2004 Polaris Sportsman 700 EFI ATV Service Manual, Page 64Get this manual
VALVE INSPECTION
1Remove all carbon from valves with soft wire wheel or brush2Check valve face for runout, pitting, and burnt spotsTo check for bent valve stems, mount valve in drill or use "V" blocks and dial indicator
Valve Stem Diameter: Intake: 0.2356" 0.00039" (5.985 0.01 mm) Exhaust: 0.2346" 0.00039" (5.96 0.01 mm)
Measure valve stem in several placesRotate the valve 90 degrees and measure for wear
3Check end of valve stem for flaring, pitting, wear or damage (A)