2004 Polaris Freedom, Virage, Genesis and MSX-140 Service Manual., Page 110Get this manual
ENGINECOOLING SYSTEMS Engine InspectionAll Engines 1Position each piston ring 12I (1.3 cm) from the top of the cylinder using the piston to push it squarely into placeMeasure installed gap with feeler gauge at both the top and bottom of the cylinderNOTE: difference in end gap indicates cylinder taperThe cylinder should be measured for excessive taper and out of roundReplace rings if the installed end gap exceeds the service limitNOTE: Always check piston ring installed gap after reboring cylinder or when installing new ringsPiston Ring Installed Gap STD: .014 -.019 (.36.48mm) Service Limit: .028 (.71mm)
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