2003 Ski-Doo REV Series Factory Shop Manual, Page 98Get this manual
Section 03 TROUBLESHOOTING Subsection 06 (SUSPENSION AND TRACK)
SYMPTOM CONDITION TESTINSPECTION
REAR SUSPENSION IS TOO STIFFNORMAL USE1Check rear spring preloadaToo much preloadAdjust to softer position2Check springsaSprings installed are too stiffInstall optional softer springs, refer to Service Bulletin SPRING REFERENCE ACCORDING TO LOAD3Check the rear shock motion ratio positionaIt is adjusted in firm positionAdjust rear shock motion ratio to soft position4Check track tensionaTrack is too tightAdjust5Check if axles are properly lubricatedaImproper lubrication andor contaminated grease (sticky oil sludge)Clean andor lubricate