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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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AFAM
Chain Kit Afam 13x48 Derbi Fenix
Article no.: AFAM70

Chain Kit Afam 13x48 Derbi Fenix

55,50 €
In stock
RRP
111,00 €
-50% Discount
Standard Parts
Chain Kit 13x53 - 420 Derbi DRD Pro / Racing
Article no.: MF89.00222

Chain Kit 13x53 - 420 Derbi DRD Pro / Racing

39,50 €
In stock
Standard Parts
Chain Kit 11x53 - 420 D.108mm 6 holes Derbi GPR / Senda X-Treme
Article no.: MF89.00211

Chain Kit 11x53 - 420 D.108mm 6 holes Derbi GPR / Senda X-Treme

41,00 €
In stock
Standard Parts
Rear Sprocket reinforced 53 teeth - 420 Derbi Aprilia SX 50
Article no.: MF89.00444

Rear Sprocket reinforced 53 teeth - 420 Derbi Aprilia SX 50

44,50 €
In stock
Standard Parts
Rear Sprocket reinforced 53 teeth - 420 Rieju MRT
Article no.: MF89.00424

Rear Sprocket reinforced 53 teeth - 420 Rieju MRT

46,00 €
In stock
Standard Parts
Rear Sprocket reinforced 52 teeth - 420 Rieju MRT
Article no.: MF89.00423

Rear Sprocket reinforced 52 teeth - 420 Rieju MRT

44,00 €
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

46,00 €
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
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 53 teeth - 420 blue Rieju MRT
Article no.: STR-701.53/BL

Rear Sprocket 53 teeth - 420 blue Rieju MRT

29,50 €
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 52 teeth - 420 Peugeot / Rieju
Article no.: MF89.00310

Rear Sprocket steel 52 teeth - 420 Peugeot / Rieju

22,50 €
In stock
IGM
Rear Sprocket steel 44 teeth - 420 IGM Rieju MRT
Article no.: IGM85140

Rear Sprocket steel 44 teeth - 420 IGM Rieju MRT

19,50 €
In stock
IGM
Rear Sprocket steel 46 teeth - 420 IGM Rieju MRT
Article no.: IGM5679

Rear Sprocket steel 46 teeth - 420 IGM Rieju MRT

14,00 €
In stock
Sale
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 12x52 - 420 Rieju MRT / Yamaha DT
Article no.: AFAM467442

Chain Kit AFAM 12x52 - 420 Rieju MRT / Yamaha DT

76,50 €
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
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

21,50 €
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 Guard Derbi Senda DRD Pro / X-Treme
Article no.: OE-DE00H01508181

Chain Guard Derbi Senda DRD Pro / X-Treme

39,00 €
In stock
Piaggio
Bleeder Tube gear box Piaggio / Vespa
Article no.: OE-PIACM162202

Bleeder Tube gear box Piaggio / Vespa

17,50 €
In stock
Polisport
Roller for chain tensioner Polisport d.42mm black
Article no.: EKP-143574

Roller for chain tensioner Polisport d.42mm black

14,00 €
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

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

56,00 €
In stock
Standard Parts
Sprocket Washer Zündapp 4-speed
Article no.: 31525

Sprocket Washer Zündapp 4-speed

0,40 €
In stock
RRP
0,80 €
-50% Discount
Standard Parts
Chain Pulley Set Aprilia / CPI / Derbi / Gilera
Article no.: 34935

Chain Pulley Set Aprilia / CPI / Derbi / Gilera

9,50 €
In stock
Standard Parts
Chain Tensioners (x2) Tomos A3 / A35
Article no.: 28790

Chain Tensioners (x2) Tomos A3 / A35

2,80 €
In stock
RRP
5,50 €
-49% Discount
Standard Parts
Rear Sprocket 53 teeth 420 Derbi DRD Pro
Article no.: 34937

Rear Sprocket 53 teeth 420 Derbi DRD Pro

25,00 €
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

28,00 €
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

35,00 €
In stock
Doppler
Primary Gears Doppler 15/50-13 (+20%) CPI / Keeway
Article no.: CGN493975

