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Sale 1.00€ Reward points: 3
AFAM Chain Kit 11x47 Yamaha TZR after 2003 AFAM Chain Kit 11x47 Yamaha TZR after 2003 AFAM Chain Kit 11x47 Yamaha TZR after 2003
AFAM AFAM Chain Kit 11x47 Yamaha TZR after 2003 70.00€69.00€
Reward points: 3
Afam Chain Kit 11x52 420 Rieju MRT / Street Evo after 2011 Afam Chain Kit 11x52 420 Rieju MRT / Street Evo after 2011 Afam Chain Kit 11x52 420 Rieju MRT / Street Evo after 2011
Reward points: 3
AFAM Chain Kit 11x52 Peugeot XP7/XR7/NK7 2005 - 2008 AFAM Chain Kit 11x52 Peugeot XP7/XR7/NK7 2005 - 2008 AFAM Chain Kit 11x52 Peugeot XP7/XR7/NK7 2005 - 2008
Reward points: 3
AFAM Chain Kit 11x53 Aprilia RS/RX/RS4 2006 - 2010 AFAM Chain Kit 11x53 Aprilia RS/RX/RS4 2006 - 2010 AFAM Chain Kit 11x53 Aprilia RS/RX/RS4 2006 - 2010
Reward points: 3
AFAM Chain Kit 11x53 Derbi SM Race / X-trem after 2006 AFAM Chain Kit 11x53 Derbi SM Race / X-trem after 2006 AFAM Chain Kit 11x53 Derbi SM Race / X-trem after 2006
Reward points: 3
AFAM Chain Kit 11x60 Peugeot XP7/XR7/NK7 2005 - 2008 AFAM Chain Kit 11x60 Peugeot XP7/XR7/NK7 2005 - 2008 AFAM Chain Kit 11x60 Peugeot XP7/XR7/NK7 2005 - 2008
Sale 1.00€ Reward points: 3
AFAM Chain Kit 11x60 Yamaha TZR after 2003 AFAM Chain Kit 11x60 Yamaha TZR after 2003 AFAM Chain Kit 11x60 Yamaha TZR after 2003
AFAM AFAM Chain Kit 11x60 Yamaha TZR after 2003 70.00€69.00€
Reward points: 3
Afam Chain Kit 12x50 428 Beta 50 RR Factory 2005 - 2013 Afam Chain Kit 12x50 428 Beta 50 RR Factory 2005 - 2013 Afam Chain Kit 12x50 428 Beta 50 RR Factory 2005 - 2013
Sale 0.80€ Reward points: 3
Afam Chain Kit 12x51 420 Beta 50 RR 2002 - 2005 Afam Chain Kit 12x51 420 Beta 50 RR 2002 - 2005 Afam Chain Kit 12x51 420 Beta 50 RR 2002 - 2005
AFAM Afam Chain Kit 12x51 420 Beta 50 RR 2002 - 2005 61.80€61.00€
Reward points: 3
AFAM Chain Kit 12x53 Aprilia RS/RX/RS4 2006 - 2010 AFAM Chain Kit 12x53 Aprilia RS/RX/RS4 2006 - 2010 AFAM Chain Kit 12x53 Aprilia RS/RX/RS4 2006 - 2010
Reward points: 3
AFAM Chain Kit 13x53 Derbi SM Race / X-trem after 2006 AFAM Chain Kit 13x53 Derbi SM Race / X-trem after 2006 AFAM Chain Kit 13x53 Derbi SM Race / X-trem after 2006
Reward points: 3
AFAM Chain Kit 14x53 Derbi SM Race / X-trem 2006 - 2010 AFAM Chain Kit 14x53 Derbi SM Race / X-trem 2006 - 2010 AFAM Chain Kit 14x53 Derbi SM Race / X-trem 2006 - 2010
Sale 7.00€ Reward points: 1
Afam Chain super reinforced 120 links size=415 gold
Standard Parts Afam Chain super reinforced 120 links size=415 gold 20.00€13.00€
Sale 0.30€
Afam Front Sprocket 12 teeth for chain 428 Minarelli AM6
Reward points: 1
Afam Rear Sprocket Beta RR 02 / 05 51 teeth (420) Afam Rear Sprocket Beta RR 02 / 05 51 teeth (420) Afam Rear Sprocket Beta RR 02 / 05 51 teeth (420) Afam Rear Sprocket Beta RR 02 / 05 51 teeth (420)
Reward points: 2
Afam Rear Sprocket Beta RR Factory 50 teeth (428)
Reward points: 2
Afam Rear Sprocket Sherco 50 Enduro / SM 56 teeth (428) Afam Rear Sprocket Sherco 50 Enduro / SM 56 teeth (428) Afam Rear Sprocket Sherco 50 Enduro / SM 56 teeth (428) Afam Rear Sprocket Sherco 50 Enduro / SM 56 teeth (428)
Reward points: 1
Ball Bearing SKF 16005 - 25x47x8mm auxiliary shaft Vespa Classic / Ape
Reward points: 25
Bidalot Primary Transmission Racing Factory Derbi Euro 3 (D50B0) Bidalot Primary Transmission Racing Factory Derbi Euro 3 (D50B0) Bidalot Primary Transmission Racing Factory Derbi Euro 3 (D50B0) Bidalot Primary Transmission Racing Factory Derbi Euro 3 (D50B0) Bidalot Primary Transmission Racing Factory Derbi Euro 3 (D50B0)
Reward points: 26
