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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
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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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Doppler
Rear Sprocket steel 53 teeth - 428 Doppler Origin Beta RR
Article no.: CGN509882

Rear Sprocket steel 53 teeth - 428 Doppler Origin Beta RR

33,00 €
In stock
Moto Master
Bolts f. rear sprocket Moto Master M8x26 (x6)
Article no.: MMAST-24011074

Bolts f. rear sprocket Moto Master M8x26 (x6)

10,00 €
In stock
RRP
12,00 €
-17% Discount
Sale
Moto Master
Bolts f. rear sprocket Moto Master M8x30 (x6)
Article no.: MMAST-24011073

Bolts f. rear sprocket Moto Master M8x30 (x6)

10,00 €
In stock
RRP
12,00 €
-17% Discount
Sale
Top Performances
Secondary Gears 15/41 Top Performances Yamaha Aerox / BW's
Article no.: T9909520
7

Secondary Gears 15/41 Top Performances Yamaha Aerox / BW's

99,00 €
In stock
RRP
125,00 €
-21% Discount
Moto Master
Chain Moto Master X-Ring V6-520G 120 links (press links)
Article no.: MMAST-12231558

Chain Moto Master X-Ring V6-520G 120 links (press links)

83,00 €
In stock
RRP
106,00 €
-22% Discount
Sale
Moto Master
Chain Moto Master GP-520 GOLD 120 links (clip links)
Article no.: MMAST-12200451

Chain Moto Master GP-520 GOLD 120 links (clip links)

85,00 €
In stock
Moto Master
Chain Moto Master MX V2-520G 120 links (clip links)
Article no.: MMAST-12200449

Chain Moto Master MX V2-520G 120 links (clip links)

65,00 €
In stock
Sale
Moto Master
Front Sprocket Moto Master 428 14 teeth TC / SX 85 after 2018
Article no.: MMAST-12121570

Front Sprocket Moto Master 428 14 teeth TC / SX 85 after 2018

13,00 €
In stock
RRP
18,00 €
-28% Discount
Sale
Moto Master
Front Sprocket Moto Master 520 13 teeth GasGas / Rieju
Article no.: MMAST-12121538

Front Sprocket Moto Master 520 13 teeth GasGas / Rieju

13,00 €
In stock
RRP
18,00 €
-28% Discount
Sale
Moto Master
Front Sprocket Moto Master 520 13 teeth RM-Z 250 after 2013
Article no.: MMAST-12121527

Front Sprocket Moto Master 520 13 teeth RM-Z 250 after 2013

13,00 €
In stock
RRP
18,00 €
-28% Discount
Sale
Moto Master
Front Sprocket Moto Master 520 13 teeth RM 125 1981 - 2008
Article no.: MMAST-12121506

Front Sprocket Moto Master 520 13 teeth RM 125 1981 - 2008

5,80 €
In stock
RRP
15,50 €
-63% Discount
Moto Master
Front Sprocket Moto Master 520 13 teeth YZ 125 1987 - 2004
Article no.: MMAST-12121503

Front Sprocket Moto Master 520 13 teeth YZ 125 1987 - 2004

13,00 €
In stock
RRP
18,00 €
-28% Discount
Sale
Moto Master
Front Sprocket Moto Master 428 13 teeth TC / SX 85 2004-2017
Article no.: MMAST-12121490

Front Sprocket Moto Master 428 13 teeth TC / SX 85 2004-2017

13,00 €
In stock
RRP
18,00 €
-28% Discount
Sale
Moto Master
Front Sprocket Moto Master 428 12 teeth TC / SX 85
Article no.: MMAST-12121489

Front Sprocket Moto Master 428 12 teeth TC / SX 85

13,00 €
In stock
RRP
18,00 €
-28% Discount
Sale
Moto Master
Front Sprocket Moto Master 520 15 teeth KTM / Husqvarna / Beta / GasGas
Article no.: MMAST-12121485

Front Sprocket Moto Master 520 15 teeth KTM / Husqvarna / Beta / GasGas

13,00 €
In stock
RRP
18,00 €
-28% Discount
Sale
Moto Master
Front Sprocket Moto Master 520 14 teeth KTM / Husqvarna / Beta / GasGas
Article no.: MMAST-12121484

Front Sprocket Moto Master 520 14 teeth KTM / Husqvarna / Beta / GasGas

18,00 €
In stock
Moto Master
Front Sprocket Moto Master 520 13 teeth KTM / Husqvarna / Beta / GasGas
Article no.: MMAST-12121483

