1985 Ski-Doo snowmobile Service Manual, Page 307Get this manual
Section 03 TRANSMISSION Sub-section 07 (CHAINCASE)
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Oil seal Ball bearing Spacer Chalncase Oil retainer rmg Ball bearing Single sprocket Washer Lock tab Cap screw M6 20Breather Spacer Spring Chain tensioner ISBushing
1617 18 192021
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Cap screw M6 40Tapme screw M6 16 Shim Flat washer 8.4 mm (except Citation LSf) Lock washer mm Cap screw M8 125 25 Single sprocket Clrclip Driving chain Sealing strip Chaincase cover Chaincase plug Drive axle holder Chaincase oil 20.0ml (7 oz) Shim (Citation LSf onlv)
REMOVAL
Chaincase and driven pulley can be removed from the vehicle as an assemblyRemove clevis pin from the bracket
7,22,24, Sprocketschain
Unscrew the bolt on the upper sprocket and remove circlip on the bottom oneRemove chain and sprockets simultaneously