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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
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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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Moto Master
Rear Sprocket Moto Master 520 aluminium 50 teeth black KTM Freeride
Article no.: MMAST-12112431

Rear Sprocket Moto Master 520 aluminium 50 teeth black KTM Freeride

18,50 €
In stock
RRP
50,00 €
-63% Discount
Moto Master
Rear Sprocket Moto Master 520 aluminium 46 teeth black KTM Freeride
Article no.: MMAST-12112427

Rear Sprocket Moto Master 520 aluminium 46 teeth black KTM Freeride

43,00 €
In stock
RRP
50,00 €
-14% Discount
Sale
Moto Master
Rear Sprocket Moto Master 420 aluminium 48 teeth orange TC / SX 65
Article no.: MMAST-12112383

Rear Sprocket Moto Master 420 aluminium 48 teeth orange TC / SX 65

39,00 €
In stock
RRP
50,00 €
-22% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 Fusion 48 teeth Beta RR 350 black
Article no.: MMAST-12112349

Rear Sprocket Moto Master 520 Fusion 48 teeth Beta RR 350 black

27,50 €
In stock
RRP
73,50 €
-63% Discount
Moto Master
Rear Sprocket Moto Master 520 aluminium 48 teeth blue Sherco / Beta
Article no.: MMAST-12112344

Rear Sprocket Moto Master 520 aluminium 48 teeth blue Sherco / Beta

39,00 €
In stock
RRP
50,00 €
-22% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 aluminium 52 teeth black Sherco / Beta
Article no.: MMAST-12112332

Rear Sprocket Moto Master 520 aluminium 52 teeth black Sherco / Beta

39,00 €
In stock
RRP
50,00 €
-22% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 Fusion 49 teeth blue YZ / YZF
Article no.: MMAST-12112321

Rear Sprocket Moto Master 520 Fusion 49 teeth blue YZ / YZF

63,00 €
In stock
RRP
80,00 €
-21% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 Fusion 48 teeth black YZ / YZF
Article no.: MMAST-12112315

Rear Sprocket Moto Master 520 Fusion 48 teeth black YZ / YZF

27,50 €
In stock
RRP
73,50 €
-63% Discount
Moto Master
Rear Sprocket Moto Master 520 aluminium 44 teeth blue YZ / YZF
Article no.: MMAST-12112305

Rear Sprocket Moto Master 520 aluminium 44 teeth blue YZ / YZF

39,00 €
In stock
RRP
50,00 €
-22% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 aluminium 41 teeth blue YZ / YZF
Article no.: MMAST-12112302

Rear Sprocket Moto Master 520 aluminium 41 teeth blue YZ / YZF

39,00 €
In stock
RRP
50,00 €
-22% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 aluminium 53 teeth black YZ / YZF
Article no.: MMAST-12112301

Rear Sprocket Moto Master 520 aluminium 53 teeth black YZ / YZF

49,00 €
In stock
RRP
56,00 €
-13% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 aluminium 52 teeth black YZ / YZF
Article no.: MMAST-12112300

Rear Sprocket Moto Master 520 aluminium 52 teeth black YZ / YZF

39,00 €
In stock
RRP
50,00 €
-22% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 aluminium 50 teeth black YZ / YZF
Article no.: MMAST-12112298

Rear Sprocket Moto Master 520 aluminium 50 teeth black YZ / YZF

39,00 €
In stock
RRP
50,00 €
-22% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 aluminium 49 teeth black YZ / YZF
Article no.: MMAST-12112297

Rear Sprocket Moto Master 520 aluminium 49 teeth black YZ / YZF

39,00 €
In stock
RRP
50,00 €
-22% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 aluminium 47 teeth black YZ / YZF
Article no.: MMAST-12112295

Rear Sprocket Moto Master 520 aluminium 47 teeth black YZ / YZF

39,00 €
In stock
RRP
50,00 €
-22% Discount
Sale
Moto Master
Rear Sprocket Moto Master 428 Fusion 47 teeth black TC / SX 85
Article no.: MMAST-12112275

