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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 Needle bearing Oil seal kit 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
Reinforced Chain 134 links size=420
Article no.: CGN475169

Reinforced Chain 134 links size=420

20,00 €
In stock
21,00 €
-5% Discount
Piaggio
Bleeder Tube gear box Piaggio / Vespa
Article no.: OE-PIACM162202

Bleeder Tube gear box Piaggio / Vespa

20,00 €
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

52,00 €
In stock
RRP
60,00 €
-13% Discount
Sale
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

55,00 €
In stock
64,50 €
-15% Discount
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

46,00 €
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

46,00 €
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

46,00 €
In stock
56,00 €
-18% Discount
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)

1,00 €
In stock
RRP
2,10 €
-52% Discount
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

9,40 €
In stock
Standard Parts
Chain Tensioners (x2) Tomos A3 / A35
Article no.: 28790

Chain Tensioners (x2) Tomos A3 / A35

2,10 €
In stock
RRP
5,50 €
-62% Discount
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
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

25,00 €
In stock
Sale
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
Doppler
Primary Gears Doppler 15/50-13 (+20%) CPI / Keeway
Article no.: CGN493975

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

78,00 €
In stock
RRP
89,00 €
-12% Discount
Sale
Piaggio
Roller bearing / needle bearing (HK1516) Piaggio 125/150/180
Article no.: OE-PIA430228

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

5,80 €
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

38,50 €
In stock
Polini
Primary Gears Polini Piaggio Zip / Vespa ET2 after 2000
Article no.: P202.1392
1

Primary Gears Polini Piaggio Zip / Vespa ET2 after 2000

85,00 €
In stock
RRP
100,00 €
-15% Discount
Italjet
Intermediate shaft Italjet Formula 38/11
Article no.: OE-ITJ337100101

Intermediate shaft Italjet Formula 38/11

29,50 €
In stock
RRP
81,00 €
-64% Discount
GY6
Gear input shaft (clutch) - GY6 50cc 139QMB
Article no.: OE-GY6BT13868

Gear input shaft (clutch) - GY6 50cc 139QMB

12,50 €
In stock
Aprilia
Washer intermediate shaft Minarelli 14x29x1mm
Article no.: OE-AP8206195

Washer intermediate shaft Minarelli 14x29x1mm

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

Primary gear shaft (clutch) CPI 13 teeth version 1

20,00 €
In stock
23,50 €
-15% Discount
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

20,00 €
In stock
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
Doppler
Chain Kit aluminium gold 13x53 - 420 Doppler Rieju MRT
Article no.: CGN491213
5

Chain Kit aluminium gold 13x53 - 420 Doppler Rieju MRT

89,00 €
In stock
99,00 €
-10% Discount
Polini
Primary Gears Polini 15/38 2.53 / +22.9% Vespa ET2 98 / LX 50cc
Article no.: P202.1405

Primary Gears Polini 15/38 2.53 / +22.9% Vespa ET2 98 / LX 50cc

85,00 €
In stock
RRP
100,00 €
-15% 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

67,00 €
In stock
67,50 €
-1% Discount
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

89,00 €
In stock
RRP
100,00 €
-11% Discount
Derbi
Front Sprocket 11 teeth Derbi Euro 3 (D50B0)
Article no.: OE-DE86177R

Front Sprocket 11 teeth Derbi Euro 3 (D50B0)

13,00 €
In stock
15,00 €
-13% Discount
Sale
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
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

3,40 €
In stock
3,70 €
-8% Discount
Algi
Chain Tensioner Peugeot 103 / MVL / Vogue / SPX / RCX
Article no.: CGN8889
1

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

3,40 €
In stock
Standard Parts
Pinion Circlip Peugeot 103 SPX / RCX 13mm
Article no.: CGN485297

Pinion Circlip Peugeot 103 SPX / RCX 13mm

1,70 €
In stock
1,90 €
-11% Discount
Standard Parts
Chain Tensioner Peugeot Vogue / 103 / MVL
Article no.: CGN480894

