Ducati ST4s Owner's Manual page 137

The side position of the headlamp is adjusted using the
adjusting screw (2, fig. 45.3) on the right side of
headlamp. Remove the right side guard of the instrument
panel (see page 42) to expose the screw. Turn the screw
clockwise to move the beam to the right, anticlockwise
to move it to the left.
LOWER
E
1
UPPER
fig. 45.2
LINKS
2
RECHTS
fig. 45.3
fig. 45.1
59