2001 Ski-Doo Factory Shop Manual Volume One, Page 68Get this manual
Section 03 TROUBLESHOOTING Subsection 02 (ENGINE)
SYMPTOM CONDITION TestInspection
ENGINE EQUIPPED WITH RAVE VALVE DOES NOT REACH ITS FULL OPERATING RPM (500 TO 1000 RPM SLOWER)NORMAL USE1Check RAVE valve pistonsaValve piston(s) is (are) too far outScrew valve piston(s) to bottom2Check RAVE valve stemsaBent RAVE valve stem(s)Replace3Check RAVE valvesaJammed valve(s)Clean4Check tension of RAVE springsaInadequate spring tensionReplace5Check RAVE pressure holesaClogged holesClean6Check clamps or sleevesaDamaged clamp(s) or sleeve(s)Replace7Check exhaust tightnessaExhaust system is leaking leading to too low back pressureReplaces parts and reseal
SYMPTOM CONDITION TestInspection