1981-1984 Official Honda ATC250R Shop Manual, Page 212Get this manual
'82 ATC250R ADDENDUM
ATe 250R
LOCK NUT WRENCH 41mm 07916-9180000 OR COMMERCIALLY AVAILABLE
Remove the rear axle nutsRemove the tongued washer and rear brake disc holderWithdraw the axle shaft towards the right
INSPECTION
Place the rear axle in V-blocks and measure the ru outThe actual runout is 12 of the total indicator reading
SERVICE LIMIT: 0.30 mm (0.012 in)
DISC HOLDER