Honda CBR650F Service Manual page 323

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HYDRAULIC BRAKE
SERVICE INFORMATION
HYDRAULIC BRAKE
GENERAL
Frequent inhalation of brake pad dust, regardless of material composition, could be hazardous to your health.
• Avoid breathing dust particles.
• Never use an air hose or brush to clean brake assemblies. Use an OSHA-approved vacuum cleaner.
Spilling brake fluid will severely damage instrument lenses and painted surface. It is also harmful to some rubber parts. Be careful
whenever you remove the reservoir cover; make sure the front reservoir is horizontal first.
• This section covers service of the conventional brake components of the brake system. For Anti-lock Brake System (ABS;
CBR650FA, CB650FA) service (page 19-2).
• The CBR650FA, CB650FA models are equipped with the ABS, however, the brake fluid replacement procedure is performed in
the same manner as in the ordinary air bleeding procedure. Note that replacement and bleeding air from the brake fluid in the
ABS modulator is not necessary, as it sealed in the modulator.
• A contaminated brake disc or pad reduces stopping power. Discard contaminated pads and clean a contaminated disc with a
high quality brake degreasing agent.
• Always use fresh DOT 4 brake fluid from a sealed container when servicing the system. Do not mix different types of fluid, they
may not be compatible.
• Never allow contaminates (dirt, water, etc.) to get into an open reservoir.
• Once the hydraulic system has been opened, or if the brake feels spongy, the system must be bled.
• Always check brake operation before riding the motorcycle.
• CBR650FA, CB650FA: When the wheel speed sensor is removed, be sure to check the air gap between the wheel speed
sensor and pulser ring after installing it (page 19-21).
TROUBLESHOOTING
Brake lever/pedal soft or spongy
• Air in hydraulic system
• Leaking hydraulic system
• Contaminated brake pad/disc
• Worn caliper piston seal
• Worn master piston cups
• Worn brake pad/disc
• Contaminated caliper
• Contaminated master cylinder
• Caliper not sliding properly
• Low brake fluid level
• Clogged fluid passage
• Warped/deformed brake disc
• Sticking/worn caliper piston
• Sticking/worn master piston
• Bent brake lever/pedal
Brake lever/pedal hard
• Clogged/restricted fluid passage
• Sticking/worn caliper piston
• Caliper not sliding properly
• Worn caliper piston seal
• Sticking/worn master piston
• Bent brake lever/pedal
Brake drags
• Contaminated brake pad/disc
• Misaligned wheel
• Badly worn brake pad/disc
• Warped/deformed brake disc
• Caliper not sliding properly
• Clogged/restricted fluid passage
• Sticking caliper piston
18-2