BMW HP4 Rider's Manual page 151

Switch off the ignition.
Remove cover 1 so that the
low-beam headlight bulb can
be replaced.
Remove cover 2 so that the
high-beam headlight bulb can
be replaced.
Disconnect plug 3.
Release spring clip 4 at left
and right and swing it up.
Remove bulb 5 from the
socket.
Replace the defective bulb.
Bulbs with higher light-
intensity ratings are avail-
able through aftermarket suppli-
ers. These bulbs burn out more
rapidly and generate more heat
than conceptional bulbs. Un-
der adverse conditions the extra
heat can cause damage to the
headlight.
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