Polaris Sportsman 400 Service Manual page 89

ENGINE
ROCKER ARM/SHAFT INSPECTION, CONT.
4. Measure I.D. of each rocker arm and compare to
specifications.
Rocker Arm & Support I.D.:
.8669-.8678I (22.020-22.041 mm)
5. Measure I.D. of both rocker arm shaft supports and
visually inspect surface. Compare to specifications.
6. Subtract rocker shaft O.D. from rocker arm & shaft
support I.D. This is the oil clearance. Compare to
specifications.
Rocker Shaft Oil Clearance:
Std: .0008-.0021I (.020-.054 mm)
Limit: .0039I (.10 mm)
7. Inspect rocker adjuster screws for wear, pitting, or
damage to threads of the adjuster or locknut.
Replace all worn or damaged parts. NOTE: The
end of the adjuster screw is hardened and cannot be
ground or re-faced.
3.20
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