Front Sprocket Moto Master 520 13 teeth KTM / Husqvarna / Beta / GasGas

18,00 €
In stock
Moto Master
Front Sprocket Moto Master 520 15 teeth YZ 125 / 250
Article no.: MMAST-12121481

Front Sprocket Moto Master 520 15 teeth YZ 125 / 250

13,00 €
In stock
RRP
18,00 €
-28% Discount
Sale
Moto Master
Rear Sprocket Moto Master 420 aluminium 47 teeth black YZ 65
Article no.: MMAST-12112498

Rear Sprocket Moto Master 420 aluminium 47 teeth black YZ 65

22,00 €
In stock
RRP
48,50 €
-55% Discount
Moto Master
Rear Sprocket Moto Master 520 aluminium 49 teeth orange KTM Freeride
Article no.: MMAST-12112436

Rear Sprocket Moto Master 520 aluminium 49 teeth orange KTM Freeride

38,00 €
In stock
RRP
42,00 €
-10% Discount
Sale
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

42,00 €
In stock
RRP
50,00 €
-16% 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

42,00 €
In stock
RRP
50,00 €
-16% 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

38,00 €
In stock
RRP
50,00 €
-24% 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

38,00 €
In stock
RRP
50,00 €
-24% 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

62,00 €
In stock
RRP
80,00 €
-23% 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

38,00 €
In stock
RRP
50,00 €
-24% 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

38,00 €
In stock
RRP
50,00 €
-24% 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

36,00 €
In stock
RRP
50,00 €
-28% 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

38,00 €
In stock
RRP
50,00 €
-24% 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

38,00 €
In stock
RRP
50,00 €
-24% 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

59,00 €
In stock
RRP
70,00 €
-16% Discount
Sale
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

74,50 €
In stock
RRP
80,00 €
-7% Discount
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

38,00 €
In stock
RRP
50,00 €
-24% Discount
Sale
Moto Master
Rear Sprocket MotoMaster 520 aluminium 45 teeth black KTM / Husqvarna
Article no.: MMAST-12112198

Rear Sprocket MotoMaster 520 aluminium 45 teeth black KTM / Husqvarna

53,50 €
In stock
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

38,00 €
In stock
RRP
50,00 €
-24% Discount
Sale
Moto Master
Rear Sprocket Moto Master 520 aluminium 43 teeth black KTM / Husqvarna
Article no.: MMAST-12112196

Rear Sprocket Moto Master 520 aluminium 43 teeth black KTM / Husqvarna

52,00 €
In stock
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 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

38,00 €
In stock
RRP
50,00 €
-24% 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 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 45 teeth KTM Freeride
Article no.: MMAST-12102293

Rear Sprocket Moto Master 520 steel 45 teeth KTM Freeride

38,00 €
In stock
RRP
49,00 €
-22% 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

41,00 €
In stock
RRP
49,00 €
-16% 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

45,50 €
In stock
RRP
49,00 €
-7% Discount
Moto Master
Rear Sprocket Moto Master 520 steel 42 teeth YZ / YZF
Article no.: MMAST-12102261

Rear Sprocket Moto Master 520 steel 42 teeth YZ / YZF

44,50 €
In stock
45,00 €
-1% Discount
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

38,00 €
In stock
RRP
49,00 €
-22% 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

45,00 €
In stock
RRP
49,00 €
-8% Discount
Doppler
Chain Tensioner wheel axle 15mm Doppler Alu CNC red Derbi / Gilera / Aprilia
Article no.: CGN508644

Chain Tensioner wheel axle 15mm Doppler Alu CNC red Derbi / Gilera / Aprilia

23,00 €
In stock
26,50 €
-13% Discount
Doppler
Chain Tensioner wheel axle 15mm Doppler Alu CNC black Derbi / Gilera / Aprilia
Article no.: CGN508645

Chain Tensioner wheel axle 15mm Doppler Alu CNC black Derbi / Gilera / Aprilia

23,00 €
In stock
25,50 €
-10% Discount
Doppler
Chain Tensioner axle 15mm Doppler Alu CNC blue Derbi / Gilera / Aprilia
Article no.: CGN508647

Chain Tensioner axle 15mm Doppler Alu CNC blue Derbi / Gilera / Aprilia

23,00 €
In stock
26,00 €
-12% Discount
Doppler
Chain Tensioner wheel axle 12mm Doppler Alu CNC red Derbi / Gilera / Aprilia
Article no.: CGN508640

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

23,00 €
In stock
25,50 €
-10% Discount
Doppler
Chain Tensioner 12mm axle Doppler Alu CNC gold Derbi / Gilera / Aprilia
Article no.: CGN508642

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

19,00 €
In stock
26,00 €
-27% Discount
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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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