2004 Skidoo ZX Series Service Manual, Page 84Get this manual
Section 03 TROUBLESHOOTING Subsection 03 (TRANSMISSION AND BRAKE SYSTEM)
SYMPTOM
PULLEYS DO NOT DOWN SHIFT PROPERLY
CONDITION
TESTINSPECTION
NORMAL USE 1Check driven pulley spring tensionaSpring tension is too lowAdjust according to specifications (refer to TECHNICAL DATA) or replace spring2Refer to VIBRATIONS COMING FROM DRIVEN PULLEY and check items listed3Check drive pulley bushings (cleanliness, wear, etcaBushings stick to fixed half pulley shaftClean or replace
SYMPTOM
IN REVERSE ENGINE FAILS AND DRIVEN PULLEY OPENS TOO FAST (DRIVE BELT IS LOW IN DRIVEN PULLEY)
CONDITION