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L.8
BRAKES
Front braking system bleeding (TE)
The braking system must be bled when, due to air in the circuit, the lever stroke
is long and spongy.
To bleed the system:
- Disconnect the brake caliper and position it so that the pipe fitting (pump to
caliper) is perpendicular to the ground.
- Remove the anti-emulsion disc and fill up the tank with new fluid (DOT 4).
- Attach a clear hose to bleed the valve and run into a clear glass container as
shown in figure.
Make sure that the end of the hose is submerged in brake fluid during the
entire bleeding operation.
- Open the bleed valve on the caliper and pump the lever. Allow the pads to
contact the disc.
- During this operation, you'll notice that air bubbles will come out of the brake
pump reservoir. This is normal. Watch the hose. When new, clear fluid,
without bubbles, come out, close the bleed valve.
- Carefully pry the pads apart, using a soft pry bar, forcing them back into the
caliper housing.
Repeat the entire sequence until no bubbles are seen at the hose or in
reservoir.
Reassemble the front disc brake guard in the reverse order as was shown for
dismalting.
WARNING: During bleeding the motorcycle handle bar
must be turned left. Thus, the pump tank will be higher,
making easier the braking system bleeding.
N.B. Should the motorcycle, due to a fall during a
competition or shop repairs, feature some elasticity of the
brake lever stroke, with a subsequent braking efficiency
decrease, you'll have to repeat the circuit bleeding as
above described.
A screw to increase or decrease the clearance between
lever and pump cylinder is contained in the brake lever:
this adjustment is subjective and you'll use it according to
your requirements.
Front braking system bleeding (SMR)
Bleed the braking circuit when the lever stroke gets stretchy due to the presence
of air inside the circuit.
Work as follows:
- Remove the caliper and fit a 4 mm shim in place of the disc, fastening it by an
elastic;
- Fit the caliper and the pipe fastening unit perpendicular to the ground, and
support it conveniently;
- Remove pump cap (1) on the handlebar and fill up with the new fluid DOT4;
- Fit a transparent plastic pipe on the bleed valve of the caliper and plunge the
other end of the pipe into a basin (check to make sure that, during the whole
operation, the end of the pipe is fully plunged into the fluid);
- Open the bleed valve on the caliper and move the lever several times until the
fluid, clear and without bubbles, comes out of the pipe; now close the bleed
valve;
- Reassemble the pump cap on the handlebar and the brake caliper;
- Remove the brake pump from the handlebar and place it in vertical position,
in line with the piping;
- Reassemble the pump on the handlebar, carry our another bleeding action, fill
up with fluid, and tighten the valve on the caliper to the prescribed torque.
As the braking fluid is a very corrosive substance, in the
case it comes in contact with your eyes wash them
abundantly with water.
During the bleeding of the braking circuit keep the
handlebar turned leftwards. This is the way to lift the
pump tank and to make easier the bleeding of the braking
system.
If the lever stroke gets stretchy and the braking action
results as poor in the case of falls during competitions, or
after repair work in shops, repeat the bleeding operation
described above.
As the bleeding operation does not fully eliminate the air
inside the circuit, the small quantity of air remaining inside
will be eliminated after a short time of use of the brake. In
this case however, the action of the lever will be harder
and the stroke shorter.
N° 8000A2943 (09-03)
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