BMW Motorrad F 900 XR, Rider'S Manual

Page: 133 / 261

What are the design
characteristics of the
BMW Motorrad ABS?
The BMW Motorrad ABS en-
sures riding stability on any sur-
face within the limits of riding
physics.
From a speed greater
than 2.5 mph (4 km/h), the
BMW Motorrad ABS can
ensure riding stability on any
surface within the limits of riding
physics. At lower speeds, the
BMW Motorrad ABS cannot
provide optimal support on
all surfaces due to system
limitations.
The system is not optimized for
the special conditions encoun-
tered under the extreme condi-
tions of competitive off-road and
racetrack 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 pe-
riod of time, the ABS function is
switched off for safety reasons,
and an ABS error is displayed.
A self-diagnosis routine must be
completed before the fault mem-
ory entry will be displayed.
Apart from problems with the
BMW Motorrad ABS, unusual rid-
ing conditions can also cause a
fault memory entry to be gener-
ated:
Riding on the rear wheel
(wheelie) for a longer period.
Rear wheel spinning in place
with front wheel brake engaged
(burn out).
Warm-up on the center or aux-
iliary stand at idle or with gear
engaged.
Rear wheel locked-up for a
longer period of time by en-
gine brake, e.g. when riding
downhill on slippery surfaces.
Should a fault memory entry oc-
cur due to an unusual riding con-
dition, the ABS function can be
reactivated by switching the igni-
tion 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.
8
131
z Technology in detail