Primary Gears Doppler 15/50-13 (+20%) CPI / Keeway

79,00 €
In stock
Piaggio
Roller bearing / needle bearing (HK1516) Piaggio 125/150/180
Article no.: OE-PIA430228

Roller bearing / needle bearing (HK1516) Piaggio 125/150/180

5,70 €
In stock
RMS
Output Shaft type A, B, Piaggio old with nut, cap, split-pin
Article no.: R100240090

Output Shaft type A, B, Piaggio old with nut, cap, split-pin

41,00 €
In stock
Italjet
Intermediate shaft Italjet Formula
Article no.: OE-ITJ337100101

Intermediate shaft Italjet Formula

40,50 €
In stock
RRP
81,00 €
-50% Discount
Aprilia
Washer intermediate shaft Minarelli 14x29x1mm
Article no.: OE-AP8206195

Washer intermediate shaft Minarelli 14x29x1mm

4,00 €
In stock
4,60 €
-13% Discount
CPI
Primary gear shaft (clutch) CPI 13 teeth version 1
Article no.: OE-CPI20913

Primary gear shaft (clutch) CPI 13 teeth version 1

23,50 €
In stock
CPI
Intermediate gear shaft 13/52 China 2-stroke CPI Keeway
Article no.: OE-CPI20912

Intermediate gear shaft 13/52 China 2-stroke CPI Keeway

21,50 €
In stock
Standard Parts
Chain Master Link chain 428, reinforced, gold
Article no.: L-SA485376

Chain Master Link chain 428, reinforced, gold

3,00 €
In stock
AFAM
Chain Master Link reinforced Afam for chain 415
Article no.: L-SA485371

Chain Master Link reinforced Afam for chain 415

2,10 €
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

4,50 €
In stock
RMS
Driveshaft RMS Vespa PX / PXE 125 - 200cc
Article no.: R100240120

Driveshaft RMS Vespa PX / PXE 125 - 200cc

52,50 €
In stock
RRP
105,00 €
-50% Discount
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
Polini
Primary Gears Polini 14/39 Piaggio Zip LC after 2000
Article no.: P202.1407

Primary Gears Polini 14/39 Piaggio Zip LC after 2000

80,50 €
In stock
Derbi
Front Sprocket 11 teeth Derbi Euro 3 (D50B0)
Article no.: OE-DE86177R

Front Sprocket 11 teeth Derbi Euro 3 (D50B0)

16,50 €
In stock
Derbi
Gear Selector Shaft Derbi Euro 3 (D50B0)
Article no.: OE-DE847236

Gear Selector Shaft Derbi Euro 3 (D50B0)

107,00 €
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

48,00 €
In stock
Algi
Chain Tensioner 5x0.80mm MBK
Article no.: CGN8893

Chain Tensioner 5x0.80mm MBK

3,60 €
In stock
Algi
Chain Tensioner with locking nut Nylstop MBK
Article no.: CGN8892

Chain Tensioner with locking nut Nylstop MBK

3,70 €
In stock
Algi
Chain Tensioner Peugeot 103 / MVL / Vogue / SPX / RCX
Article no.: CGN8889
1

Chain Tensioner Peugeot 103 / MVL / Vogue / SPX / RCX

3,30 €
In stock
4,00 €
-18% Discount
Standard Parts
Pinion Circlip Peugeot 103 SPX / RCX d=13mm (1x)
Article no.: CGN485297

Pinion Circlip Peugeot 103 SPX / RCX d=13mm (1x)

1,90 €
In stock
Standard Parts
Chain Tensioner Peugeot Vogue / 103 / MVL
Article no.: CGN480894

Chain Tensioner Peugeot Vogue / 103 / MVL

5,60 €
In stock
Standard Parts
Rear Sprocket 54 teeth MBK 51S (Grimeca rims d.98mm)
Article no.: CGN2972
2

Rear Sprocket 54 teeth MBK 51S (Grimeca rims d.98mm)

15,50 €
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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