1997 Ski-Doo Factory Shop Manual Volume Two, Page 30Get this manual
Section 02 TROUBLESHOOTING Sub-Section 02 (ENGINE)
SYMPTOM CONDITION TestInspection
ENGINE EQUIPPED WITH "RAVE"ENGINE HESITATES AT MID-SPEED AND REACHES MAXIMUM PERFORMANCE ONLY AFTER WHILE NORMAL USE 1Check "RAVE" valve spring(s)a.Spring tension is too weak or spring(s) is (are) brokenReplace2Check "RAVE" valve cover red adjustment screwsa.Adjustment screw(s) is (are) too looseFully tighten3Check "RAVE" valve movement ("RAVE" movement indicator PN 861 7258 00)a.Valve(s) is (are) stuck in open positionClean