Rear Sprocket Moto Master 428 Fusion 47 teeth black TC / SX 85

60,00 €
In stock
RRP
70,00 €
-14% Discount
Sale
Moto Master
Rear Sprocket Moto Master 428 aluminium 49 teeth black TC / SX 85
Article no.: MMAST-12112257

Rear Sprocket Moto Master 428 aluminium 49 teeth black TC / SX 85

20,00 €
In stock
RRP
54,00 €
-63% Discount
Moto Master
Rear Sprocket Moto Master 520 Fusion 51 teeth black KTM / Husqvarna
Article no.: MMAST-12112241

Rear Sprocket Moto Master 520 Fusion 51 teeth black KTM / Husqvarna

63,00 €
In stock
RRP
80,00 €
-21% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 aluminium 46 teeth orange KTM / Husqvarna
Article no.: MMAST-12112229

Rear Sprocket Moto Master 520 aluminium 46 teeth orange KTM / Husqvarna

20,00 €
In stock
RRP
54,00 €
-63% Discount
Moto Master
Rear Sprocket Moto Master 520 aluminium 44 teeth orange KTM / Husqvarna
Article no.: MMAST-12112227

Rear Sprocket Moto Master 520 aluminium 44 teeth orange KTM / Husqvarna

20,00 €
In stock
RRP
54,00 €
-63% Discount
Moto Master
Rear Sprocket Moto Master 520 aluminium 45 teeth blue KTM / Husqvarna
Article no.: MMAST-12112213

Rear Sprocket Moto Master 520 aluminium 45 teeth blue KTM / Husqvarna

42,00 €
In stock
RRP
50,00 €
-16% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 aluminium 44 teeth black KTM / Husqvarna
Article no.: MMAST-12112197

Rear Sprocket Moto Master 520 aluminium 44 teeth black KTM / Husqvarna

39,00 €
In stock
RRP
50,00 €
-22% Discount
Sale
Moto Master
Rear Sprocket Moto Master 420 aluminium 51 teeth black KX 85
Article no.: MMAST-12112188

Rear Sprocket Moto Master 420 aluminium 51 teeth black KX 85

20,00 €
In stock
RRP
54,00 €
-63% Discount
Moto Master
Rear Sprocket Moto Master 428 aluminium 54 teeth blue RM 85 / YZ 85
Article no.: MMAST-12112155

Rear Sprocket Moto Master 428 aluminium 54 teeth blue RM 85 / YZ 85

19,50 €
In stock
RRP
51,00 €
-62% Discount
Moto Master
Rear Sprocket Moto Master 520 aluminium 47 teeth black CR / CRF
Article no.: MMAST-12112090

Rear Sprocket Moto Master 520 aluminium 47 teeth black CR / CRF

20,00 €
In stock
RRP
54,00 €
-63% Discount
Moto Master
Rear Sprocket Moto Master 520 aluminium 46 teeth black CR / CRF
Article no.: MMAST-12112089

Rear Sprocket Moto Master 520 aluminium 46 teeth black CR / CRF

39,00 €
In stock
RRP
50,00 €
-22% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 aluminium 45 teeth black RM 125 / 250
Article no.: MMAST-12112063

Rear Sprocket Moto Master 520 aluminium 45 teeth black RM 125 / 250

20,00 €
In stock
RRP
54,00 €
-63% Discount
Moto Master
Rear Sprocket Moto Master 520 steel 53 teeth Husqvarna CR / WR & Sherco
Article no.: MMAST-12102317

Rear Sprocket Moto Master 520 steel 53 teeth Husqvarna CR / WR & Sherco

17,50 €
In stock
RRP
47,50 €
-63% Discount
Moto Master
Rear Sprocket Moto Master 520 steel 50 teeth CR / CRF
Article no.: MMAST-12102310

