2003 Polaris MSX 140 Personal Watercraft Service Manual, Page 69Get this manual
EngineCooling W120HO- DFI Engine Inspection Crankshaft Main Bearing Inspection
1Clean crankshaft thoroughly and oil main and connecting rod bearings with Polaris Premium cycle engine oilCarefully check each main bearing on the shaftNOTE: Due to extremely close tolerances, the bearings must be inspected visually, and by feelLook for signs of discoloration, scoring or gallingTurn the outer race of each bearingThe bearings should turn smoothly and quietlyThe inner race of each bearing should fit tightly on the crankshaftThe outer race should be firm with minimal side to side movement and no detectable up and down movementReplace any loose or rough bearings
Connecting Rod (Big End) Side Clearance
1Measure connecting rod big end side clearance with feeler gaugeCompare to specifications
Connecting Rod Big End Side Clearance Standard: .014.020 (.36-.51mm) Service Limit: .022 (.56mm)