Derbi Euro 3 (D50B0)
Article no.: OE-DE847236

Gear Selector Shaft Derbi Euro 3 (D50B0)

103,00 €
In stock
Standard Parts
Chain Kit 12x53 - 420 d=108mm 6 holes Derbi Senda SM / DRD
Article no.: CGN486688
1

Chain Kit 12x53 - 420 d=108mm 6 holes Derbi Senda SM / DRD

43,50 €
In stock
48,00 €
-9% Discount
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

21,50 €
In stock
23,50 €
-9% 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

4,80 €
In stock
Standard Parts
Chain Master Link Iris standard d=415
Article no.: CGN8869

Chain Master Link Iris standard d=415

2,00 €
In stock
AFAM
Chain Kit AFAM 14x53 Derbi Senda X-treme
Article no.: CGN467429
4

Chain Kit AFAM 14x53 Derbi Senda X-treme

53,00 €
In stock
64,50 €
-18% 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
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)

20,00 €
In stock
RRP
45,50 €
-56% 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

58,50 €
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

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

27,00 €
In stock
Top Performances
Gear Shift Cam Top Performances
Article no.: T9920020
4

Gear Shift Cam Top Performances

87,00 €
In stock
Standard Parts
Chain Guard Derbi Senda aluminum black
Article no.: SP-214473

Chain Guard Derbi Senda aluminum black

22,50 €
In stock
26,00 €
-13% Discount
AFAM
Chain Kit Afam 13x53 Aprilia / Derbi / Gilera
Article no.: AFAM173010

Chain Kit Afam 13x53 Aprilia / Derbi / Gilera

64,50 €
In stock
65,00 €
-1% Discount
Str8
Chain Tensioner STR8 Sherco 50 Gold (x2)
Article no.: STR-740.05/OR

Chain Tensioner STR8 Sherco 50 Gold (x2)

20,00 €
In stock
New
Str8
Chain Tensioner STR8 Sherco 50 Purple (x2)
Article no.: STR-740.05/PU

Chain Tensioner STR8 Sherco 50 Purple (x2)

20,00 €
In stock
New
Str8
Chain Tensioner STR8 Sherco 50 Blue (x2)
Article no.: STR-740.05/BL

Chain Tensioner STR8 Sherco 50 Blue (x2)

20,00 €
In stock
New
Str8
Chain Tensioner STR8 Beta RR 50 Gold (x2)
Article no.: STR-740.04/OR

Chain Tensioner STR8 Beta RR 50 Gold (x2)

20,00 €
In stock
New
Str8
Chain Tensioner STR8 Beta RR 50 Purple (x2)
Article no.: STR-740.04/PU

Chain Tensioner STR8 Beta RR 50 Purple (x2)

20,00 €
In stock
New
Str8
Chain Tensioner STR8 Beta RR 50 Red (x2)
Article no.: STR-740.04/RE

Chain Tensioner STR8 Beta RR 50 Red (x2)

20,00 €
In stock
New
Str8
Chain Tensioner STR8 Beta RR 50 Blue (x2)
Article no.: STR-740.04/BL

Chain Tensioner STR8 Beta RR 50 Blue (x2)

20,00 €
In stock
New
Str8
Chain Tensioner STR8 Rieju MRT Gold (x2)
Article no.: STR-740.03/OR

Chain Tensioner STR8 Rieju MRT Gold (x2)

20,00 €
In stock
New
Str8
Chain Tensioner STR8 Rieju MRT Purple (x2)
Article no.: STR-740.03/PU

Chain Tensioner STR8 Rieju MRT Purple (x2)

20,00 €
In stock
New
Str8
Chain Tensioner STR8 Rieju MRT Red (x2)
Article no.: STR-740.03/RE

Chain Tensioner STR8 Rieju MRT Red (x2)

20,00 €
In stock
New
Str8
Chain Tensioner STR8 Derbi 15mm Gold (x2)
Article no.: STR-740.02/OR

Chain Tensioner STR8 Derbi 15mm Gold (x2)

20,00 €
In stock
Str8
Chain Tensioner STR8 Derbi 15mm Purple (x2)
Article no.: STR-740.02/PU

Chain Tensioner STR8 Derbi 15mm Purple (x2)

20,00 €
In stock
Str8
Chain Tensioner STR8 Derbi 15mm Red (x2)
Article no.: STR-740.02/RE

Chain Tensioner STR8 Derbi 15mm Red (x2)

20,00 €
In stock
Str8
Chain Tensioner STR8 Derbi 15mm Blue (x2)
Article no.: STR-740.02/BL

Chain Tensioner STR8 Derbi 15mm Blue (x2)

20,00 €
In stock
Str8
Chain Tensioner STR8 Derbi 12mm Gold (x2)
Article no.: STR-740.01/OR

Chain Tensioner STR8 Derbi 12mm Gold (x2)

20,00 €
In stock
New
Str8
Chain Tensioner STR8 Derbi 12mm Purple (x2)
Article no.: STR-740.01/PU

Chain Tensioner STR8 Derbi 12mm Purple (x2)

20,00 €
In stock
New
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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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