2003 Polaris 3 PRO X Factory Service Manual, Page 85Get this manual
ENGINE Cylinder Head Inspection
1Inspect each cylinder head for warpingReplace cylinder head if warp exceeds service limit
Cylinder Head Warp Service Limit: .003 (.08mm)
Cylinder Measurement
2Inspect each cylinder for wear, scratches, or damageIf no damage is evident, measure the cylinder for taper and out of round with telescoping gauge or dial bore gaugeMeasure the bore 12 from the top of the cylinder; in line with the piston pin and 90 to the pin to determine if the bore is out of roundRepeat the measurements at the middle and bottom of the cylinder to determine taper or out of round at the bottomRecord all measurementsCylinder Taper Limit: .002 MaxCylinder Out of Round Limit: .002 MaxMiddle X