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Axle other Chain Chain accessories Chain guard Chain guide Chain kit Chain master link Chain roller Chain slider Chain tensioner Chassis screws Circlip Clutch accessories Clutch kit Crankshaft accessories CVT sliders Engine case accessories 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 Screw kit Screws other Tank accessories Transmission Transmission accessories Transmission gear Washer Wheel axle Woodruff key
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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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AFAM
Rear Sprocket steel 52 teeth - 420 Afam Peugeot / Rieju
Article no.: AFAM92122-52

Rear Sprocket steel 52 teeth - 420 Afam Peugeot / Rieju

25,50 €
In stock
AFAM
Rear Sprocket steel 52 teeth - 420 Afam Rieju MRT
Article no.: AFAM47103-52

Rear Sprocket steel 52 teeth - 420 Afam Rieju MRT

20,00 €
In stock
AFAM
Rear Sprocket steel 51 teeth - 420 AFAM Beta RR
Article no.: AFAM38101-51

Rear Sprocket steel 51 teeth - 420 AFAM Beta RR

20,50 €
In stock
AFAM
Rear Sprocket steel 50 teeth - 420 Afam Rieju MRT
Article no.: AFAM47103-50

Rear Sprocket steel 50 teeth - 420 Afam Rieju MRT

19,00 €
In stock
AFAM
Rear Sprocket steel 50 teeth - 420 AFAM Beta RR
Article no.: AFAM38101-50

Rear Sprocket steel 50 teeth - 420 AFAM Beta RR

20,00 €
In stock
AFAM
Rear Sprocket steel 50 teeth - 420 AFAM Beta RR (02 - 05) / Caballero
Article no.: AFAM92115-50

Rear Sprocket steel 50 teeth - 420 AFAM Beta RR (02 - 05) / Caballero

23,50 €
In stock
AFAM
Rear Sprocket steel 49 teeth - 428 Afam Yamaha TZR
Article no.: AFAM12202-49

Rear Sprocket steel 49 teeth - 428 Afam Yamaha TZR

24,50 €
In stock
AFAM
Rear Sprocket steel 48 teeth - 428 AFAM Yamaha MT 125 / YS 125 / YZF-R 125
Article no.: AFAM12227-48

Rear Sprocket steel 48 teeth - 428 AFAM Yamaha MT 125 / YS 125 / YZF-R 125

21,50 €
In stock
AFAM
Rear Sprocket steel 48 teeth - 428 Afam Rieju MRT
Article no.: AFAM47200-48

Rear Sprocket steel 48 teeth - 428 Afam Rieju MRT

21,00 €
In stock
AFAM
Rear Sprocket steel 48 teeth - 420 AFAM Malaguti NKD
Article no.: AFAM146100-48

Rear Sprocket steel 48 teeth - 420 AFAM Malaguti NKD

21,00 €
In stock
AFAM
Rear Sprocket steel 48 teeth - 420 Afam Rieju MRT
Article no.: AFAM47103-48

Rear Sprocket steel 48 teeth - 420 Afam Rieju MRT

17,50 €
In stock
AFAM
Rear Sprocket steel 47 teeth - 428 AFAM Daelim / Honda / Kymco / Mash
Article no.: AFAM10223-47

Rear Sprocket steel 47 teeth - 428 AFAM Daelim / Honda / Kymco / Mash

9,50 €
In stock
RRP
19,00 €
-50% Discount
AFAM
Rear Sprocket steel 47 teeth - 420 AFAM Yamaha TZR av.2000
Article no.: AFAM12112-47

Rear Sprocket steel 47 teeth - 420 AFAM Yamaha TZR av.2000

21,00 €
In stock
AFAM
Rear Sprocket steel 47 teeth - 420 Afam Yamaha TZR after 2003
Article no.: AFAM12115-47

Rear Sprocket steel 47 teeth - 420 Afam Yamaha TZR after 2003

18,00 €
In stock
AFAM
Rear Sprocket steel 47 teeth - 420 Afam Yamaha TZR 2000-2002
Article no.: AFAM12113-47

Rear Sprocket steel 47 teeth - 420 Afam Yamaha TZR 2000-2002

21,00 €
In stock
AFAM
Rear Sprocket steel 47 teeth - 420 Afam Rieju MRT
Article no.: AFAM47103-47

Rear Sprocket steel 47 teeth - 420 Afam Rieju MRT

17,00 €
In stock
AFAM
Rear Sprocket steel 47 teeth - 420 AFAM Aprilia RS
Article no.: AFAM35104-47

Rear Sprocket steel 47 teeth - 420 AFAM Aprilia RS

23,50 €
In stock
AFAM
Rear Sprocket steel 46 teeth - 420 Afam Peugeot XP6
Article no.: AFAM56103-46

