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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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UFO
Swingarm Slider KTM SX 85 after 2015 UFO black
Article no.: UF-KT04056#001

Swingarm Slider KTM SX 85 after 2015 UFO black

14,00 €
In stock
16,00 €
-13% Discount
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

16,50 €
In stock
17,00 €
-3% Discount
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

30,50 €
In stock
Polini
Secondary Gears Polini Z=11-46 Piaggio Ciao / Si
Article no.: P202.1427

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

104,00 €
In stock
RRP
122,00 €
-15% Discount
Polini
Secondary Gears Polini Z=10-47 Piaggio Ciao / Si
Article no.: P202.1426

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

105,00 €
In stock
RRP
122,00 €
-14% Discount
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
86,00 €
-15% 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 Kit Doppler 13x53 - 428 Sherco 50 Alu Blue
Article no.: CGN526753

Chain Kit Doppler 13x53 - 428 Sherco 50 Alu Blue

95,00 €
In stock
102,00 €
-7% Discount
Doppler
Chain Guide Doppler Derbi / Aprilia / Gilera Neochrome
Article no.: CGN520884

Chain Guide Doppler Derbi / Aprilia / Gilera Neochrome

30,00 €
In stock
Doppler
Rear Sprocket Doppler 53 teeth - 428 aluminum black Sherco 50
Article no.: CGN517733

Rear Sprocket Doppler 53 teeth - 428 aluminum black Sherco 50

55,00 €
In stock
69,50 €
-21% Discount
Doppler
Rear Sprocket Doppler 53 teeth - 428 aluminum blue Sherco 50
Article no.: CGN517734

Rear Sprocket Doppler 53 teeth - 428 aluminum blue Sherco 50

55,00 €
In stock
69,50 €
-21% Discount
Doppler
Rear Sprocket steel 53Z - 420 Doppler Origin Peugeot / Rieju
Article no.: CGN509888

Rear Sprocket steel 53Z - 420 Doppler Origin Peugeot / Rieju

30,00 €
In stock
34,00 €
-12% Discount
Polisport
Swingarm Slider Polisport Beta RR after 2020 black
Article no.: POL-8476200001

Swingarm Slider Polisport Beta RR after 2020 black

11,00 €
In stock
RRP
19,73 €
-44% 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 17,00 €
In stock
50,00 €
-66% Discount
AFAM
Chain Master Link clip AFAM ARS A428MX-G gold
Article no.: AFAMARSA428MX-G

Chain Master Link clip AFAM ARS A428MX-G gold

5,70 €
In stock
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 95,00 €
In stock
106,00 €
-10% 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
Standard Parts
Rear Sprocket Premium 60 teeth - 420 black Fantic XM50 /XE50 after 2018
Article no.: IP49518

Rear Sprocket Premium 60 teeth - 420 black Fantic XM50 /XE50 after 2018

42,50 €
In stock
Standard Parts
Rear Sprocket Premium 58 teeth - 420 black Fantic XM50 / XE50 after 2018
Article no.: IP49517

Rear Sprocket Premium 58 teeth - 420 black Fantic XM50 / XE50 after 2018

45,00 €
In stock
Standard Parts
Rear Sprocket 53 teeth - 420 Doppler Masai Rider 50
Article no.: CGN517184

Rear Sprocket 53 teeth - 420 Doppler Masai Rider 50

57,00 €
In stock
Standard Parts
Chain reinforced 134 links D.420 Doppler purple
Article no.: CGN517760

Chain reinforced 134 links D.420 Doppler purple

31,00 €
In stock
Standard Parts
Moped Chain 112 links
Article no.: CGN509804

Moped Chain 112 links

8,40 €
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 green 38mm Kawasaki KXF 250 / 450
Article no.: R-FXCR2010055GN

Chain Roller RFX Race green 38mm Kawasaki KXF 250 / 450

12,00 €
In stock
RFX
Chain Roller RFX Race black 38mm universal
Article no.: R-FXCR1003855BK

Chain Roller RFX Race black 38mm universal

10,00 €
In stock
Sale
RFX
Chain Roller RFX Race black 32mm universal
Article no.: R-FXCR1003255BK

Chain Roller RFX Race black 32mm universal

11,00 €
In stock
RFX
Chain Tensioners / Axle Blocks RFX Pro orange KTM SX65
Article no.: R-FXAB5040099OR

Chain Tensioners / Axle Blocks RFX Pro orange KTM SX65

32,00 €
In stock
36,00 €
-11% Discount
Sale
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
Standard Parts
Spacer idle gear 24x35x1,0mm gearbox Simson
Article no.: MOF-41496

Spacer idle gear 24x35x1,0mm gearbox Simson

1,20 €
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

12,00 €
In stock
Sale
Doppler
Rear Sprocket 53 teeth - 420 Doppler aluminium CNC red Fantic Caballero before 2015
Article no.: CGN515220

Rear Sprocket 53 teeth - 420 Doppler aluminium CNC red Fantic Caballero before 2015

46,00 €
In stock
53,50 €
-14% Discount
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
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

20,00 €
In stock
Sale
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

50,00 €
In stock
52,00 €
-4% Discount
Doppler
Plate f. rear sprocket Doppler aluminium black Peugeot 103
Article no.: CGN512883

Plate f. rear sprocket Doppler aluminium black Peugeot 103

40,00 €
In stock
58,50 €
-32% Discount
Conti
Rear Sprocket bi-metal red 53 teeth - 420 Conti CHR Aprilia SX 50
Article no.: CGN513622

Rear Sprocket bi-metal red 53 teeth - 420 Conti CHR Aprilia SX 50

68,00 €
In stock
Conti
Rear Sprocket bimetal red 53 teeth - 428 Conti CHR Beta RR
Article no.: CGN513620

Rear Sprocket bimetal red 53 teeth - 428 Conti CHR Beta RR

45,00 €
In stock
67,50 €
-33% Discount
Sale
AFAM
Chain Kit Afam 11x58 - 420 Fantic Caballero 2006 - 2017
Article no.: CGN509298

Chain Kit Afam 11x58 - 420 Fantic Caballero 2006 - 2017

73,00 €
In stock
74,00 €
-1% Discount
Standard Parts
Rear Sprocket steel 52 teeth - 420 CPI SX / SM
Article no.: MF89.00371

Rear Sprocket steel 52 teeth - 420 CPI SX / SM

25,00 €
In stock
Doppler
Rear Sprocket steel 53 teeth - 420 Doppler Rieju MRT
Article no.: CGN509885

Rear Sprocket steel 53 teeth - 420 Doppler Rieju MRT

30,00 €
In stock
34,50 €
-13% Discount
Doppler
Rear Sprocket steel 53 teeth - 420 Doppler Derbi DRD Pro
Article no.: CGN509884

Rear Sprocket steel 53 teeth - 420 Doppler Derbi DRD Pro

27,00 €
In stock
RRP
30,00 €
-10% Discount
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

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
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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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