1981-1984 Official Honda ATC250R Shop Manual, Page 198Get this manual
'82 ATC250R ADDENDUM BRAKE FLUID AIR BLEEDING Check the fluid level with the fluid reservoir parallel to the roundRefer to page -9CAUTION: Install the diaphragm on the reservoir when operating the brake pedalFailure to do so will allow brake fluid to squirt out of the reservoir during brake operationUPPER LEVEL
ATe 250R
Avoid spilling fluid on painted surfaces Do not mix different types of fluid in the reservoirMixing different types may not provide optimum braking performance
LOWER LEVEL