2003 Polaris Scrambler 50-90 Sportsman 90 Predator 90 Service Manual, Page 41Get this manual
ENGINE Cylinders 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! After honing has been completed inspect all port opening areas for rough or sharp edgesApply slight chamfer to all ports to remove sharp edges or burrs, paying particular attention to the corners of the intake and exhaust ports
HONING TO OVERSIZE
If cylinder wear or damage is excessive, it will be necessary to oversize the cylinder using new oversize piston and ringsThis may be accomplished by either boring the cylinder and then finish honing to the final bore size, or rough honing followed by finish honing