1985 Ski-Doo snowmobile Service Manual, Page 308Get this manual

Section 03 TRANSMISSION Sub-section 07 (CHAINCASE)
INSPECTION
Visually inspect the chain for cracked, damaged or mIssing link rollersInspect for defective bearing, sprockets
INSTALLATION

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