Bidalot Transmission Racing Factory Derbi Euro 2 / Euro 3 Bidalot Transmission Racing Factory Derbi Euro 2 / Euro 3 Bidalot Transmission Racing Factory Derbi Euro 2 / Euro 3
Reward points: 25
Bidalot Transmission Racing Factory Minarelli AM6 Bidalot Transmission Racing Factory Minarelli AM6 Bidalot Transmission Racing Factory Minarelli AM6 Bidalot Transmission Racing Factory Minarelli AM6
Breather Hose + Adapter Minarelli
Minarelli Breather Hose + Adapter Minarelli 6.90€
NEW
Cam Chain Tensioner d.10mm white Cam Chain Tensioner d.10mm white
Standard Parts Cam Chain Tensioner d.10mm white 5.50€
NEW
Chain 116 links type TF8 Pocket Bike 49cc
Standard Parts Chain 116 links type TF8 Pocket Bike 49cc 7.20€
NEW
Chain Guard Generic Trigger
Standard Parts Chain Guard Generic Trigger 14.00€
Chain Guide - original Derbi Senda Chain Guide - original Derbi Senda Chain Guide - original Derbi Senda
Derbi Chain Guide - original Derbi Senda 28.00€
Chain Guide Derbi / Aprilia / Gilera blue
Standard Parts Chain Guide Derbi / Aprilia / Gilera blue 21.50€
Chain Guide Derbi / Aprilia / Gilera red
Standard Parts Chain Guide Derbi / Aprilia / Gilera red 21.50€
Chain Guide Derbi / Aprilia / Gilera silver Chain Guide Derbi / Aprilia / Gilera silver Chain Guide Derbi / Aprilia / Gilera silver
Standard Parts Chain Guide Derbi / Aprilia / Gilera silver 16.00€
Sale 3.90€
Chain Guide Derbi Senda R
Standard Parts Chain Guide Derbi Senda R 11.90€8.00€
NEW
Chain Guide Doppler Rieju MRT gold Chain Guide Doppler Rieju MRT gold
Doppler Chain Guide Doppler Rieju MRT gold 30.00€
NEW
Chain Guide Doppler Rieju MRT red Chain Guide Doppler Rieju MRT red
Doppler Chain Guide Doppler Rieju MRT red 30.00€
NEW
Chain Guide Pit Bike / Dirt Bike Apollo green
Standard Parts Chain Guide Pit Bike / Dirt Bike Apollo green 6.90€
NEW
Chain Guide Pit Bike / Dirt Bike Apollo red
Standard Parts Chain Guide Pit Bike / Dirt Bike Apollo red 6.90€
NEW
Chain Guide Pit Bike Apollo SMX
Standard Parts Chain Guide Pit Bike Apollo SMX 8.00€
Reward points: 1
Chain Guide Rieju 50
Standard Parts Chain Guide Rieju 50 12.00€
THE TRANSMISSION - TUNING VIA GEAR RATIO

The gearbox or transmission is a mechanical device that transfers motion from one part to another, with the possibility of changing speed and torque. On a scooter, there is the primary transmission (input shaft on torque drive + intermediate shaft) and the secondary transmission (intermediate shaft + output shaft on the wheel). Ttransmission ratio has a great influence on acceleration and final speed - a short transmission ratio brings ... good acceleration, but is a bit weak on speed, which can be compensated by a longer gear ratio.

THE COMPLEX WORLD OF GEAR RATIOS

Maybe you just need to replace worn gear parts, or maybe you want to adjust the gear ratio after upgrading to a stronger cylinder. In both cases we recommend replacing both primary and secondary transmission 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. The use of a longer gear ratio may even worsen acceleration under certain circumstances, so you should always adapt the gearbox to the available speed. Longer does not always mean better, it is best to get some relevant information before installing a new transmission!
In our online shop we carry a large selection of individual gears and complete gearboxes for most scooters, mopeds and maxi scooters. Leading brands such as Stage6, Top Performances, Malossi, Polini and Doppler, we offer you real quality products at fair prices to improve the performance of your engine.