1997-1998 Polaris SLX-Pro 785 Service Manual Supplement, Page 41Get this manual
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ENGINECOOLING Engine Removal
Remove cylindersMark each cylinder and piston with 1, 2, or to keep each piston and cylinder set together for reassemblyCylinder Measurement
Inspect 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 bottom of the cylinder to determine taper or out of round at the bottomRecord all measurements