BMW Motorrad R 18, Rider'S Manual

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What are the design characteristics of the
BMW Motorrad ABS?
The BMW Motorrad ABS ensures riding sta-
bility on any surface within the limits of rid-
ing 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.
Special situations
To detect the tendency of the wheels to
lock up, the speeds of the front and rear
wheel are compared. If the system regis-
ters implausible data for an extended period
of time, it will switch off the ABS as safety
precaution and a display will alert you to an
ABS error. A self-diagnosis routine must be
completed before the fault memory entry
will be displayed.
Apart from problems with the
BMW Motorrad ABS, unusual riding
conditions can also cause a fault memory
entry to be generated:
Warming up the engine on an auxiliary
stand at idle or with gear engaged.
Rear wheel locked-up for a longer period
of time by engine brake, e.g. when riding
downhill on slippery surfaces.
Should a fault memory entry occur due to an
unusual riding 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 inter-
vals are kept to.
Reserves for safety
The potentially shorter stopping distances
which BMW Motorrad ABS permits must not
be used as an excuse for a careless driving
style. ABS is primarily a means of ensuring a
safety margin in genuine emergencies.
WARNING
Braking in curves
Risk of accident despite ABS
The rider is always responsible for
adapting his/her driving style.
Do not reduce the additional safety
function with careless riding or
unnecessary risks.
AUTOMATIC STABILITY CONTROL (ASC)
How does ASC work?
BMW Motorrad ASC compares the wheel
centrifugal velocities of the front and rear
wheels. The speed difference is used to de-
termine the slip rate, and thus the stability
reserves at the rear wheel. The engine con-
trol adapts the engine torque when the slip
limit is exceeded.
Special situations
As lean angles increase, acceleration capa-
bility is also progressively restricted by the
laws of physics. This can result in delayed
acceleration when exiting very tight turns.
The system compares the rotation speeds
of the front and rear wheels to detect any
tendency for the rear wheel to spin or lose
traction. If the system registers implausible
data for an extended period of time it will
switch off the ASC functionality as safety
precaution and a display will alert you to an
ASC error. A self-diagnosis routine must be
completed before the fault memory entry
will be displayed.
In the following unusual riding conditions,
the BMW Motorrad ASC may possibly
switch off automatically.