Ducati MONSTER 1100 S Owner's Manual page 21

"TRIP" meter
vs. EU
While in this function, if you press switch (1, fig. 9) in
E
position B "▼" for 3 seconds, the reading is reset.
If the reading exceeds 999.9, it is reset to zero and the
count restarts automatically.
vs. UK
vs. USA
fig. 12
20