Valve Inspection - Polaris Sportsman 400 Service Manual

VALVE INSPECTION

1. Remove all carbon from valve with a soft wire wheel.
2. Check valve face for runout, pitting, and burnt spots.
To check for bent valve stems, mount valve in a drill or
use "V" blocks and a dial indicator.
3. Check end of valve stem for flaring, pitting, wear or
damage (A).
4. Inspect split keeper groove for wear or flaring of the
keeper seat area (B). NOTE: The valves cannot be
re-faced or end ground. They must be replaced if
worn, bent, or damaged.
5. Measure diameter of valve stem with a micrometer in
three places and in two different directions (six
measurements total). Compare to specifications.
Valve Stem Diameter:
Intake: .2343-.2348I (5.950-5.965 mm)
Exhaust: .2341-.2346I (5.945-5.960 mm)
- projex@inbox.lv -
ENGINE
A
B
Measure valve stem in
several places.
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