1997 Ski-Doo Factory Shop Manual Volume Two, Page 42Get this manual
Section 02 TROUBLESHOOTING Sub-Section 04 (TRANSMISSION AND BRAKE SYSTEMS)
SYMPTOM CONDITION TestInspection
BELT "FLIP-OVER" AT HIGH SPEED NORMAL USE 1Check pulley alignmenta.Pulley misalignmentAlign pulley according to specifications (refer to TECHNICAL DATA 09)2Check drive belt identification numbera.Using unspecified type of beltReplace belt with an appropriate drive belt