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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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UFO
Swingarm Slider Honda CRF 150 after 2007 UFO black
Article no.: UF-HO04627#001

Swingarm Slider Honda CRF 150 after 2007 UFO black

18,00 €
In stock
Sale
UFO
Swingarm Slider Honda CR 125 / 250 1999-2004 UFO black
Article no.: UF-HO03660#001

Swingarm Slider Honda CR 125 / 250 1999-2004 UFO black

19,00 €
In stock
UFO
Chain Slider / Swingarm Slider Set Honda CR 125 / 250 1995-1997 UFO black
Article no.: UF-HO02675#001

Chain Slider / Swingarm Slider Set Honda CR 125 / 250 1995-1997 UFO black

18,50 €
In stock
UFO
Swingarm Slider Yamaha YZ 125 / 250 1993-2001 UFO black
Article no.: UF-YA03809#001

Swingarm Slider Yamaha YZ 125 / 250 1993-2001 UFO black

15,00 €
In stock
Sale
UFO
Swingarm Slider Honda CR 125 / 250 1990-1994 UFO black
Article no.: UF-HO02632#001

Swingarm Slider Honda CR 125 / 250 1990-1994 UFO black

17,00 €
In stock
UFO
Chain Slider / Swingarm Slider GasGas MC / EC 2021-2023 UFO black
Article no.: UF-GG07135@001

Chain Slider / Swingarm Slider GasGas MC / EC 2021-2023 UFO black

27,00 €
In stock
Sale
Polini
Secondary Gears Polini Z=11-46 Piaggio Ciao / Si
Article no.: P202.1427

Secondary Gears Polini Z=11-46 Piaggio Ciao / Si

100,00 €
In stock
RRP
118,00 €
-15% Discount
Sale
Polini
Secondary Gears Polini Z=10-47 Piaggio Ciao / Si
Article no.: P202.1426

Secondary Gears Polini Z=10-47 Piaggio Ciao / Si

102,00 €
In stock
RRP
118,00 €
-14% Discount
Sale
Polini
Primary Gears Polini Z=11-23 Piaggio Ciao / Si
Article no.: P202.1425

Primary Gears Polini Z=11-23 Piaggio Ciao / Si

73,50 €
In stock
RRP
84,00 €
-13% Discount
Polini
Wheel Axle Revision Kit Polini Piaggio Zip
Article no.: P202.1422

Wheel Axle Revision Kit Polini Piaggio Zip

18,00 €
In stock
RRP
20,00 €
-10% Discount
Doppler
Chain Guide Doppler Derbi / Aprilia / Gilera Neochrome
Article no.: CGN520884

Chain Guide Doppler Derbi / Aprilia / Gilera Neochrome

31,00 €
In stock
Sale
Doppler
Rear Sprocket Doppler 53 teeth - 428 aluminum blue Sherco 50
Article no.: CGN517734

Rear Sprocket Doppler 53 teeth - 428 aluminum blue Sherco 50

69,50 €
In stock
Polisport
Swingarm Slider Polisport Beta RR after 2020 black
Article no.: POL-8476200001

Swingarm Slider Polisport Beta RR after 2020 black

12,00 €
In stock
RRP
19,73 €
-39% Discount
Sale
Standard Parts
Screw M8x35 galvanized 8.8 (x10)
Article no.: SP-10265

Screw M8x35 galvanized 8.8 (x10)

2,10 €
In stock
Standard Parts
Rear Sprocket IGM Rieju SMX "06 62mm 5 hole 50 teeth
Article no.: SP-87870

Rear Sprocket IGM Rieju SMX "06 62mm 5 hole 50 teeth

15,00 €
In stock
AFAM
Chain Master Link clip for motocross chain AFAM A420MX2G
Article no.: AFAMARA420MX2-G

Chain Master Link clip for motocross chain AFAM A420MX2G

4,20 €
In stock
AFAM
Chain motocross AFAM A420MX2G - clip
Article no.: AFAMA420MX2-G