Rear Sprocket steel 46 teeth - 420 Afam Peugeot XP6

21,00 €
In stock
AFAM
Rear Sprocket steel 45 teeth - 520 AFAM Honda CA / CM / VT / XL 125 / KTM Duke 125 / 200
Article no.: AFAM10221-45

Rear Sprocket steel 45 teeth - 520 AFAM Honda CA / CM / VT / XL 125 / KTM Duke 125 / 200

30,00 €
In stock
AFAM
Rear Sprocket steel 40 teeth - 520 AFAM Aprilia RS 125
Article no.: AFAM35801-40

Rear Sprocket steel 40 teeth - 520 AFAM Aprilia RS 125

25,50 €
In stock
AFAM
Rear Sprocket steel 39 teeth - 428 AFAM Kymco Pulsar
Article no.: AFAM10201-39

Rear Sprocket steel 39 teeth - 428 AFAM Kymco Pulsar

20,00 €
In stock
AFAM
Rear Sprocket steel 38 teeth - 525 AFAM KTM 1290 Super Duke
Article no.: AFAM71900-38

Rear Sprocket steel 38 teeth - 525 AFAM KTM 1290 Super Duke

24,50 €
In stock
AFAM
Rear Sprocket steel 38 teeth - 520 AFAM Kymco Maxxer
Article no.: AFAM74300-38

Rear Sprocket steel 38 teeth - 520 AFAM Kymco Maxxer

21,00 €
In stock
AFAM
Rear Sprocket steel 38 teeth - 428 AFAM Kymco Pulsar
Article no.: AFAM10201-38

Rear Sprocket steel 38 teeth - 428 AFAM Kymco Pulsar

16,50 €
In stock
AFAM
Rear Sprocket steel 32 teeth - 520 AFAM Yamaha YFA1 / YFM
Article no.: AFAM12214-32

Rear Sprocket steel 32 teeth - 520 AFAM Yamaha YFA1 / YFM

18,50 €
In stock
AFAM
Rear Sprocket steel 30 teeth - 520 AFAM Kymco Maxxer
Article no.: AFAM74100-30

Rear Sprocket steel 30 teeth - 520 AFAM Kymco Maxxer

18,00 €
In stock
AFAM
Chain AFAM XS-Ring reinforced gold 428 XMR-G 146 links
Article no.: AFAM428XMR-G-146

Chain AFAM XS-Ring reinforced gold 428 XMR-G 146 links

74,00 €
In stock
AFAM
Chain AFAM reinforced gold 520 MR1 88 links
Article no.: AFAM520MR1-G-88

Chain AFAM reinforced gold 520 MR1 88 links

30,00 €
In stock
AFAM
Chain Clip Master Link AFAM black A420
Article no.: AFAMRA420M

Chain Clip Master Link AFAM black A420

1,80 €
In stock
AFAM
Chain Rivet Master Link AFAM XS-Ring reinforced gold A428 XMR-G
Article no.: AFAM428XMR-G

Chain Rivet Master Link AFAM XS-Ring reinforced gold A428 XMR-G

2,20 €
In stock
RRP
4,40 €
-50% Discount
AFAM
Chain Rivet Master Link AFAM XS-Ring reinforced black A525 XMR3
Article no.: AFAM525XMR3

Chain Rivet Master Link AFAM XS-Ring reinforced black A525 XMR3

5,10 €
In stock
AFAM
Chain Rivet Master Link AFAM reinforced gold A428 R1-G
Article no.: AFAM428R1-G

Chain Rivet Master Link AFAM reinforced gold A428 R1-G

1,90 €
In stock
AFAM
Chain Rivet Master Link AFAM black A420
Article no.: AFAM420M

Chain Rivet Master Link AFAM black A420

1,70 €
In stock
AFAM
Front Sprocket AFAM 420 Minarelli AM6
Article no.: AFAM94119/SIZE
1

Front Sprocket AFAM 420 Minarelli AM6

from 6,00 €
In stock
7,00 €
-14% Discount
AFAM
Front Sprocket AFAM 420 Derbi
Article no.: AFAM49102/SIZE

Front Sprocket AFAM 420 Derbi

from 5,00 €
In stock
6,00 €
-17% Discount
AFAM
Chain AFAM reinforced gold 428 R1-G
Article no.: AFAM428R1-G/SIZE

Chain AFAM reinforced gold 428 R1-G

from 13,50 €
In stock
AFAM
Chain AFAM reinforced gold 420 R1-G
Article no.: AFAM420R1-G/SIZE

Chain AFAM reinforced gold 420 R1-G

from 14,00 €
In stock
AFAM
Chain AFAM reinforced black 415
Article no.: AFAM415F/SIZE

