BMW 2012 R 1200 GS Rider's Manual page 106

Checking rear brake fluid
8
level
A low fluid level in the
104
brake reservoir can allow air
to penetrate the brake system.
This significantly reduces braking
efficiency.
Check brake fluid level
regularly.
Make sure ground is level and
firm and place motorcycle on
its center stand.
z
Read off brake fluid level at
rear brake-fluid reservoir 1.
The brake fluid level in the
brake-fluid reservoir drops
due to brake pad wear.
Rear brake fluid level
Brake fluid (DOT4)
The brake fluid level must
not fall below the MIN mark.
(Brake-fluid reservoir hori-
zontal, motorcycle standing
upright)
If brake fluid level drops below
permissible level:
Have the defect corrected as
soon as possible by a special-
ized workshop, preferably an
authorized BMW Motorrad re-
tailer.