BMW F800GT Rider's Manual page 91

WARNING
Rear wheel lift due to severe
braking
Risk of falling
When you brake sharply, bear
in mind that ABS control can-
not always be relied on to pre-
vent the rear wheel from lifting
clear of the ground.
What is the design
baseline for
BMW Motorrad ABS?
Within the limits imposed by
physics, the BMW Motorrad ABS
ensures directional stability on
any surface. The system is not
optimised for special require-
ments that apply under extreme
competitive situations off-road or
on the race course.
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 ABS, exceptional
riding conditions can also cause
a fault message to be issued:
Riding for a lengthy period with
the front wheel lifted off the
ground (wheelie).
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.
Rear wheel locked for a lengthy
period, for example while des-
cending off-road.
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.
How important is regular
maintenance?
WARNING
Brake system not regularly
serviced.
Risk of accident
In order to ensure that the ABS
is always maintained in op-
timum condition, it is essen-
tial for you to comply strictly
with the specified inspection
intervals.
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