2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 73Get this manual
ENGINE ENGINE DISASSEMBLY
Cam Chain TensionerRocker ArmCamshaft Removal
1Remove ignition timing inspection plug from recoil housingTDC "T" Mark 4Align single (TDC) 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 lobe should be pointing down and valves should have clearance at this point
Rotation