2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 209Get this manual
FRONT AND REAR WHEELS
2Check: wheel bearings Wheel hub playwheel turns roughlyReplaceaClean wheel hub exteriorbDrive bearing out by pushing spacer aside and tapping around perimeter of bearing inner raceUse soft metal drift punch and "floats" between hammerThe spacer bearingsRemove both bearings as described
WARNING
Eye protection is recommended when using striking toolscTo install the wheel bearings, reverse the above sequenceUse socket that matches outside diameter of bearing outer race to drive in bearing