1998-2004 Honda Foreman 450 factory service manual, Page 280Get this manual
BRAKE SYSTEM Measure the brake drum 1.0
SERVICE LIMIT: 161 mm (6.34 in)
Remove the following:Wheel hub and O-ringDust seal For front brake waterproof seal inspectionreplacement, see page 14-11
Measure the brake lining thickness
SERVICE LIMIT: 2.0 mm (0.08 in)
For brake panel inspection, see page 14-10