2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 324Get this manual
BRAKE SYSTEM
BRAKE FLUID REPLACEMENTAIR BLEEDING
Do not allow foreign material to enter the system when filling the reservoir Use only Honda DOT brake fluid from sealed container Do not mix different types of fluidThey are not compatible
BRAKE FLUID DRAINING
With the fluid reservoir parallel to the ground, remove the reservoir cover, diaphragm plate and diaphragmSCREWS