Ducati SPORT 1000 Manuel D'utilisation page 130

Stop light
To replace the stop and parking light bulb, unscrew the
two screws (1, fig. 52) that secure the glass and remove
glass. The bulb is of the banjo-type: press and rotate
anticlockwise to remove; fit the spare bulb by pressing and
turning clockwise until it clicks (fig. 53). Refit the glass and
tighten the screws (1).
1
E
fig. 52
fig. 53
55