The XM2 Kit is supplied with three throttle speed rings. The three speed rings have different affects on the throttle, they are as follows.
Domino XM2 Quick Action Throttle Black / Red Grips For Road & Track Use
Genuine Domino XM2 Quick Action Throttle Cables - Universal Road, Track & Race
Domino XM2 Quick Action Throttle Kit with Grips / Racing Race Track Use Only
Genuine Domino XM2 Quick Action Throttle & Venhill Cable Kit - Black & Red Grips
Domino XM2 Quick Action Throttle Universal Cable Set & Red Grips Race Track Bike
