2001 Polaris Sportsman 400-500 DUSE and H.O. Service Manual, Page 126Get this manual
CRANKSHAFT END PLAY ADJUSTMENT, CONT4Measure the distance from the Magneto crankcase mating surface to the main bearing using the same method and record
5Subtract the thickness of the straightedge from the measurement obtained in Step and record
Mag Case Depth 6Add the readings recorded in Step and Step and record belowTotal Case Width 7Measure the width of the crankshaft at the bearing seats with micrometer or dial caliper and record