Trapped air in the braking system may a cause a reduction in braking efficiency
leading to loss of motorcycle control and an accident.
When disconnecting the brake hose from the master cylinder it is necessary to keep
the open end of the hose above the handlebars.
Allowing the brake hose to fall below the handlebar height will allow an excessive
amount of air to enter into the brake system.
Trapped air may cause the brake lever to feel spongy and contribute to reduced
braking efficiency.
The master cylinder back bleed is to be used when a brake master cylinder or ABS
modulator has been removed from the braking system and then refitted or replaced.
The front caliper should be detached from the motorcycle with the pistons pumped
out against a suitable flat metal plate as described in Front Brake Master Cylinder -
Removal.
1. Depress the brake lever to the handlebar. This will make sure the reservoir port is
closed and brake fluid flows to the bleed screw.
Make sure no damage is made to the brake pad material when moving the brake
pads.
Allowing the brake pads to come into contact with each other or sharp objects may
cause the material to crack or break.
Damage to the brake pads may result in reduced braking efficiency leading to loss of
motorcycle control and an accident.
2. Being careful not to damage the brake pad material, use the metal plate against the
brake pads to push the caliper pistons in evenly.
3. Push the pistons into the caliper to apply pressure to the system.
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