Ducati Scrambler 1100 Owner's Manual page 202

Disconnect the connector (6).
Release the clip (7).
The bulb (8) has a bayonet joint: press and twist
counter clockwise to remove it. Remove the bulb,
then fit the new one by pressing and turning
clockwise until it clicks into its seat.
Note
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.
To reassemble, refit any previously removed parts
following the removal procedure in reverse order and
tighten screws (1, Fig. 167) to 5 Nm.
6
8
8
Fig. 170
7
Fig. 171
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