BMW R 1250 GS Adventure Rider's Manual page 196

190 MAINTENANCE
If the brake fluid level drops
below the permitted level:
Have the fault rectified as
quickly as possible by a spe-
cialist workshop, preferably an
authorised BMW Motorrad re-
tailer.
Checking brake-fluid level,
rear brakes
WARNING
Not enough brake fluid in
brake fluid reservoir, or con-
taminants in brake fluid
Considerably reduced braking
power due to presence of air,
contaminants or water in the
brake system
Cease operation of the
vehicle immediately and do
not ride it until the fault has
been rectified.
Check the brake-fluid levels
at regular intervals.
Always make sure that the
lid of the brake fluid reser-
voir and the area around the
lid are cleaned before open-
ing.
Make sure that only fresh
brake fluid from a sealed
container is used.
Make sure the ground is level
and firm and place the motor-
cycle on its centre stand.
Check the brake fluid level in
brake fluid reservoir for rear
wheel brake 1.
Wear of the brake pads
causes the brake fluid
level in the reservoir to sink.
Brake fluid level, rear
Brake fluid, DOT4
It is not permissible for the
brake fluid level to be below
the MIN mark. (Brake-fluid
reservoir horizontal, motor-
cycle upright)