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General instructions
7
More information on the topic of
technology is available at:
76
bmw-motorrad.com/technol-
ogy
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
poorer friction coefficient than a
z
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
brake force is exceeded when
the driver increases the brake
pressure, the wheels begin to
lock and driving stability is lost.
A fall can occur. Before this
situation occurs, ABS intervenes
and adjusts the brake pressure
to the maximum transferable
braking force. This enables
the wheels to continue to turn
and maintains driving stability
regardless of the road surface
condition.
What happens when
rough roads are
encountered?
Bumpy or rough roads can briefly
lead to a loss of contact between
the tires and the road surface,
until the transferable braking
force is reduced to zero. If brak-
ing is carried out in this situa-
tion, the ABS reduces the brake
pressure to ensure driving sta-
bility when restoring contact to
the road. At this point in time,
the BMW Motorrad ABS must
assume extremely low friction
coefficients (gravel, ice, snow)
so that the road wheels turn in
every imaginable case and the
driving stability is ensured. After
detecting the actual conditions,
the system adjusts the optimum
brake pressure.
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
intervene 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 Maxi-Scooter 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-
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