BMW Motorrad R 18, Rider'S Manual

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76 TECHNOLOGY IN DETAIL
Unusual riding conditions:
Riding on the rear wheel (wheelie) for an
extended period with ASC deactivated
Rear wheel spinning when stationary with
front wheel brake engaged (burn-out)
Heating up on auxiliary stand at idle speed
or with gear engaged
ASC is reactivated by turning the ignition
off and on and then riding at a speed above
3 mph (5 km/h).
If the front wheel loses contact with the
ground under extreme acceleration, the ASC
reduces the engine torque, maintaining the
reduction until the front wheel makes con-
tact with the ground again.
BMW Motorrad recommends that you re-
spond to this condition by twisting back the
throttle grip somewhat to return to stable
dynamic operating conditions as quickly as
possible.
Slippery road
On very loose surfaces (e.g. sand and snow),
the interventions of the ASC can reduce the
drive force at the rear wheel to such a de-
gree that the rear wheel no longer turns suf-
ficiently. In this case, BMW Motorrad recom-
mends switching off the ASC temporarily.
Note that the rear wheel will spin on the
loose surface, and close the throttle grip in
a timely manner before reaching a solid sur-
face.
Then switch on ASC again.
RIDING MODE
Selection
In order to adjust the motorcycle to the road
condition and the desired riding experience,
it is possible to select one of the following
riding modes:
RAIN
ROLL
ROCK
For each riding mode, a coordinated set-
ting is available for the following systems:
ASC control, dynamic engine brake control
and the engine characteristics. In the ROCK
riding mode, the engine operates with high
power while in neutral, which makes the
performance capacity of the opposed-twin
engine perceptible even when the vehicle is
at a standstill. The direct throttle response
ensures unfiltered power output and makes
the power train's cylinder capacity impres-
sively perceptible.
Throttle response
In the RAIN riding mode: Soft throttle re-
sponse.
In the ROLL riding mode: Optimal throttle
response.
In the ROCK riding mode: Direct throttle
response.
Automatic Stability Control (ASC)
In the RAIN riding mode: maximum sta-
bility on wet roads. Acceleration may be
reduced on dry roads.
In the ROLL riding mode: high perfor-
mance on dry roads. In poor road condi-
tions, optimum stability cannot be guaran-
teed.
In the ROCK riding mode: Maximum per-
formance. Stability may be impaired on
poorly surfaced roads or if using unsuit-
able tires.
Changing the setting
Riding modes can be changed when the
vehicle is at a standstill with the ignition
switched on. A changeover while riding is
possible under the following conditions:
No drive torque at rear wheel.
No brake pressure in the braking system.
For a changeover while riding, the following
steps must be carried out:
Turn back throttle grip.
Do not actuate brake lever.
Deactivate the cruise control.