2003 Polaris ATV Trail Boss 330 Factory Service Manual, Page 75Get this manual
ENGINE 2Use feeler gauge to measure the connecting rod big end side clearance2Measure the width of the connecting rod at the big end
Connecting Rod Width: Std: .8233-.8252I (20.88-20.93 mm)
3Visually inspect bearing journal for scoring, damage or excessive wearReplace crankshaft if it fails visual inspection4Measure the O.Dof the crankshaft rod journal in four places and in two directions away from the oil holeReplace the crankshaft if it measures below the service limit, or if the journal is out of round
Connecting Rod Big End Side Clearance: Std: .0028-.0118 (0.07-0.30 mm) Limit: .0138 (.35 mm) 3If the clearance exceeds the service limit, either the crankshaft, connecting rod or both need to be replacedRefer to Stepsunder crankshaft inspection to determine which part(s) are outside of specificationsNOTE: Markings on connecting rod and cap that must be aligned for assemblyIf marks are not clearly visible, mark the rod and cap with permanent marker4Remove the connecting rod nuts and connecting rod bearing capNOTE: It may be necessary to lightly tap on the side of the cap with plastic mallet to loosen it