Honda CBR125RW - Service manual > Hydraulic Brake

COMPONENT LOCATION

SERVICE INFORMATION

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 cap; make sure the front reservoir is horizontal first.

• A contaminated brake disc or pad reduces stopping power. Discard contaminated pads and clean a contaminated disc with a high quality brake degreasing agent.
• Check the brake system by applying the brake lever or pedal after the air bleeding.
• 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 use fresh DOT 3 or DOT 4 brake fluid from a sealed container when servicing the system. Do not mix different types of fluid, they may not be compatible.
• Always check brake operation before riding the motorcycle

SPECIFICATIONS

TORQUE VALUES

Brake caliper bleed valve 5.4 N-m (0.6 kgf-m, 4.0 lbf-ft)
Reservoir cover screw 1.5 N-m (0.2 kgf-m, 1.1 lbf-ft)
Front brake caliper mounting bolt 30 N-m (3.1 kgf-m, 22 lbf-ft) ALOC: replace with a new one.
Front brake light switch screw 1.2 N-m (0.1 kgf-m, 0.9 lbf-ft)
Brake lever pivot bolt 1.0 N-m (0.1 kgf-m, 0.7 lbf-ft)
Brake lever pivot nut 5.9 N-m (0.6 kgf-m, 4.4 lbf-ft)
Brake hose oil bolt 34 N-m (3.5 kgf-m, 25 lbf-ft)
Brake pad hanger pin 17 N-m (1.7 kgf-m, 13 lbf-ft)
Rear master cylinder push rod lock nut 17 N-m (1.7 kgf-m, 13 lbf-ft)
Rear master cylinder hose joint screw 1.5 N-m (0.2 kgf-m, 1.1 lbf-ft) Apply locking agent to the threads.
Step holder mounting bolt 27 N-m (2.8 kgf-m, 20 lbf-ft)
Step bar mounting bolt 10 N-m (1.0 kgf-m, 7 lbf-ft)
Brake caliper pin bolt 17 N-m (1.7 kgf-m, 13 lbf-ft)
Brake caliper torque nut 22 N-m (2.2 kgf-m, 16 lbf-ft) Apply locking agent to the threads.

TOOL

TROUBLESHOOTING

Brake lever/pedal soft or spongy

• Air in hydraulic system
• Leaking hydraulic system
• Contaminated brake pad/disc
• Worn caliper piston seal
• Worn master cylinder 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 cylinder piston
• Bent brake lever/pedal

Brake lever/pedal hard

• Clogged/restricted hydraulic system
• Sticking/worn caliper piston
• Caliper not sliding properly
• Worn caliper piston seal
• Sticking/worn master cylinder 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 hydraulic system
• Sticking/worn caliper piston
• Clogged master cylinder port
• Sticking master cylinder piston

• Brake Fluid Replacement/ Air Bleeding
• Front/Rear Master Cylinder
• Front/Rear Brake Caliper

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