2005 Polaris Sportsman 400/500 Service Manual, Page 96Get this manual
5Measure the connecting rod big end radial clearanceBig End Radial Clearance: Std: .0004-.0015I (.011-.038 mm) Limit: .0020I (.05 mm) 6Inspect the crankshaft main bearing journals for scoring and abnormal wear
PUMP SHAFT OIL SEAL WATER PUMP MECHANICAL SEAL REMOVAL (ENGINE DISASSEMBLED)
NOTE: The water pump mechanical seal can be removed without removing the engineRefer to Water Pump Mechanical Seal InstallationReplace the pump shaft seal and water pump mechanical seal whenever the crankcase is disassembled
CRANKCASE BEARING INSPECTION