BMW R 1200 ST -, Rider'S Manual

Page: 87 / 166

under extreme competitive
situations off-road or on the
track. You have the option
of deactivating the BMW Mo-
torrad ASC system for these
circumstances.
Even ASC is constrained
by the laws of physics.
Invariably, the rider bears re-
sponsibility for assessing road
and traffic conditions and ad-
opting his or her style of rid-
ing accordingly.
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 ac-
celerate is restricted more
and more as the angle of heel
increases. Consequently,
there can be a perceptible
lag in acceleration out of very
tight bends.
The speeds of the front and
rear wheels are compared as
one means of detecting the
rear wheel's incipient tend-
ency to spin or slip sideways.
If the system registers im-
plausible values for a lengthy
period the ASC function is
deactivated for safety reasons
and an ASC fault message is
issued. Self-diagnosis has to
complete before fault mes-
sages can be issued.
The BMW Motorrad ASC can
shut down automatically un-
der the exceptional riding
conditions outlined below.
Exceptional riding
conditions:
Riding for a lengthy period
with the front wheel lifted
off the ground (wheelie) and
ASC deactivated.
Rear wheel rotating with the
motorcycle held stationary
by applying the front brake
(burn-out).
Heating up with the motor-
cycle on the centre stand
or an auxiliary stand, en-
gine idling or with a gear
engaged.
Accelerating the motorcycle
to a speed in excess of 10
km/h after switching the ig-
nition off and then on again
reactivates the ASC.
If the front wheel lifts clear of
the ground under severe ac-
celeration, the ASC reduces
engine torque until the front
wheel regains 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.
5
85
z Riding
ProCarManuals.com