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.
Electronic engine
management with
BMW Motorrad ASC
with Automatic Stability Control
(ASC)
OE
How does ASC work?
The BMW Motorrad ASC com-
pares the speed of rotation of the
front wheel and the rear wheel.
The differential is used to com-
pute slip as a measure of the
reserves of stability available at
the rear wheel. If slip exceeds a
certain limit, the engine control
intervenes and adapts the engine
torque accordingly.
What is the design
baseline for ASC?
The BMW Motorrad ASC is de-
signed as an assistant system
for the rider during use on public
roads. The extent to which the
rider affects ASC control can be
considerable (weight shifts when
cornering, items of luggage loose
on the motorcycle), especially
when style of riding takes rider
and machine close to the limits
imposed by physics.
The system is not optimised for
special requirements that apply
under extreme competitive situ-
ations off-road or on the race
course. The BMW Motorrad
ASC can be deactivated in these
cases.
WARNING
Risky riding.
Risk of accident despite ASC.
Invariably, it remains the rider's
responsibility to adapt riding
style to riding conditions.
Do not take risks that would
negate the additional safety
offered by this system.
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 reduction 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
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Engineering details
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