2010 Polaris Sportsman 850 Service Manual, Page 111Get this manual
ENGINE Crankshaft Main Journal O.D54.98 mm .01 (2.1646" .0004)
Runout Limit
.001" (.025 mm)
Connecting Rod Journal O.D45.015 mm .01 (1.7722" .0004) Refer to bearing selection procedure and chart on page 5.47