2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 43Get this manual
MAINTENANCE 7Verify accurate TDC positioning by observing the "T" mark aligned with the pointer in the timing inspection holeIn this position there should be clearance on all valves1Insert .006" (.15mm) feeler gauge between end of both exhaust valve stem and adjuster screw(s)2Loosen locknut(s) and turn adjuster screw(s) until there is slight drag on feeler gauge(s)The Valve Clutch Adjuster Tool (PA-44689) can be used to adjust the engines valvesNOTE: Both feeler gauges should remain inserted during adjustment of each valveEXHAUST VALVE CLEARANCE .006" (.15 mm) 3When clearance is correct, hold adjuster screws and tighten locknuts securely4Re-check the valve clearance5Repeat adjustment procedure if necessary until clearance is correct with locknut secured
Intake Valve Clearance Adjustment
1Insert .006" (.15mm) feeler gauge between end of intake valve stem and clearance adjuster screw2Using 10 mm wrench and screwdriver, loosen adjuster lock nut and turn adjusting screw until there is slight drag on the feeler gauge3Hold adjuster screw and tighten adjuster lock nut securely4Re-check the valve clearance5Repeat adjustment procedure if necessary until clearance is correct with locknut secured6Repeat this step for the other intake valveINTAKE VALVE CLEARANCE .006" (.15 mm)