Brake System With Bmw; Motorrad Abs Oe - BMW F 800 ST 2007 Rider's Manual

Dirt or mud on brakes
5
When riding on loose
surfaces or muddy
70
roads, the brakes may fail
to take effect immediately
because of dirt or moisture on
the discs or brake pads.
Apply brakes in good time
until the brakes have been
cleaned.
z
The brake pads will wear
more rapidly if you ride
frequently on unsurfaced
tracks or poor roads.
Check the thickness of the
brake pads more frequently
and replace the brake pads in
good time.
Brake system with
BMW Motorrad ABS
How does ABS work?
The amount of braking force
that can be transferred to
the road depends on factors
hat include the coefficient of
friction of the road surface.
Loose stones, ice and snow
or a wet road all have much
lower coefficients of friction
than a clean, dry asphalt sur-
face. The lower the coeffi-
cient of friction, the longer the
braking distance.
If the rider increases braking
pressure to the extent that
braking force exceeds the
maximum transferrable limit,
the wheels start to lock and
the motorcycle loses its dir-
ectional stability; a fall is im-
minent. Before this situation
can occur, ABS intervenes
and adapts braking pressure
to the maximum transferrable
braking force, so the wheels
OE
continue to turn and direc-
tional stability is maintained
irrespective of the condition of
the road surface.
What are the effects of
surface irregularities?
Humps and surface irregu-
larities can cause the wheels
to lose contact temporarily
with the road surface; if this
happens the braking force
that can be transmitted to
the road can drop to zero. If
the brakes are applied under
these circumstances the ABS
has to reduce braking force
to ensure that directional sta-
bility is maintained when the
wheels regain contact with
the road surface. At this in-
stant the BMW Motorrad ABS
must assume an extremely
low coefficient of friction, so