Many vehicles are factory-fitted with restrictors or restricted CDI units. Malossi offer this clever RPM Control Racing CDI unit. 35,000 - 50,000V current and adjustable rev limit. Screw adjuster for rev limit, then the flip switch activates or de-activates the limiter. Not suitable for vehicles with immobilisers and Yamaha/MBK vehicles from 2004 on (Euro2 models). Minarelli uses 3 different alternators in their engines, but does not indicate which item is in which vehicle at any given time, but generally use a Yamaha item. The Malossi CDI is only suitable for vehicles with the Yamaha rotor. Please check this prior to ordering.