2008 Polaris Sportsman 500 EFI/X2/Touring/500 H.O. Service Manual, Page 70Get this manual
ENGINE A finished cylinder should have cross-hatch pattern to ensure piston ring seating and to aid in the retention of the fueloil mixture during initial break inHone cylinder according to hone manufacturer's instructions, or these guidelines: Use motor speed of approximately 300-500 RPM, run the hone in and out of the cylinder rapidly until cutting tension decreasesRemember to keep the hone drive shaft centered (or cylinder centered on arbor) and to bring the stones approximately 12" (1.3 cm) above and below the bore at the end of each stroke Release the hone at regular intervals and inspect the bore to determine if it has been cleared, and to check piston fitNOTE: Do not allow cylinder to heat up during honingThe thinner areas of the liner around the ports will expand causing uneven 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