2008 Polaris ATV Predator 50, Sportsman Outlaw 90 Service Manual, Page 65Get this manual
ENGINETRANSMISSION Cylinder Inspection
12Remove all gasket material from the cylinder sealing surfacesRefer to specifications at beginning of chapterInspect the top of the cylinder for warpage using straight edge and feeler gauge
Cylinder Honing Procedure CAUTION
A hone which will straighten as well as remove material from the cylinder is very importantUsing common spring loaded glaze breaker for honing is not advisedPolaris recommends using rigid hone or arbor honing machineCylinders may be wet or dry honed depending upon the hone manufacturer's recommendationsWet honing removes more material faster and leaves more distinct pattern in the bore