BMW HP4 Rider's Manual page 150

Replace defective bulb.
9
Bulb for parking light
148
W5W / 12 V / 5 W
To prevent contaminants from
being deposited on the new
bulb's glass surface, always use
a clean, dry cloth to hold it.
z
Insert bulb 4 into the socket.
Insert socket 3 in headlight
housing, continuing to apply
pressure until the retainer 2
engages.
Install the cover.
Replacing front and rear
turn indicator bulbs
Make sure ground is level and
firm and park motorcycle.
Switch off ignition.
Remove screw 1.
Pull glass on screw connection
side out of mirror housing.