Table of Contents
Advertisement
PERIOOIC MAINTENANCE ANa TUNE·UP PROCEDURES
2·12
BLEEDING AIR FROM TH
E
BRAKE flUID CIRCUIT
Air
trapped
in the flu id
circuit
acts like a
cushion
to abso rb
a large
p roportion of the pressure developed. by the
mast
er
cylinder
and thus interferes with the full braking performance
of
the
brake caliper
.
The presence
of
air is
indicated
by
"sponginess" of
the
brake
lever and
also
by
lack of
brak-
ing
force
.
Considering
the danger to which
such
trapped
air
exposes
the machine
and
rider,
it
is
essential
that.
after
re-
mounting the brake and restoring the brake
system
to the
normal
condition.
the brake
fl
uid
ci rcuit
be purged
of
air
in
the following
manner:
•
Fill
up
the master
cylinder
reservoir to the
upper
end of
the
inspection
window (for front
brake)
and upper line
(for
rear brake)
.
Replace the reservoir
cap
to prevent
en-
try
of
dirt.
•
Attach
a
pipe to the
caliper bleeder valve, and insert
the
free end of
the pipe
into a
receptacle
.
•
Squeeze
and
release the
brake lever
several
times
in
rapid
successio n,
and
squeeze
the
lever
fu
ll
y without
releas-
ing
it.
Loosen the bleeder valve by turning
it
a
quarter
of a
turn
so
that the brake fluid runs
into
the receptacle:
this
will remove
the tension
of
the brake
lever causing
it to touch the
handlebar
grip.
Then
,
close
the
valve
,
pump
and squeeze
the
lever, and open
the
valve
.
Repeat this
process until the
fluid
flowing
into
the receptacle no
longer
contains air bubbles
.
NOTE:
Replenish the brake fluid reservoir
as
necessary while
bleed-
ing
the brake
system.
Make
sure
that
there is always some
fluid visible
in
the
•
reservo".
•
Close
the bleeder
valve
.
and
disconnect the pipe
.
Fi
ll
the
reservoir
to
t
he upper
end of
the inspection window (for
front
b
rake)
and
upper line
(for
rear
brake)
.
•
Rear brake
:
Differences between
fron
t
and
rear are that
the
master cylinder
is
actuated
by
a
pedal.
Bleed er v
alve
Tightening
torqu
e:
6
-
9
N 'm
(0 .6
-
0 .9 kg-m
.
4 .5
-
6 .5 Ib-Itl
CAUTION
:
Handle the
brake
fluid
with
ca re:
the fluid
reacts
chemical
-
ly with
paint. plastics.
rubber
materials.
etc
.
.""'if
•
•
- Quick Links:
- Specificatlons
- Engine Oil/Filter/Strainer
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
