BMW R 1200 RT Rider's Manual page 120

Invariably, it remains the rider's
6
responsibility to adapt riding
style to riding conditions.
118
Do not take risks that would
negate the additional safety
offered by this system.
Special situations
In accordance with the laws of
physics, the ability to accelerate
is restricted more and more as
the angle of heel increases. Con-
sequently, there can be a per-
ceptible lag in acceleration out of
very tight bends.
The speeds of the front and
z
rear wheels are compared as
one means of detecting the rear
wheel's incipient tendency to
spin or slip sideways. If the sys-
tem registers implausible values
for a lengthy period the ASC
function is deactivated for safety
reasons and an ASC fault mes-
sage is issued. Self-diagnosis
has to complete before fault
messages can be issued.
The following exceptional
riding conditions can lead to
an automatic shutdown of the
BMW Motorrad ASC:
Riding for a lengthy period with
the front wheel lifted off the
ground (Wheelie) with ASC de-
activated.
Rear wheel rotating with the
vehicle held stationary by ap-
plying the front brake (Burn
Out).
Heating up with the motorcycle
on the centre stand or an auxil-
iary stand, engine idling or with
a gear engaged.
Accelerating the motorcycle to
a defined minimum speed after
switching the ignition off and
then on again reactivates the
ASC.
Minimum speed for ac-
tivation of ASC
min 10 km/h
If the front wheel lifts clear of the
ground under severe accelera-
tion, the ASC reduces engine
torque until the front wheel re-
gains contact with the ground.
Under these circumstances,
BMW Motorrad recommends
rolling the throttle slightly closed
so as to restore stability with the
least possible delay.
When riding on a slippery sur-
face, never snap the throttle
twistgrip fully closed without
pulling the clutch at the same
time. Engine braking torque can
cause the rear wheel to lock, with
a corresponding loss of stability.
The BMW Motorrad ASC is un-
able to control a situation of this
nature.