Combustion Chamber - Polaris Sportsman 400 Service Manual

ENGINE
VALVE INSPECTION, CONT.
6. Measure valve guide inside diameter at the top middle
and end of the guide using a small hole gauge and a
micrometer. Measure in two directions, front to back
and side to side.
7. Subtract valve stem measurement to obtain stem to
guide clearance. NOTE: Be sure to measure each
guide and valve combination individually.
8. Replace valve and/or guide if clearance is excessive.
Compare to specifications.
Valve Guide I.D.:
.2362-.2367I (6.0-6.012 mm)
NOTE: If valve guides are replaced, valve seats must be
reconditioned. Refer to Valve Seat Reconditioning for pro-
cedure.

COMBUSTION CHAMBER

Clean all accumulated carbon deposits from combustion
chamber and valve seat area with a soft wire brush.
3.30
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