2005-2009 Honda TRX400EX/TRX400X Service Manual, Page 267Get this manual
HYDRAULIC DISC BRAKE Check the brake disc for warpage
SERVICE LIMIT: 0.30 mm (0.012 in )
Check the front wheel hub bearings or rear axle bearings for excessive play, if the warpage exceeds the service limitReplace the brake disc if the bearings are normalFor brake disc replacement, see page 13-14 or 14-6
FRONT MASTER CYLINDER
OISASSEMBLY
Drain the brake fluid from the front brake hydraulic system (page 15-6)When removing ehe Remove the following011 bolecover rhe brake light switch connectors end of the hose to oil bolt and sealing washers preventbrake hose contamination- two bolts