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 canisterIndicator air - air temperature
This function shows the external temperature.
Display limits: -39C ÷ +124C
In the event of a sensor fault (-40C,+125C or
disconnected), a string of dashes "- - -" (not flashing) is
displayed and the "engine/vehicle diagnosis - eobd" light
(7, fig. 4) Comes on.
N ...
Useful information for safe riding
Warning
Read this section before riding your motorcycle.
Many accidents are the result of the inexperience of the
rider. Always make sure you have your licence with you; you
need a valid licence that entitles you to ride a motorcycle.
Do not lend your motorcycle to persons who are
inexperie ...
Refitting the external components
Fit the cap (39) on spring (38) until it engages.
Mount ball (40), spring (38) with cap (39), washer (37) and screw (36) on the
chain side half-casing by starting the
screw into hole (f).
Note
The spring (38), with cap (39), must be oriented as shown.
Tighten the screw fully home to a torqu ...