BMW Motorrad R nineT/5, Rider'S Manual, Page: 80 / 183

How important is regular
maintenance?
WARNING
Brake system not regularly
serviced
Risk of accident
In order to ensure that the
BMW Motorrad ABS is always
maintained in optimum condi-
tion, it is essential for you to
comply strictly with the spe-
cified inspection intervals.
Safety reserves
The potentially shorter braking
distances which BMW Motorrad
ABS permits must not be used
as an excuse for careless riding.
ABS is primarily a means of en-
suring a safety margin in genuine
emergencies.
WARNING
Braking when cornering
Risk of accident despite ABS
Invariably, the rider bears re-
sponsibility for assessing road
and traffic conditions and ad-
opting his or her style of riding
accordingly.
Do not take risks that would
negate the additional margin of
safety offered by this system.
Automatic Stability
Control (ASC)
How does ASC work?
The BMW Motorrad ASC system
compares the speed of rotation
of the front wheel and the rear
wheel. The differential is used
to compute slip as a measure of
the reserves of stability available
at the rear wheel. If slip exceeds
a certain limit, the engine man-
agement system intervenes and
adapts engine torque accordingly.
Special situations
In accordance with the laws of
physics, the ability to accelerate
is restricted more and more as
the angle of heel increases. Con-
sequently, there can be a per-
ceptible lag in acceleration out of
very tight bends.
The speeds of the front and
rear wheels are compared as
one means of detecting the rear
wheel's incipient tendency to
spin or slip sideways. If the sys-
tem registers implausible values
for a lengthy period the ASC
function is deactivated for safety
reasons and an ASC fault mes-
sage is issued. Self-diagnosis
has to complete before fault
messages can be issued.
The BMW Motorrad ASC can
switch off automatically under
the exceptional riding conditions
outlined below.
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z Engineering details