BMW Motorrad R 1200 GS Rider's Manual page 146

Jump starting
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144
• When jump-starting the
engine, do not disconnect the
battery from the on-board
electrical system
Do not touch live compo-
nents of the ignition system
while the engine is running
– Risk of fatal accident.
Use the battery adapter point
on the positive terminal on your
motorcycle and the shock-ab-
sorber bolt as a ground con-
nection for connecting the
jumper cables.
Make sure that the battery of
the other vehicle has a voltage
rating of 12 V.
Make sure that there is no con-
tact between the body parts
of the two vehicles. Risk of
short-circuit.