Ducati MONSTER S2R Owner's Manual page 132

Replace the bulb (4, fig. 50).
Notes
Do not touch the transparent part of the bulb with your
fingers, this will darken it and cause a loss of brightness.
Insert the tabs on the bulb base into the corresponding
slots to obtain the correct position;
hook the end of the clip (3, fig. 49) to the headlamp
mountings. Reconnect the cables.
To replace the parking light bulb, detach the connector.
The bulb (5, fig. 51) is the bayonet-type: press and twist
counter-clockwise to remove. Change the bulb and insert
it by pressing in and turning clockwise until it clicks into
place. Re-attach the connector and secure the rim/
reflector assembly.
4
5
E
fig. 50
fig. 51
55