Page 88 of 168

If the front wheel lifts clear of the
ground under severe accelera-
tion, the ASC reduces engine
torque until the front wheel re-
gains contact with the ground.
Under these circumstances,
BMW Motorrad recommends
rolling the throttle slightly closed
so as to restore stability with the
least possible delay.
When riding on a slippery sur-
face, never snap the throttle
twistgrip fully closed without
pulling the clutch at the same
time. Engine braking torque can
cause the rear wheel to lock, with
a corresponding loss of stability.
The BWM Motorrad ASC is un-
able to control a situation of this
nature.
Tyre pressure
monitoring RDC
OE
FunctionA sensor integrated into each
tyre measures the air temperat-
ure and the air pressure inside
the tyre and transmits this in-
formation to the control unit.
Each sensor has a centrifugal-
force tripswitch that does not
enable transmission of the meas-
ured values until the motorcycle
has accelerated to about 30 km/
h. The display shows
--
for
each tyre until the tyre-pressure
signal is received for the first
time. The sensors continue to
transmit the measured-value sig-
nals for approximately 15 minutes
after the motorcycle comes to a
stop.
The control unit can adminis-
trate four sensors, so two dif-
ferent sets of wheels with RDC
sensors can be alternated on the motorcycle. An error mes-
sage is issued if wheels without
sensors are fitted to a motorcycle
equipped with an RDC control
unit.
Temperature
compensationThe tyre-pressure readings
shown by the multifunction
display are temperature-
compensated; the reference tyre
temperature for these readings
is always 20 °C. The air lines
available to the public in petrol
stations and motorway service
areas almost invariably show
temperature-dependent tyre
pressures, so in most instances
these gauge readings will not
tally with the readings shown by
the multifunction display.
686zEngineering details
Page 111 of 168

Force the brake pads slightly
apart by rocking brake
calipers4back and forth A
against brake discs 5.
Mask off the parts of the wheel
rim that could be scratched in
the process of removing the
brake calipers.
Carefully pull the brake calipers
back and out until clear of the
brake discs.
with OE BMW Motorrad Integral
ABS: When removing the left brake
caliper, take care not to dam-
age the ABS sensor cable. Raise front of motorcycle until
the front wheel can turn freely.
BMW Motorrad recommends
the BMW Motorrad front-wheel
stand for lifting the motorcycle.
Install the front-wheel stand
( 115)
Remove right-hand axle clamp-
ing screw
6.
with OE BMW Motorrad Integral
ABS: The left axle clamping
screw locates the threaded
bush in the front suspension.
If the threaded bush is not correctly aligned the gap
between the ABS sensor ring
and the ABS sensor will not be
correct and this can cause the
ABS to malfunction or allow the
ABS sensor to be damaged.
In order to ensure that the
threaded bush remains correctly
aligned, do not slacken or
remove the left axle camping
screw.
Remove right-hand axle clamp-
ing screw 6.
Remove quick-release axle 7,
holding the wheel as you do
so.
Lower the front wheel to the
ground between the front forks.
Roll the front wheel forward to
remove.
8109zMaintenance
Page 120 of 168

Press the lever down to the
ground.BulbsGeneral instructionsThe failure of a bulb is signalled
in the display by the defective
lamp symbol. If the brake or rear
light fails, the symbol is accom-
panied by the 'General' warning
light, which lights up yellow. If
the rear light fails the second fil-
ament of the brake light shines
at reduced brightness to double
as a rear light. Even though you
have this substitute rear light, theindicators in the display tell you
that a bulb defect has occurred.
A defective bulb places
your safety at risk because
it is easier for other users to
oversee the motorcycle.
Replace defective bulbs as
soon as possible; always carry a
complete set of spare bulbs if
possible.
The bulb is pressurised and
can cause injury if dam-
aged.
Wear protective goggles and
gloves when changing bulbs.
The types of bulb fitted to
your motorcycle are listed
in the section entitled "Technical
data".
Do not touch the glass of
new bulbs with your fingers.
Use a clean, dry cloth to hold
the bulbs when handling them.
Dirt deposits, in particular oil and
grease, interfere with heat radi- ation from the bulb. This leads
to overheating and shortens the
bulb's operating life.
Replacing low-beam and
high-beam headlight bulb
If it is not standing firmly,
the motorcycle could topple
in the course of the operations
described below.
Always make sure that the
motorcycle is stable and firmly
supported.
Make sure the ground is level
and firm and place the motor-
cycle on its stand.
Switch off the ignition. Turn the handlebars to the
left to facilitate access.
8118zMaintenance
Page 121 of 168
Remove cover1(high-beam
headlight) or cover 2(low-beam
headlight) by turning cover
counter-clockwise.
Disconnect plug 3. Disengage spring clip
4from
the latches and swing it up.
The spring clip might face
in a direction other than
that shown here, depending on
the light. Remove bulb
5.
Replace the defective bulb.
Bulb for high-beam
headlight
H7/12V/55W Bulb for low-beam head-
light
H7/12V/55W
8119zMaintenance
Page 122 of 168
Install bulb5. When installing,
make sure that tab 6is point-
ing up.
Engage spring retainer 4in the
catches. Connect plug
3.
Install cover 1(high-beam
headlight) or cover 2(low-beam
headlight) by turning cover
clockwise.
Replacing parking-light
bulb
If it is not standing firmly,
the motorcycle could topple
in the course of the operations
described below.
Always make sure that the
motorcycle is stable and firmly
supported.
Make sure the ground is level
and firm and place the motor-
cycle on its stand.
Switch off the ignition.
8120zMaintenance
Page 123 of 168
Remove securing screws1
from both sides of the bulb
housing.
Pull the bulb housing forward
to remove it and tilt it slightly
down. Remove bulb holder
2from the
headlight housing by turning it
counter-clockwise.
Remove bulb 3from the bulb
holder.
Replace the defective bulb.
Bulb for parking light
W5W / 12 V / 5 W Insert bulb
3into the bulb
socket.
Turn the bulb socket clock-
wise to install it in the headlight
housing.
8121zMaintenance
Page 124 of 168
The headlight cable could
catch in the steering if it is
not routed correctly.
Use the appropriate retaining
clips to secure electric wires at
the back of the headlight.
Push the bulb housing into
mounts 4on the frame. Install securing screws
1at
both sides of the bulb hous-
ing.
Replacing brake light and
rear light bulb
If it is not standing firmly,
the motorcycle could topple
in the course of the operations
described below.
Always make sure that the
motorcycle is stable and firmly
supported.
Make sure the ground is level
and firm and place the motor-
cycle on its stand. Switch off the ignition.
Remove the seat ( 66)
Remove screw
1.
Pull the bulb housing to the
rear until it is clear of holders 2.
8122zMaintenance
Page 125 of 168
Turn bulb holder3counter-
clockwise to remove it from the
bulb housing.
Press bulb 4into socket 5and
remove by turning it counter-
clockwise. Replace the defective bulb.
Bulb for tail light/brake
light
P21W / 12 V / 21 W
Press bulb 4into socket 5and
turn it clockwise to install. Turn bulb socket
3clockwise
to install it in the bulb housing.
Seat the bulb housing in hold-
ers 2.
8123zMaintenance