2003-2005 Suzuki LT-A500F Service Manual, Page 269Get this manual
CHASSIS
BRAKE FLUID REPLACEMENT
Place the vehicle on level surfaceRemove the seat and fuel tank covers(7-4 and 7-5) Remove the master cylinder reservoir cap and diaphragmSuck up the old brake fluid as much as possibleFill the reservoir with new brake fluid
Specification and classification: DOT 4