1981-1984 Official Honda ATC250R Shop Manual, Page 91Get this manual
ATe 250R SHIFTFORKSHIFT FORK SHAFT SHIFT DRUM INSPECTION
Check each shift fork for wear, bending or any other damageMeasure the I.Dand shift claw thicknessSERVICE LIMITS: Claw thickness: I.D 5.30mm (0.209 in) 12.050 mm (0.474 in)
KICKSTARTERTRANSM ISSIONCRANKSHAFT
Check the shift fork shaft for wear, damage or bendingMeasure the O.DSERVICE LIMIT: 11.950 mm (0.470 in)