1989 Honda FL400R Pilot Service Manual, Page 195Get this manual
Remove the wheel cylinder and adjuster by removing each boltsClean off any sealant material from the cylinderadjusterbolts and brake panel ADJUSTER INSPECTION
Inspect the adjuster body and adjuster nuts for wear or damageCheck the lock spring and O-rings for fatigue or damage
WHEEL CYLINDER INSPECTION
CAUTION Clean all parts thoroughly with the clean brake fluid Blowout all passages with compressed air