2007-2008 Polaris IQ Snowmobiles Service Manual, Page 128Get this manual
Engine and Cooling Systems
Cylinder Honing
The cylinder bore must be de-glazed whenever new piston rings are installedA light honing with fine stones removes only very small amount of materialA proper crosshatch pattern is important to provide surface that will hold oil, and allow the rings to seat properlyIf the crosshatch is too steep, oil retention will be reducedA crosshatch angle which is too shallow will cause ring vibration, poor sealing, and overheating of the rings due to blow-by and reduced contact with the cylinder wallService life of the pistons and rings will be greatly reducedNOTE: Nicasil cylinder can be lightly honed with soft stone hone but an not be oversizeduntil stone contacts the cylinder walls (DO NOT OVERTIGHTEN)Cylinders may be wet or dry honed depending on the hone manufacturer's recommendationsWet honing removes more material faster and leaves more distinct pattern in the boreUsing .50" (13 mm) drill motor rotating at speed of 300-500 RPM, run the hone in and out of the cylinder rapidly until cutting tension decreasesRemember to keep the hone drive shaft centered to prevent edge loading and always bring the stone approximately .5" (1.2 cm) beyond the bore at the end of each strokeRelease the hone at regular intervals to inspect bore size and finish