Ducati SUPERBIKE 1198 Owner's Manual page 94

Notes
It is not necessary to disconnect the main wiring
loom cable in order to replace the headlight bulbs.
Notes
Be careful to hold the new bulb at the base only.
Never touch the transparent body with your fingers or it
will blacken resulting in reduced bulb brilliancy.
Refitting
After changing the burnt-out bulb, replace the cover and
close it by pressing it against the lever.
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