Chain Tensioner Peugeot Vogue / 103 / MVL

5,70 €
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)

16,50 €
In stock
Standard Parts
Rear Sprocket 56 teeth Peugeot 103 SP / MV (RYS rims d.94mm)
Article no.: CGN2936
1

Rear Sprocket 56 teeth Peugeot 103 SP / MV (RYS rims d.94mm)

16,00 €
In stock
Standard Parts
Rear Sprocket 54 teeth MBK 68 / 88 / 89 (d.110mm)
Article no.: CGN2963

Rear Sprocket 54 teeth MBK 68 / 88 / 89 (d.110mm)

15,50 €
In stock
Standard Parts
Rear Sprocket 52 teeth Peugeot 103 SP / MV (d.94mm)
Article no.: CGN2935
1

Rear Sprocket 52 teeth Peugeot 103 SP / MV (d.94mm)

15,00 €
In stock
Standard Parts
Chain Tensioner Piaggio Ciao PX / Bravo
Article no.: CGN3223

Chain Tensioner Piaggio Ciao PX / Bravo

7,00 €
In stock
11,50 €
-39% Discount
Sale
Standard Parts
Rear Sprocket 44 teeth MBK 40 / 50 (d.94mm)
Article no.: CGN2957

Rear Sprocket 44 teeth MBK 40 / 50 (d.94mm)

15,50 €
In stock
Standard Parts
Rear Sprocket 56 teeth Peugeot 103 SPX / RCX (Grimeca 98mm)
Article no.: CGN2954

Rear Sprocket 56 teeth Peugeot 103 SPX / RCX (Grimeca 98mm)

20,50 €
In stock
Standard Parts
Rear Sprocket 48 teeth Peugeot 103 SP / MV (d.94mm)
Article no.: CGN2934

Rear Sprocket 48 teeth Peugeot 103 SP / MV (d.94mm)

18,00 €
In stock
Standard Parts
Rear Sprocket 54 teeth Peugeot 103 SPX / RCX (Grimeca 98mm)
Article no.: CGN2953

Rear Sprocket 54 teeth Peugeot 103 SPX / RCX (Grimeca 98mm)

16,00 €
In stock
Standard Parts
Rear Sprocket 45 teeth Peugeot 103 SP / MV (d.94mm)
Article no.: CGN2933

Rear Sprocket 45 teeth Peugeot 103 SP / MV (d.94mm)

13,50 €
In stock
Standard Parts
Rear Sprocket 45 teeth Peugeot 103 SPX / RCX (Grimeca 98mm)
Article no.: CGN2949

Rear Sprocket 45 teeth Peugeot 103 SPX / RCX (Grimeca 98mm)

13,50 €
In stock
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)

18,00 €
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)

17,00 €
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)

17,00 €
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)

12,00 €
In stock
Standard Parts
Rear Sprocket 60 teeth Peugeot 103 SPX / RCX (Grimeca 98mm)
Article no.: CGN175202
1

Rear Sprocket 60 teeth Peugeot 103 SPX / RCX (Grimeca 98mm)

25,00 €
In stock
Doppler
Primary Gears Doppler 15-50 Minarelli
Article no.: CGN263894
1

Primary Gears Doppler 15-50 Minarelli

70,50 €
In stock
RRP
75,00 €
-6% Discount
Doppler
Primary Gears Doppler 14-42 Minarelli
Article no.: CGN263880
1

Primary Gears Doppler 14-42 Minarelli

73,00 €
In stock
RRP
79,00 €
-8% 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
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

24,00 €
In stock
RRP
77,00 €
-69% Discount
Standard Parts
Rear Sprocket 48 teeth - 420 Peugeot / Rieju
Article no.: CGN484142
1

Rear Sprocket 48 teeth - 420 Peugeot / Rieju

21,50 €
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

4,80 €
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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