2008 Polaris Sportsman 700/800/700 X2 EFI Service Manual, Page 77Get this manual
ENGINE Valve Inspection
12Remove all carbon from valves with soft wire wheel or brushCheck valve face for runout, pitting, and burnt spotsTo check for bent valve stems, mount valve in drill or use "V" blocks and dial indicatormeasurements total)Compare to specificationsMeasure valve stem in several placesRotate the valve 90 degrees and measure for wear= In mmValve Stem Diameter: Intake: 0.2356"0.00039" (5.9850.01 mm) Exhaust: 0.2351"0.00039" (5.9720.01 mm) 6Measure valve guide (C) inside diameter at the top middle and end of the guide using small hole gauge and micrometerMeasure in two directionsCheck end of valve stem for flaring, pitting, wear or damage (A)5