Ducati MONSTER Manuel De L'utilisateur page 77

Identification data
All Ducati motorcycles have two identification numbers,
for frame (fig. 1.1) and engine (fig. 1.2).
Frame number
Engine number
Note
These numbers identify the motorcycle model and
should always be indicated when ordering spare parts.
fig. 1.1
600/750
E
fig. 1.2
900
fig. 1.2
9