2003 Polaris Scrambler 50-90 Sportsman 90 Predator 90 Service Manual, Page 42Get this manual
CRANKSHAFT RUNOUT
Lubricate the bearings and clamp the crankshaft securely in the holding fixtureRefer to the illustrations
Connecting Rod Small End Service Limit .553! (14.04 mm) Reed Valve Inspection 1Measure the air gap between fiber reed and reed block as shownThe air gap should not exceed .015 (.40 mm) If clearance is excessive DO NOT attempt to reverse the reeds to reduce the air gapAlways replace them if damagedCheck each fiber reed for stress marks or missing materialCrankshaft Alignment Fixture (PN 2870710) 1If the runout of the crankshaft is more than .004 (.100mm) on the MAG side, or .006 (.150mm) on the PTO side, the crankshaft must be replacedMAG Side Limit .004 (.1mm) Reed Pedal Clearance .015 (.38 mm) maxExaggerated for illustration PTO Side Limit .006 (.150mm)