1989 Honda FL400R Pilot Service Manual, Page 203Get this manual
INSPECTION Check the caliper cylinder for scoring, scratches or other damageMeasure the caliper cylinder IO
SERVICE LIMIT: 42.91 mm (1.689 in)
Measure the caliper piston 0.0
SERVICE LIMIT: 42.76 mm (1.683 in)
Remove the parking brake bolts and parking brake baseRemove the O-ring from the parking brake baseRemove the boot and parking brake shaftCheck the parking brake shaft for wear or damage