1999 Ski-Doo Factory Shop Manual Volume Two, Page 69Get this manual

Section 03 TROUBLESHOOTING Subsection 04 (TRANSMISSION AND BRAKE SYSTEMS)
SYMPTOM CONDITION TestInspection

LOOSENESS IS FELT IN DRIVE SYSTEM WHEN ACCELERATINGDECELERATINGNORMAL USE1Check drive chain tensionaDrive chain is too looseAdjust2Check play of driven pulley Woodruff key (aluminum frame models) aWorn Woodruff key or keywayReplace
SYMPTOM CONDITION TestInspection

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives