2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 285Get this manual
BRAKE SYSTEM Remove the bracket pin, boot and pad springs from the caliper bracketRemove the caliper pin and boot from the caliper bodyPIN AND BOOT PAD SPRINGS
CALIPER PIN AND BOOT Place shop towel over the pistonDo not use high Position the caliper body with the piston down and pressure air or bring apply small squirts of air pressure to the fluid inlet the nozzle too close to remove the pistonto the inlet