Rear Sprocket Moto Master 520 steel 50 teeth CR / CRF

22,00 €
In stock
RRP
40,50 €
-46% Discount
Moto Master
Rear Sprocket Moto Master 520 steel 49 teeth Husqvarna / KTM
Article no.: MMAST-12102308

Rear Sprocket Moto Master 520 steel 49 teeth Husqvarna / KTM

24,00 €
In stock
RRP
40,50 €
-41% Discount
Moto Master
Rear Sprocket Moto Master 520 steel 45 teeth KTM Freeride
Article no.: MMAST-12102293

Rear Sprocket Moto Master 520 steel 45 teeth KTM Freeride

39,00 €
In stock
RRP
49,00 €
-20% Discount
Sale
Moto Master
Rear Sprocket Moto Master 420 steel 49 teeth TC / SX 65
Article no.: MMAST-12102284

Rear Sprocket Moto Master 420 steel 49 teeth TC / SX 65

39,00 €
In stock
RRP
49,00 €
-20% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 steel 44 teeth YZ / YZF
Article no.: MMAST-12102263

Rear Sprocket Moto Master 520 steel 44 teeth YZ / YZF

39,00 €
In stock
RRP
49,00 €
-20% Discount
Sale
Moto Master
Rear Sprocket Moto Master 428 steel 45 teeth TC /SX 85
Article no.: MMAST-12102253

Rear Sprocket Moto Master 428 steel 45 teeth TC /SX 85

17,50 €
In stock
RRP
45,00 €
-61% Discount
Moto Master
Rear Sprocket Moto Master 520 steel 51 teeth KX /KXF
Article no.: MMAST-12102251

Rear Sprocket Moto Master 520 steel 51 teeth KX /KXF

39,00 €
In stock
RRP
49,00 €
-20% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 steel 50 teeth KX /KXF
Article no.: MMAST-12102250

Rear Sprocket Moto Master 520 steel 50 teeth KX /KXF

23,50 €
In stock
RRP
45,00 €
-48% Discount
Moto Master
Rear Sprocket Moto Master 428 steel 53 teeth RM / YZ 85
Article no.: MMAST-12102239

Rear Sprocket Moto Master 428 steel 53 teeth RM / YZ 85

17,50 €
In stock
RRP
45,00 €
-61% Discount
Moto Master
Rear Sprocket Moto Master 520 steel 51 teeth RM / RM-Z
Article no.: MMAST-12102229

Rear Sprocket Moto Master 520 steel 51 teeth RM / RM-Z

39,00 €
In stock
RRP
49,00 €
-20% Discount
Sale
Doppler
Chain Tensioner wheel axle 12mm Doppler Alu CNC black Derbi / Gilera / Aprilia
Article no.: CGN508641

Chain Tensioner wheel axle 12mm Doppler Alu CNC black Derbi / Gilera / Aprilia

23,00 €
In stock
Sale
Doppler
Front Sprocket Doppler - 428 Neochrome Minarelli AM6
Article no.: CGN428NEOAM6

Front Sprocket Doppler - 428 Neochrome Minarelli AM6

11,00 €
In stock
Doppler
Front Sprocket Doppler - 420 Neochrome Minarelli AM6
Article no.: CGN420NEOAM6

Front Sprocket Doppler - 420 Neochrome Minarelli AM6

from 11,00 €
In stock
Doppler
Front Sprocket Doppler - 420 Neochrome Derbi
Article no.: CGN420NEODERBI

Front Sprocket Doppler - 420 Neochrome Derbi

from 11,00 €
In stock
Doppler
Front Sprocket Doppler - 420 Black coating Minarelli AM6
Article no.: CGN420NOIRAM6

Front Sprocket Doppler - 420 Black coating Minarelli AM6

from 11,00 €
In stock
Doppler
Front Sprocket Doppler - 420 Black coating Derbi
Article no.: CGN420NOIRDERBI

