1985-1995 Polaris ATV and Light Utility Hauler Service Manual, Page 291Get this manual
ENGINES Magnum Engine Disassemblyllnspection Camshaft Removal 1Remove camshaft sprocket inspection cover2Loosen three camshaft sprocket bolts3Remove thermostat housing and thermostatNote the location of the air bleed holes in the thermostatUpon reassembly, the thermostat bleed holes should be positioned next to the holes for the thermostat cover bolts
Remove camshaft end cap and a-RingPlace clean shop towel in the area below cam chain sprocket and remove sprocket retaining boltsSlide camshaft inward to allow removal of cam sprocket and remove sprocket from camshaft and chainSecure cam chain with wire to prevent it from falling into the crankcase8Inspect cam sprocket teeth for wear or damageReplace if necessary9Slide camshaft out the PTa side of the cylinder head