1985-1995 Polaris ATV and Light Utility Hauler Service Manual, Page 288Get this manual
ENGINES Magnum Engine DisassemblyInspection To position crankshaft at Top Dead Center (TOC) on compression stroke:
45Rotate engine slowly in the direction of rotation watching intake valves open and start to closeContinue to rotate engine slowly, watching camshaft sprocket marks and the mark in the timing inspection holeAlign mark on flywheel with projection in inspection hole, and the cam sprocket pin (facing upward) aligned with the camshaft to crankshaft center lineNOTE: The cam lobes should be pointing down and all valves should have clearance at this pointRemove cam chain tensioner plug, sealing washer, and springCAUTION: The plug is under spring tensionMaintain inward pressure while removing8Remove the two 6x25 mm cam chain tensioner flange bolts9Tap lightly on tensioner body with soft face hammer and remove tensioner