2009 Arctic Cat 150 ATV Service Manual, Page 49Get this manual
11Using an appropriate micrometer or caliper, measure the crankshaft web-to-web widthIf the measurement exceeds specifications, the crankshaft must be repaired or replaced 1Coat the lips of the seal and bearings with gear oil; then using press or suitable driver, install the driveshaft and bearing into the left-side crankcase half
12Check all case bearings for smoothness of rotation, tightness in case, and discolorationIf bearings are loose in the case or discolored, the crankcase assembly must be replaced
2Coat the bearing retainer cap screw threads with blue Loctite #242 and secure the bearing retainersTighten securely