1981-1984 Official Honda ATC250R Shop Manual, Page 254Get this manual
'83 ATC250R ADDENDUM
SWING ARM
Remove the swing arm pivot nut and withdraw the pivot boltRemove the swing arm
INSPECTION
Check the swing arm for damage and replace if necessaryInspect the swing arm bearings and bushings and replace them if they are wornBall Bearing ReplacementNOTE: The drive chain adjuster does not have to be removed from the swing arm for bearing replacementIf the adjuster is removed the sealing rings will be damaged and will require replacementDrive out the ball bearings with drift and remove the center collarPress the right ball bearing in until it seats fully using the tools shownInstall the center collar into the swing armInstall the left ball bearing using the same tools used to install the right bearingWhen the attachment bottoms against the swing arm, remove the attachment and driverThen finish pressing the bearing in until it seats (about mm) with driver 07947-1310000
PIVOT NUT
DRIVER,07749-0010000