2007 Arctic Cat Four-Stroke Factory Service Manual, Page 429Get this manual
5Remove the cap screw and lock nut securing the rear arm to the idler armAccount for the aluminum axle and bushing assemblies ARemove the wheel insert (if applicable) and the snap ringBUsing hydraulic press, press the bearing out the inside of the wheelCPress the new bearing (on its outer race) into the idler wheel
DInstall the snap ring making sure the "sharp side" is directed away from the bearing
CLEANING AND INSPECTING
! NOTE: Whenever part is worn excessively, cracked, or damaged in any way, replacement is necessary