The MT-IGN-REV 99-02 RACER rev-limiter was designed for ALL 1999-02 Sea•Doo watercraft with 951cc R.A.V.E. engines only. (Carbureted Models ONLY) The curve below was derived from the XP-L/GSX-L Watercraft and was also very close to being the same curve found in the RX Models. After almost 2 years of testing and installing the Ignition/Rev-Limiter on many racing watercraft we have altered the curve to perform on all the mentioned watercraft. After almost 500 different curves tested we found this curve to work best under all types of riding - Pleasure to Racing!