BMW C 650 GT Rider's Manual page 108

Checking brake-fluid
8
level, rear brakes
106
WARNING
Not enough brake fluid in
brake fluid tank
Considerably reduced braking
power due to air in the brake
system
Adjust the riding mode imme-
diately until the fault is rectified.
Check the brake-fluid level at
regular intervals.
z
Make sure the ground is level
and firm and place the Maxi-
Scooter on its centre stand.
Check the brake fluid level in
left brake fluid reservoir 1.
NOTICE
Wear of the brake pads causes
the brake fluid level in the reser-
voir to sink.
https://www.motorcycle-manual.com/
Brake fluid level, rear
Brake fluid, DOT4
It is impermissible for the
brake fluid level to drop below
the MIN mark. (Brake-fluid
reservoir horizontal)
If the brake fluid level drops be-
low the permitted level:
Have the defect rectified as
quickly as possible by a spe-
cialist workshop, preferably
an authorised BMW Motorrad
dealer.