Front Sprocket Doppler - 420 Black coating Derbi

from 11,00 €
In stock
Doppler
Rear Sprocket 53 teeth - 428 Doppler black steel Sherco Enduro 50
Article no.: CGN509881

Rear Sprocket 53 teeth - 428 Doppler black steel Sherco Enduro 50

29,00 €
In stock
Sale
Malossi
Secondary Transmission Malossi 17/37 Piaggio X9 250cc
Article no.: M679983

Secondary Transmission Malossi 17/37 Piaggio X9 250cc

37,50 €
In stock
RRP
101,00 €
-63% Discount
Malossi
Secondary Transmission Malossi 17/41 Honda Pantheon 125-150cc
Article no.: M6711060

Secondary Transmission Malossi 17/41 Honda Pantheon 125-150cc

40,50 €
In stock
RRP
109,00 €
-63% Discount
Polini
Secondary Gears Polini 14/48 Piaggio NRG after 1998
Article no.: P202.1404

Secondary Gears Polini 14/48 Piaggio NRG after 1998

89,00 €
In stock
RRP
98,00 €
-9% Discount
Sale
Hot Rods
Repair Kit gearbox output shaft Hot Rods Yamaha WRF 450 / YZF 450
Article no.: HR-OSK0040

Repair Kit gearbox output shaft Hot Rods Yamaha WRF 450 / YZF 450

9,80 €
In stock
RRP
25,50 €
-62% Discount
AFAM
Rear Sprocket 52 teeth - 420 Afam Aprilia SX 50
Article no.: A264720

Rear Sprocket 52 teeth - 420 Afam Aprilia SX 50

27,00 €
In stock
Buzzetti
Woodruff Key clutch basket Buzzetti 10x3x3mm APE / Vespa
Article no.: WB-30423

Woodruff Key clutch basket Buzzetti 10x3x3mm APE / Vespa

1,80 €
In stock
Doppler
Primary Gears Doppler 13/43 Yamaha Aerox / BW's
Article no.: CGN283937
4

Primary Gears Doppler 13/43 Yamaha Aerox / BW's

79,00 €
In stock
Renthal
Chain 520 R1 Works 120 links
Article no.: REN-R1520120

Chain 520 R1 Works 120 links

83,00 €
In stock
Sale
Renthal
Chain Master Link R1 415
Article no.: REN-12250550

Chain Master Link R1 415

0,80 €
In stock
RRP
2,10 €
-62% Discount
Renthal
Chain Master Link R3-3 520
Article no.: REN-12250467

Chain Master Link R3-3 520

5,00 €
In stock
Renthal
Chain R3-3 520 Off Road 118 links
Article no.: REN-12240205

Chain R3-3 520 Off Road 118 links

108,00 €
In stock
Sale
Renthal
Front Sprocket Renthal 520 Z.13 self-cleaning Kawasaki KX 125
Article no.: REN-R33752013

Front Sprocket Renthal 520 Z.13 self-cleaning Kawasaki KX 125

8,00 €
In stock
RRP
21,50 €
-63% Discount
Renthal
Front Sprocket Renthal 520 Z.15 self-cleaning Kawasaki YZ 250 / YZF 450
Article no.: REN-R28952015

Front Sprocket Renthal 520 Z.15 self-cleaning Kawasaki YZ 250 / YZF 450

19,00 €
In stock
Sale
Renthal
Front Sprocket Renthal 428 Z.14 self-cleaning YZ 85
Article no.: REN-R25742814

Front Sprocket Renthal 428 Z.14 self-cleaning YZ 85

18,00 €
In stock
Sale
Renthal
Front Sprocket Renthal 520 Z.13 self-cleaning RM 250 / DR-Z 400
Article no.: REN-R25552013

Front Sprocket Renthal 520 Z.13 self-cleaning RM 250 / DR-Z 400

22,00 €
In stock
Sale
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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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