2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 325Get this manual
BRAKE SYSTEM Connect commercially available brake bleeder to the bleed valvePump the brake bleeder and loosen the bleed valve, adding fluid when the fluid level in the master cylinder reservoir is low Check the fluid level often while bleeding the brakes to prevent air from being pumped into the system When using brake bleeding tool, follow the manufacturer's operating instructionsBRAKE BLEEDER
Repeat the above procedures until air bubbles do not appear in the plastic hose If air is entering the bleeder from around the bleed valve threads, seal the threads with Teflon tape If brake bleeder is not available, fill the master cylinder and operate the brake lever to fill the systemClose the bleed valveNext, perform the available BLEEDING procedure (see below)