2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 413Get this manual
BRAKE SYSTEM
TROUBLESHOOTING
FRONT DISC BRAKE
Brake lever soft or spongy Air in hydraulic system Leaking hydraulic system
Contaminated brake paddisc
Worn caliper piston seal Worn master cylinder piston cups Worn brake paddisc Contaminated caliper Caliper not sliding properly Low brake fluid level Clogged fluid passage Warpeddeformed brake disc Stickingworn caliper piston Stickingworn master cylinder piston Bent brake lever