2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 90Get this manual

2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 90

ENGINE 4Measure piston ring to groove clearance by placing the ring in the ring land and measuring with thickness gaugeReplace
gap measurement exceeds the service limit, replace the ringsIf ring gap is below specified limit, file ring ends until gap
is within specified rangeNOTE: Always check piston ring installed gap after re-boring cylinder or when installing new ringsA
re-bored cylinder should always be scrubbed thoroughly with hot soapy water, rinsed, and dried completelyWipe cylinder bore
with an oiled rag immediately to remove residue and prevent rust Piston Identification The piston may have an identification
mark or the piston may not have an identification mark for piston placementIf the piston has an identification mark, follow
the directions for piston placement belowIf the piston does not have an identification mark, the direction for placement
of the piston does not matterNote the directional and identification marks when viewing the pistons from the topThe letter