BMW S 1000RR Rider's Manual page 145

In what ways is the
BMW Motorrad Race ABS
noticeable to the rider?
If the ABS has to reduce the
braking force due to the cir-
cumstances described above,
vibrations can be felt through the
brake lever.
If the brake lever is operated,
braking pressure is also built up
at the rear wheel via the integral
function. If the footbrake lever is
not operated until afterwards, the
brake pressure already built up
is noticeable as counterpressure
earlier than when the footbrake
pedal is operated before or at the
same time as the brake lever.
Lifting off rear wheel
Even during severe braking, a
high level of tire grip can mean
that the front wheel does not
lock up until very late, if at all.
Consequently, ABS does not in-
tervene until very late, if at all.
Under these circumstances the
rear wheel can lift off the ground,
and the outcome can be a high-
siding situation in which the mo-
torcycle can flip over.
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.
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 an extended
period of time, the ABS function
is deactivated for safety reasons
and an ABS fault is indicated. A
self-diagnosis routine must be
completed before the error will
be displayed.
Apart from problems on the
BMW Motorrad Race ABS,
unusual riding conditions can
also cause a fault message to be
generated.
Unusual riding conditions:
Heating up on an auxiliary
stand at idle speed or with gear
engaged.
Rear wheel locked-up for a
longer period of time by engine
brake, e.g. when riding down
steep hills.
Should a fault code result due to
one of the driving conditions de-
scribed above, the ABS function
can be reactivated by switching
the ignition off and then on again.
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