1999 Polaris PWC Genesis, Ficht, X-45 Service Manual, Page 135Get this manual
ENGINE DisassemblyInspectionPolaris Engines 20 Loosen cylinder base nuts evenly in criss cross patternSupport pistons while removing cylindersNOTE: Each cylinder and piston should be marked to keep all parts together as matched setIf parts are to be reinstalled keep piston pins and top bearings together with their respective cylindersAlways use new piston pin C-clips upon reassembly
21 .Inspect each cylinder for wear, scratches, or damageIf no damage is evident, measure cylinder for taper and out of round with telescoping gauge and micrometer or dial bore gaugeMeasure bore 12" down from top of cylinder in two directionsin line with piston pin and 90 to the pin to determine if bore is out of roundRepeat measurements at bottom of cylinder to determine taper or out of round at the bottomRecord all measurementsNOTE: If cylinders are worn or damaged refer to page 4.44-4.45 for boringhoning and port chamfer information