1997 Ski-Doo Factory Shop Manual Volume Three, Page 139Get this manual
Section 04 TRANSMISSION Sub-Section 07 (CHAINCASE)
REMOVAL
To remove chaincase proceed as followsRemove tuned pipes and muffler
INSPECTION
Visually inspect the chain for cracked, damaged or missing linksCheck for worn or defective bearings, sprockets and chain tensioner components
WARNING
Never remove exhaust components when engine is hotRemove hair pin no18Release drive chain tension by unscrewing tensioner adjustment screwDrain oil by removing chaincase cover no2
WARNING
If chain deflection is greater than 38 mm (1.5 in) (without chain tensioner), replace chain and check condition of sprockets
GEAR RATIO MODIFICATION