2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 80Get this manual

2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 80

ENGINE 4Measure free length of spring with Vernier caliperCheck spring for squarenessCompare to specificationsReplace spring
(5.950-5.965 mm) Exhaust: .2341-.2346" (5.945-5.960 mm) 6Measure valve guide inside diameter at the top middle and end of
the guide using small hole gauge and micrometerMeasure in two directions, front to back and side to side Valve Inspection
1Remove all carbon from valve with soft wire wheel2Check valve face for runout, pitting, and burnt spotsTo check for bent
valve stems, mount valve in drill or use "V" blocks and dial indicator 3Check end of valve stem for flaring, pitting, wear
or damage (A)A Valve Guide I.D .2362.2367" (6.06.012 mm) 7Subtract valve stem measurement to obtain stem to guide clearanceNOTE: