2005 Ski-Doo REV Series Shop Manual, Page 43Get this manual
Section 02 TROUBLESHOOTING Subsection 01 (ENGINE)
SYMPTOM
ENGINE EQUIPPED WITH RAVEENGINE HESITATES AT LOW OR MID-SPEED AND REACHES MAXIMUM PERFORMANCE ONLY AFTER WHILE
CONDITION
TESTINSPECTION
NORMAL USE1Check RAVE valve spring(s)aSpring tension is too low or spring(s) is (are) brokenReplace2Check RAVE valve cover red adjustment screwsaAdjustment screw(s) is (are) too looseAdjust according to ASSEMBLY PROCEDURE in appropriate engine subsections3Check RAVE valve movement (RAVE movement indicator PN 861 725 800)aValve(s) is (are) stuck in open positionClean