BMW C 650 GT Rider's Manual page 83

WARNING
Lifting off of the rear wheel
due to heavy braking
Accident hazard
When braking heavily, bear in
mind that the ABS control can-
not always be relied on to pre-
vent the rear wheel from lifting
off the ground.
What are the design
characteristics of the
BMW Motorrad ABS?
The BMW Motorrad ABS en-
sures driving stability on any
surface within the limits of driv-
ing physics. The system is not
optimized for the special condi-
tions encountered under extreme
weather during off-road and race-
track use.
Special situations
To detect the tendency of the
wheels to lock up, the speeds
of the front and rear wheel are
compared. If implausible values
are detected over a longer period
of time, the ABS function is de-
activated for safety reasons and
an ABS error is indicated. A self-
diagnosis routine must be com-
pleted before the error will be
displayed.
Apart from problems on the
BMW Motorrad ABS, unusual
riding conditions can also cause
a fault message to be generated.
Unusual riding conditions:
With ASC switched off: rid-
ing for a lengthy period with
the back wheel lifted off the
ground (wheelie)
Rear wheel rotating with the
vehicle held stationary by ap-
plying the front brake (burn-
out).
Rear wheel skidding on a slip-
pery surface for a lengthy pe-
riod, for example deceleration
using the engine's braking ef-
fect.
Should a fault code occur due to
an unusual driving condition, the
ABS function can be reactivated
by switching the ignition off and
then on again.
How important is regular
maintenance?
WARNING
Brake system not regularly
serviced
Accident hazard
To ensure that the
BMW Motorrad ABS is in a
properly maintained condition,
it is vital that the specified
service intervals are kept to.
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