Chain AFAM reinforced black 415

from 21,00 €
In stock
AFAM
Chain AFAM black 420
Article no.: AFAM420M/SIZE

Chain AFAM black 420

from 17,50 €
In stock
18,00 €
-3% Discount
Moose Racing
HPO O-Ring 520 chain Moose Racing
Article no.: MRM57300_MASTER

HPO O-Ring 520 chain Moose Racing

from 79,50 €
In stock
81,00 €
-2% Discount
Moose Racing
FB O-Ring 520 Chain Moose Racing
Article no.: MR122200_MASTER

FB O-Ring 520 Chain Moose Racing

from 121,00 €
In stock
174,00 €
-30% Discount
Moose Racing
RXP Pro-MX420 Chain Moose Racing
Article no.: MRM57600_MASTER

RXP Pro-MX420 Chain Moose Racing

from 27,50 €
In stock
Moose Racing
Moose Racing RXP Pro-MX 520 Chain
Article no.: MRM57400_MASTER

Moose Racing RXP Pro-MX 520 Chain

from 74,00 €
In stock
77,00 €
-4% Discount
Piaggio
Wheel Axle Piaggio 4-stroke 4V
Article no.: OE-PIA8416875

Wheel Axle Piaggio 4-stroke 4V

84,50 €
In stock
Piaggio
Countershaft Piaggio NRG, TPH `01-`05, Aprilia SR50R
Article no.: OE-PIA4802185

Countershaft Piaggio NRG, TPH `01-`05, Aprilia SR50R

219,00 €
In stock
Sale
Piaggio
Input Shaft clutch Piaggio Zip2 after 2006
Article no.: OE-PIA4795934

Input Shaft clutch Piaggio Zip2 after 2006

163,00 €
In stock
Peugeot
Countershaft Peugeot/SYM 4-stroke
Article no.: OE-PEU801624

Countershaft Peugeot/SYM 4-stroke

206,00 €
In stock
Derbi
Lever gear selector shaft Derbi Euro2
Article no.: OE-DE1A010685

Lever gear selector shaft Derbi Euro2

15,50 €
In stock
Derbi
Screw rear sprocket M8x1.00 - 30mm Derbi
Article no.: OE-DE00022083021

Screw rear sprocket M8x1.00 - 30mm Derbi

2,00 €
In stock
YCF
Chain Roller Pit Bike YCF50A
Article no.: YCF-50-2201

Chain Roller Pit Bike YCF50A

11,00 €
In stock
YCF
Front Sprocket mud protect d.17mm Pit Bike / Dirt Bike
Article no.: MB22711-152.FMZ/SIZE

Front Sprocket mud protect d.17mm Pit Bike / Dirt Bike

8,50 €
In stock
YCF
Front Sprocket 10 teeth Pit Bike YCF50A
Article no.: MB420H/10T

Front Sprocket 10 teeth Pit Bike YCF50A

8,50 €
In stock
YCF
Swingarm Slider short for cantilever swingarm Pit Bike / Dirt Bike
Article no.: YCF-110-10-021

Swingarm Slider short for cantilever swingarm Pit Bike / Dirt Bike

5,50 €
In stock
RRP
11,00 €
-50% Discount
YCF
Swingarm Slider left side Pit Bike Zongshen 190cc
Article no.: MB100061491

Swingarm Slider left side Pit Bike Zongshen 190cc

2,20 €
In stock
RRP
4,30 €
-49% Discount
YCF Factory
Rear Sprocket aluminium CNC 420 - 43 teeth - 5 screws YCF Pit Bike blue
Article no.: MBCA16R.43BL

Rear Sprocket aluminium CNC 420 - 43 teeth - 5 screws YCF Pit Bike blue

41,50 €
In stock
YCF
Mounting Bracket screws rear sprocket x1 Pit Bike / Dirt Bike
Article no.: YCF-110-11-03

Mounting Bracket screws rear sprocket x1 Pit Bike / Dirt Bike

2,20 €
In stock
YCF
Secondary Gears d.17mm Pit Bike YX 125cc
Article no.: MBE13K040

Secondary Gears d.17mm Pit Bike YX 125cc

35,00 €
In stock
Sale
YCF
Primary Transmission Pit Bike Lifan 88SE / 125SE
Article no.: MB23220-D002-0000

Primary Transmission Pit Bike Lifan 88SE / 125SE

26,50 €
In stock
RRP
53,00 €
-50% Discount
Buzzetti
Chain Tensioner Buzzetti universal cyclomoteurs 12x7x47mm
Article no.: BZA30233

Chain Tensioner Buzzetti universal cyclomoteurs 12x7x47mm

3,80 €
In stock
Standard Parts
Front Sprocket 18 teeth Puch Maxi
Article no.: MOF-28894

Front Sprocket 18 teeth Puch Maxi

4,40 €
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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