471Riding
ABS anti-lock braking
system
ABS prevents the wheels from
locking on braking, making a
major contribution to road
safety.
Lifting up the rear wheel
With strong adhesion between
the tyres and the road, the
front wheel locks either very
late or not at all when the
brakes are applied hard.
Accordingly, the ABS control
only has to intervene very late
or not at all. In this case, the
rear wheel can lift up, which
can lead to the motorcycle
rolling over. Heavy braking can cause
the rear wheel to rise.
Bear in mind that the ABS
control is unable to prevent
the rear wheel from lifting up in
every instance.c
Residual braking function
With the ignition switched off,
during the self-diagnosis and
in the event of a fault in the
BMW Integral ABS, the brake
circuits concerned only have
the residual braking function.
The residual braking function
is the braking power without
the hydraulic servo assistance
of the BMW Integral ABS.
Under these circumstances,
therefore, you must apply con-
siderably higher pressure to
the brake levers in question in
order to apply the brakes, and
lever travel is longer. When the residual braking function is
active, the ABS function is
unavailable in the brake sys-
tem in question. When the
residual braking function is
active, the integral braking
function is partially or entirely
unavailable.
Without the ABS func-
tion, the wheels may lock
under braking; without braking
power assistance, considera-
bly greater force is required to
brake.
Brake carefully and safely.
Avoid braking sharply. Have
the fault remedied as soon as
possible by a specialist work-
shop, preferably an authorised
BMW motorcycle dealer.c
