A video about my Derbi Gpr 50, 2 stroke. The intro song is called "New Fang" by 'Them Crooked Vultures' Link to site: ...
Derbi GPR nude bouwjaar 2008 Top speed: 81km/h 8:23 Orginele setup, prop is uit de uitlaat.
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FOR DERBI D50B0
Athena S.p.A. proudly introduces the new RACING 50cc cylinder kit with exhaust valve, for the Derbi/Piaggio D50B engine. The new cylinder kit was designed with a pneumatic valve system to guarantee better engine response and torque at low and medium engine speeds, guaranteeing the user a fluid and high performing ride in every situation or on all racing terrains. The throttle valve, designed by Athena already used in the cylinder kit for AM engines, operates through a pneumatic system that exploits exhaust gasses to activate the valve. The pneumatic system is supplied with two different contrast springs that allow the valve's opening to be adjusted. This makes it possible to avoid the use of an electronic control unit.
50CC CYLINDER KIT WITH EXHAUST VALVE
Suggested price: 399.00 +vat Product code: P400105100008
P400105100008 (39,88mm - 50cc)
Top End gasket kit