Adaptive Headlight - BMW R 1250 GS Adventure Rider's Manual

valves produce staggered
valve lift and offset angles of
rotation. Consequently the
two intake valves open at very
slightly different times and the
distance to which they open
also differs. The advantage:
The fuel/air mixture flowing
into the combustion chamber is
swirled more thoroughly and
combusted effectively - so all
in all the fuel is utilised more
efficiently and engine operation
is perceptibly smoother. The
full-load cam is designed for
optimised engine power and
it maximises intake valve lift.
The intake camshaft is shifted
axially to vary valve timing
and valve lift. The pins of an
electromechanical actuator
engage a shift gate on the
intake camshaft. This permits
load-dependent and speed-
dependent actuation of the
intake valves and, consequently,
a no-compromises combination
of performance and low fuel
consumption.

ADAPTIVE HEADLIGHT

with adaptive head light
How does the adaptive
cornering headlight work?
The low-beam unit installed
as standard in the headlight
consists of two reflectors that
produce a low beam from
an LED light source. Ride
height sensors on front and
rear suspension supply data
for permanent beam throw
adjustment. While the motor-
cycle is moving straight ahead,
pitch compensation keeps the
throw of the headlight beam
constantly in the optimum,
preset range, regardless of
ride and load state. With the
Adaptive headlight function, the
low-beam unit is additionally
rotated about an axis to a
degree that varies with the
bank angle, compensating for
the vehicle's angle of lean. The
angle of rotation is 70° (± 35°).
Along with pitch compensa-
tion, therefore, the throw of the
low-beam headlight also com-
pensates for the rider's chosen
bank angle through corners.
The two movements are super-
imposed, so as the motorcycle
is steered through a bend the
headlight beam is directed into
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