Chain motocross AFAM A420MX2G - clip

from 34,50 €
In stock
50,00 €
-31% Discount
AFAM
Chain motocross AFAM A520MR2G - clip
Article no.: AFAMA520MR2-G

Chain motocross AFAM A520MR2G - clip

from 44,00 €
In stock
45,50 €
-3% Discount
AFAM
Chain motocross AFAM A520XRR3G X-Ring - clip
Article no.: AFAMA520XRR3-G

Chain motocross AFAM A520XRR3G X-Ring - clip

from 93,00 €
In stock
116,00 €
-20% Discount
Standard Parts
Rear Sprocket Premium 66 teeth - 420 black Fantic XM50 /XE50 after 2018
Article no.: IP49519

Rear Sprocket Premium 66 teeth - 420 black Fantic XM50 /XE50 after 2018

48,50 €
In stock
RFX
Chain Tensioners / Axle Blocks RFX Pro yellow Suzuki RM-Z 250 / 450
Article no.: R-FXAB3010099YL

Chain Tensioners / Axle Blocks RFX Pro yellow Suzuki RM-Z 250 / 450

12,00 €
In stock
RRP
31,50 €
-62% Discount
RFX
Chain Roller RFX Race black 34mm KTM 125-525
Article no.: R-FXCR5010055BK

Chain Roller RFX Race black 34mm KTM 125-525

9,70 €
In stock
RFX
Chain Roller RFX Race black 38mm universal
Article no.: R-FXCR1003855BK

Chain Roller RFX Race black 38mm universal

9,00 €
In stock
Sale
RFX
Chain Tensioners / Axle Blocks RFX Pro orange KTM SX65
Article no.: R-FXAB5040099OR

Chain Tensioners / Axle Blocks RFX Pro orange KTM SX65

36,00 €
In stock
RFX
Chain Tensioners / Axle Blocks RFX Pro orange KTM
Article no.: R-FXAB5030099OR

Chain Tensioners / Axle Blocks RFX Pro orange KTM

37,00 €
In stock
Standard Parts
Chain type 25H 136 links Pocket Bike Pista
Article no.: SP-23358

Chain type 25H 136 links Pocket Bike Pista

7,60 €
In stock
RMS
Freewheel Sprocket 18 teeth Piaggio Ciao
Article no.: R525260140

Freewheel Sprocket 18 teeth Piaggio Ciao

5,00 €
In stock
RMS
Freewheel Sprocket 16 teeth Piaggio Ciao
Article no.: R525260120

Freewheel Sprocket 16 teeth Piaggio Ciao

5,10 €
In stock
Standard Parts
Steering Lock with 2 keys Puch
Article no.: IP44179

Steering Lock with 2 keys Puch

10,50 €
In stock
Standard Parts
Rear Sprocket Premium 45 teeth Puch Maxi (cast wheel)
Article no.: IP43680

Rear Sprocket Premium 45 teeth Puch Maxi (cast wheel)

13,50 €
In stock
RRP
35,50 €
-62% Discount
Standard Parts
Pedal Chain 112 links 1/2 "x1/8" Type 410 moped
Article no.: IP44150

Pedal Chain 112 links 1/2 "x1/8" Type 410 moped

6,50 €
In stock
Voca Racing
Gearbox Voca Racing Derbi
Article no.: VCR-RD77193.CC

Gearbox Voca Racing Derbi

522,00 €
In stock
RRP
570,00 €
-8% Discount
Voca Racing
Gearbox Voca Racing Minarelli AM6
Article no.: VCR-RD77188.CC

Gearbox Voca Racing Minarelli AM6

456,00 €
In stock
RRP
534,00 €
-15% Discount
Avoc
Chain Tensioners (x2) Avoc Orange KTM Duke 125
Article no.: AVOC-181854

