Ducati 749S 2002 Manuel D'utilisation Et Entretien page 145

Checking and topping up the coolant level
Check the coolant level in the expansion reservoir, on the
RH side of the motorcycle. The coolant level must be
between the marks (1) and (2). The longest mark (2)
indicates MAX level, whereas the shortest mark (1)
indicates MIN level.
Top up if the level is below the MINIMUM level.
Note
For a good view of the coolant level, look at the
tank from the left side of the motorcycle. Look down
between front wheel and right fairing.
(fig. 54)
2
1
E
fig. 54
55