BMW R 1200 ST Rider's Manual page 84

If the brakes are applied un-
5
der these circumstances the
ABS has to reduce braking
82
force to ensure that direc-
tional stability is maintained
when the wheels regain con-
tact with the road surface.
At this instant the BMW Mo-
torrad Integral ABS must as-
sume an extremely low coef-
z ficient of friction, so that the
wheels will continue to rotate
under all imaginable circum-
stances, because this is the
precondition for ensuring dir-
ectional stability. As soon as
is registers the actual circum-
stances, the system reacts
instantly and adjusts braking
force accordingly to achieve
optimum braking.
What feedback does the
rider receive from the
BMW Motorrad Integral
ABS?
If the ABS system has to re-
duce braking force on ac-
count of the circumstances
described above, vibration is
perceptible through the hand-
brake lever.
When the handbrake lever is
pulled, brake pressure is also
built up at the rear wheel by
the integral function. If the
brake pedal is depressed
after the handbrake lever is
pulled, the brake pressure
built up beforehand is per-
ceptible as counter-pressure
sooner than is the case when
the brake pedal is depressed
either before or at the same
time as the brake lever is
pulled.
How can stopping
distance be minimised?
Each time the brakes are
applied, a load distribution
shift takes place with the
load shifting forward from
the rear to the front wheel.
The sharper the motorcycle
decelerates, the more load
is shifted to the front wheel.
The higher the wheel load, the
more braking force can be
transmitted without the wheel
locking.
To optimise stopping dis-
tance, apply the front brakes
rapidly and keep on increas-
ing the force you apply to the
brake lever. This makes the
best possible use of the dy-
namic increase in load at the
front wheel. Remember to
pull the clutch at the same
time. In the "panic braking
situations" that are trained so
frequently braking force is ap-