2003 Ski-Doo REV Series Factory Shop Manual, Page 79Get this manual
Subsection 04
Section 03 TROUBLESHOOTING (TRANSMISSION AND BRAKE SYSTEMS)
SYMPTOM CONDITION TESTINSPECTION
VIBRATIONS ORIGINATING FROM DRIVE PULLEYNORMAL USE1Check drive beltaBelt width is uneven on several placesReplace2Check tightening torque of drive pulley screwaMoving governor cupRetighten screw3Spring cover screwsaSpring cover moves and restrains sliding half movementRetighten screws4Check spring cover (TRA TYPE) andor sliding half bushingsaExcessive gap between bushings and fixed half shaft, thus restraining sliding half movementsReplace bushing(s)5Check governor cup splinesaExcessive radial playReplace governor cup6Check lever assemblyaLever assembly is damaged (worn bushing, bent lever etcReplace damaged part