2004 Ski-Doo REV Series Factory Service Manual, Page 87Get this manual
Section 03 TROUBLESHOOTING Subsection 03 (TRANSMISSION AND BRAKE SYSTEM)
SYMPTOM
BELT "FLIP-OVER" AT HIGH SPEED
CONDITION
TESTINSPECTION
NORMAL USE 1Check pulley alignmentaPulley misalignmentAlign pulley according to specifications (refer to TECHNICAL DATA)2Check drive belt identification numberaWrong type of beltReplace with an appropriate drive belt
BRAKE SYSTEM HYDRAULIC BRAKE
SYMPTOM SPONGY BRAKE CONDITION
CONDITION
TESTINSPECTION
NORMAL USE 1Contaminated brake fluidReplace brake fluid and bleed systemIf the problem persists, replace master cylinder