Honing Procedure; Port Chamfering; Cleaning The Cylinder After Honing - Polaris INDY TRAIL RMK Service Manual

ENGINES

Honing Procedure

1. Wash cylinder with solvent. Clamp cylinder in a soft jawed vise by the exhaust port studs.
2. Place hone in cylinder and tighten stone adjusting knob until stone contacts the cylinder walls (DO NOT
OVERTIGHTEN). Cylinders may be wet or dry honed depending on the hone manufacturer's
recommendations. Wet honing removes more material faster and leaves a more distinct pattern in the bore.
Using a 1/2I (13 mm) drill motor rotating at a speed of 300-500 RPM, run the hone in and out of the cylinder
rapidly until cutting tension decreases. Remember to keep the hone drive shaft centered to prevent edge
loading and always bring the stone approximately 1/2I (1.3 cm) beyond the bore at the end of each stroke.
Release the hone at regular intervals to inspect bore size and finish.

Port Chamfering

Remove the sharp edges at the bottom and top of each port whenever boring or honing is performed. Make sure
there are no sharp edges.
IMPORTANT:

Cleaning the Cylinder After Honing

It is very important that the cylinder be thoroughly cleaned after honing to remove all grit material. Wash the cylin-
der in a solvent, then in hot soapy water. Pay close attention to areas where the cylinder sleeve meets the alumi-
num casting (transfer port area). Use electrical contact cleaner if necessary to clean these areas. Rinse thor-
oughly, dry with compressed air, and oil the bore immediately with Polaris Premium 2 Cycle Lubricant.
NOTE:Always check piston to cylinder clearance and piston ring installed gap after boring/honing is complete!
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