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GENERAL TECHNICAL INFORMATION
2.2.6
FRONT BRAKE
BLEEDING
Any air trapped in the hydraulic circuit will act as a cushion
and take up most of the pressure applied by the master
cylinder; this will impair the operation of the brake callipers
and reduce braking efficiency.
A spongy feel of the brake lever and loss of braking mean
that there is air in the circuit.
DANGER
This is a dangerous condition that makes the
vehicle unsafe to ride; each time the brakes are
removed, it is essential to bleed the hydraulic
circuit once the brakes have been refitted and
the brake system is back to normal operating
conditions.
NOTE The following procedure applies to both front brake
callipers. Place the vehicle on level ground before beginning
the bleeding procedure. While bleeding the hydraulic circuit,
top up the reservoir with brake fluid as required. Ensure that
there is always some fluid in the reservoir throughout the
process.
•
Remove the rubber cap from bleeding valve and the
reservoir plug.
•
Insert one end of a transparent plastic tubing inside the
front brake calliper bleed valve and the other end in a
container.
•
Turn the handlebar to the left, quickly pull and release
several times the front brake lever, and keep it
completely pulled.
•
Slacken the bleed valve by 1/4 of a turn to let the brake
fluid drain into the container; this will remove any
tension from the lever and help it travel fully home.
•
Retighten the bleed valve before the lever is fully
squeezed in.
•
Repeat this process until the fluid draining into the
container is totally clear of air bubbles.
NOTE While bleeding the hydraulic circuit, top up the
reservoir with brake fluid as required. Ensure that there is
always some fluid in the reservoir throughout the process.
•
Tighten the bleed valve and remove the tubing.
•
Add brake fluid to the reservoir until the fluid has
reached the correct level.
•
Refit the rubber cap.
CHANGING THE PADS
•
Remove the vibration damping plate and move the
pistons apart.
•
Turn the pins and slide out both split pins.
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Griso V1100
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