Usa models are equipped with an additional system with an evaporative emissions canister that prevents fuel fumes from being discharged into the atmosphere.
The breather hose (4) is connected to the canister filter (1); when the fuel has been filtered, it is returned through the hose (2) to the horizontal (a) and vertical (b) intake manifolds via the hoses (2a) and (2b). Drainage pipe (c) and the hose (5) vent to the ground.
For correct positioning of the connection hoses consult the indications given below.

Evaporative emissions canister
Removal of the evaporative emissions canisterRefitting the abs control unit
If the brake hoses (7), (8), (9) and (10) on the abs control unit are changed
or removed, ensure that the fittings on the
control unit are positioned correctly.
Warning
If incorrectly positioned, the hose can affect brake operation and
foul moving parts. Position the hose as shown in the
fig ...
Symbols
Ducati motor holding s.P.A. Advises you to read this manual
carefully in order to become familiar with your motorcycle. If
in doubt, please contact a ducati dealer or authorised
service centre. The information contained herein will prove
useful on your trips - and ducati motor holding s.P.A. Wis ...
Removal of the engine
In order to remove engine you must first remove a series of other components
from the motorcycle.
Most of these removal procedures are described in the relative sections of this
manual.
The following flow chart illustrates the logical sequence in which the parts are
to be removed from th ...