BMW R1200GS Rider's Manual page 106

Rear wheel lift
6
Under very severe and sudden
deceleration, however, under cer-
104
tain circumstances it is possible
that the BMW Motorrad Integ-
ral ABS will be unable to prevent
the rear wheel from lifting clear
of the ground. If this happens
the outcome can be a highsiding
situation in which the motorcycle
can flip over.
Severe braking can cause
the rear wheel to lift off the
ground.
When you brake, bear in mind
that ABS control cannot always
z
be relied on to prevent the rear
wheel from lifting clear of the
ground.
What is the design
baseline for
BMW Motorrad Integral
ABS?
Within the limits imposed by
physics, the BMW Motorrad In-
tegral ABS ensures directional
stability on any surface. The sys-
tem is not optimised for special
requirements that apply under
extreme competitive situations
off-road or on the track. The
driving behaviour should be ad-
apted to actual driving skills and
the road conditions.
Special situations
The speeds of the front and rear
wheels are compared as one
means of detecting a wheel's
incipient tendency to lock. If
the system registers implaus-
ible values for a lengthy period,
the ABS function is deactivated
for safety reasons and an ABS
fault message is issued. Self-dia-
gnosis has to complete before
fault messages can be issued.
In addition to problems with the
BMW Motorrad Integral ABS,
exceptional riding conditions can
lead to a fault message being
issued:
Heating up with the motorcycle
on the centre stand or an auxil-
iary stand, engine idling or with
a gear engaged
Rear wheel locked by the en-
gine brake for a lengthy period,
for example while descending
on a loose or slippery surface.
If a fault message is issued on
account of exceptional riding
conditions, you can reactivate
the ABS function by switching
the ignition off and on again.