Ducati ST4S Owner's Manual page 146

Rear brake pedal (fig. 24)
Push down on the pedal (1) to apply the rear brake.
The system is hydraulically operated.
E
Gear change pedal (fig. 25)
Gear change pedal features a rest central position N with
automatic spring-back, can move in two ways:
down = press down the pedal to engage the 1
to shift down. The N light will go out.
up = lift the pedal to engage the 2nd gear and then the 3
4 5 6th gear.
th, th and
Each time you move the pedal you will engage the next
gear.
36
st
gear and
rd,
1
fig. 24
6
5
4
3
2
N
1
fig. 25