BMW 2013 F800GT, Rider'S Manual

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Brake system with
BMW Motorrad ABS
How does the ABS work?
The maximum braking force that
can be transferred to the road
surface is partially dependent on
the friction coefficient of the road
surface. Gravel, ice, snow and
wet roads offer a considerably
lower friction coefficient than a
dry, clean asphalt surface. The
poorer the friction coefficient of
the road surface is, the longer
the braking distance will be.
If the maximum transferable brak-
ing force is exceeded when the
rider increases the brake pres-
sure, the wheels begin to lock
and driving stability is lost, and
a fall can result. Before this sit-
uation occurs, ABS is activated
and the brake pressure is ad-
justed to the maximum transfer-
able braking force. This enables
the wheels to continue to turn
and maintains driving stability re-
gardless of the road surface con-
dition.
What happens when
rough roads are
encountered?
Rough roads can briefly lead to
a loss of contact between the
tires and the road surface. The
transferable braking force is then
reduced to zero. If braking is car-
ried out in this situation, ABS
must reduce the brake pressure
to ensure driving stability when
restoring contact to the road.
At this point in time, ABS must
assume extremely low friction
coefficients (gravel, ice, snow)
so that the wheels turn in every
imaginable case and driving sta-
bility is ensured. After detecting
the actual conditions, the system
adjusts the optimum brake pres-
sure.
Lifting off rear wheel
During extremely heavy and rapid
decelerations it is possible that
the ABS cannot prevent the rear
wheel from lifting off the ground.
In these cases, the motorcycle
can also flip end over end.
Heavy braking can lead to
the rear wheel lifting off the
ground.
When braking, bear in mind
that the ABS control cannot
always be relied on to prevent
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 sur-
face within the limits of driving
physics. The system is not op-
timized for special requirements
resulting under extreme weather
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z Technology in detail