1997 Ski-Doo Factory Shop Manual Volume One, Page 35Get this manual
Sub-Section 04
Section 02 TROUBLESHOOTING (TRANSMISSION AND BRAKE SYSTEMS)
SYMPTOM CONDITION TestInspection
PULLEYS DO NOT DOWN SHIFT PROPERLYNORMAL USE1Check driven pulley spring tensionaSpring tension is too weakAdjust according to specifications (refer to TECHNICAL DATA 09)2Refer to "Vibrations coming from driven pulley" and check items listed3Check drive pulley bushings (cleanliness, wear, etcaBushings stick to fixed half pulley shaftClean or replace4Check driven pulley spring tensionaSpring tension is too weakReplace
SYMPTOM CONDITION TestInspection