Ducati MONSTER620 Manuel D'utilisation Et Entretien page 86

Identification data
All Ducati motorcycles have two identification numbers,
for frame (fig. 1) and engine (fig. 2.1 - 2.2).
Frame number
Engine number
Note
These numbers identify the motorcycle model and
should always be indicated when ordering spare parts.
620/800 1000
fig. 2.1
E
fig. 1
fig. 2.2
9