Twist Control: an absolute drive innovation from Naraku. Twist Control absorbs the torsion from the torque driver and even out the loss of power from the lack of friction. The result is smooth converter function that makes a significant difference on untuned engines. The vehicle accelerates better and the height of the spring preload equates to a 15% stronger counter pressure spring. Heat-resistant torque driver grease should be used for the system. For use in untuned and racing engines. Suitable for all Minarelli engines with 105mm [2 block clutch] and all CPI, Keeway, Generic, Mawi, Longija and other Chinese-built, Minarelli-based 2-strokes. Counter pressure spring for illustration purposes only and is not included in the delivery!