1981-1984 Official Honda ATC250R Shop Manual, Page 133Get this manual
ATC 2S0R
BRAKE MECHANISM (FRONT DISC BRAKE)
BRAKE FLUIDAIR BLEEDING
Check the front brake lever free playIf the play is excessive, check the brake pad for wear and bleed air from the brake hydraulic system
FREE PLAY: 15-20 mm (58-34 in)
Remove the cap from the reservoir by removing the attaching screwsRemove the diaphragmCAUTION:
spilling ;n painted lenses or rubber parts as it can cause damage to
RESERVOIR Fill the brake fluid reservoir up to the UPPER LEVEL mark
BLEEDER VALVE
CAUTION:
Do not mix different types of fluid since they are
not compatible
I SPECIFIED BRAKE FLUID: DOT-3