1985-1986 Honda ATC250R Shop Manual, Page 196Get this manual
HYDRAULIC DISC BRAKES
BRAKE FLUID REPLACEMENT BLEEDING
BRAKE FLUID DRAINING contaminated brake disc or pad reduces stopping powerDiscard contaminated pads and clean contaminated disc with high Quality brake degreasing agentCAUTION
RESERVOIR COVER
Do not allow foreign material to enter the system when filling the reservoir Avoid spilling fluid on painted, plastic, or rubber partsPlace rag over these parts whenever the system is servicedWith the fluid reservoir parallel to the ground, remove the reservoir cover and diaphragm