Chain Tensioners (x2) Avoc Orange KTM Duke 125

14,00 €
In stock
Sale
Standard Parts
Chain Tensioner M7x1.00 - L.35mm MBK 51 (x1)
Article no.: CGN517091

Chain Tensioner M7x1.00 - L.35mm MBK 51 (x1)

4,10 €
In stock
KRM
Ceramic Ball for clutch rod KRM Minarelli AM6
Article no.: KR540F

Ceramic Ball for clutch rod KRM Minarelli AM6

6,90 €
In stock
Polini
Secondary Transmission Polini 14/48 17,7mm Piaggio
Article no.: P202.1373

Secondary Transmission Polini 14/48 17,7mm Piaggio

163,00 €
In stock
RRP
228,00 €
-29% Discount
Pro Circuit
Chain Tensioners / Axle Blocks Pro Circuit red CR / CRF 2000-2008
Article no.: PC-HAB00

Chain Tensioners / Axle Blocks Pro Circuit red CR / CRF 2000-2008

29,00 €
In stock
RRP
77,00 €
-62% Discount
Derbi
Chain Tensioner Plate (x1) Derbi DRD Racing
Article no.: OE-DE00H01301471

Chain Tensioner Plate (x1) Derbi DRD Racing

23,50 €
In stock
Algi
Rear Sprocket Screw M6x1.00 - L.20mm Peugeot 103 (alloy wheels)
Article no.: EKP-17129

Rear Sprocket Screw M6x1.00 - L.20mm Peugeot 103 (alloy wheels)

1,30 €
In stock
Doppler
Rear Sprocket 68 teeth Doppler aluminium CNC black MBK 51 / Peugeot 103
Article no.: CGN513527

Rear Sprocket 68 teeth Doppler aluminium CNC black MBK 51 / Peugeot 103

52,00 €
In stock
Doppler
Rear Sprocket steel 53 teeth - 420 Doppler Derbi DRD Pro
Article no.: CGN509884

Rear Sprocket steel 53 teeth - 420 Doppler Derbi DRD Pro

29,00 €
In stock
Sale
Doppler
Rear Sprocket steel 53 teeth - 428 Doppler Origin Beta RR
Article no.: CGN509882

Rear Sprocket steel 53 teeth - 428 Doppler Origin Beta RR

30,00 €
In stock
Sale
Moto Master
Bolts f. rear sprocket Moto Master M8x26 (x6)
Article no.: MMAST-24011074

Bolts f. rear sprocket Moto Master M8x26 (x6)

11,00 €
In stock
RRP
12,00 €
-8% Discount
Sale
Moto Master
Bolts f. rear sprocket Moto Master M8x30 (x6)
Article no.: MMAST-24011073

Bolts f. rear sprocket Moto Master M8x30 (x6)

11,00 €
In stock
RRP
12,00 €
-8% 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

85,00 €
In stock
RRP
125,00 €
-32% Discount
Sale
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)

84,00 €
In stock
RRP
106,00 €
-21% Discount
Sale
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)

75,00 €
In stock
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

14,00 €
In stock
RRP
18,00 €
-22% 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

14,00 €
In stock
RRP
18,00 €
-22% 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

14,00 €
In stock
RRP
18,00 €
-22% 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

14,00 €
In stock
RRP
18,00 €
-22% 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

14,00 €
In stock
RRP
18,00 €
-22% 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

14,00 €
In stock
RRP
18,00 €
-22% 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

14,00 €
In stock
RRP
18,00 €
-22% Discount
Sale
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

14,00 €
In stock
RRP
18,00 €
-22% Discount
Sale
Moto Master
Front Sprocket Moto Master 520 12 teeth YZ 125 / 250
Article no.: MMAST-12121478

Front Sprocket Moto Master 520 12 teeth YZ 125 / 250

5,80 €
In stock
RRP
15,50 €
-63% Discount
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

39,00 €
In stock
RRP
42,00 €
-7% Discount
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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