BMW G 650 GS Rider's Manual page 90

The rubber cap encloses
8
and forms a seal around
the wiring for the parking light.
86
Consequently, the rubber cap
cannot be removed.
z
Turn retaining ring 3 counter-
clockwise to release and re-
move the ring.
Remove bulb 4.
Replace the defective bulb.
Bulb for low-beam and
high-beam headlight
H4 / 12 V / 55 W / 60 W
Install bulb 4, making sure that
tab 5 is correctly positioned.
Hold retaining ring 3 in position
and turn it clockwise to secure.
Install rubber cap 2.
Connect plug 1.