Polaris SPORTSMAN 400 2003 Service Manual page 90

4. Measure the distance from the Magneto
crankcase mating surface to the main bearing
using the same method and record.
5. Subtract the thickness of the straightedge from
the measurement obtained in Step 4 and record.
Mag Case Depth
6. Add the readings recorded in Step 3 and Step 5
and record below.
Total Case Width
7. Measure the width of the crankshaft at the
bearing seats with a micrometer or dial caliper
and record.
Crankshaft Width
8. Subtract the Crankshaft Width measured in Step
7 from the Total Case Width recorded in Step 6,
and record below.
Total End Play
9. Subtract the thickness of the existing shim from
the result of Step 8 to determine if a different shim
is required. The result must be within the
specified range listed at right.
Crankshaft End Play:
.008²-.016² (.02-.04 cm)
ENGINE
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