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 canisterAirbox - throttle body
Airbox
O-ring
Injector
Throttle body assembly
Screw
Clamp
Intake manifold
Screw
Pressure sensor
Screw
Clamp
Hose
Sealing washer
Intake manifold
Sealing washer
Screw
Screw
Spacer
Bracket
Rubber pad
Clamp
Hose
Clamp
Union
Washer
Hose
Cable gro ...
Instrument panel on handlebar
Lcd.
Neutral light n (green). Illuminates when the gearbox is in neutral.
High beam light (blue).
It turns on to indicate that the high beam lights are on.
Engine oil pressure light
(red).
Illuminates when engine oil pressure is too low. It must turn
on at key-on, but ...
Front brake lever
Pull the lever (1, fig. 94) Towards the twistgrip to operate the
front brake. The system is hydraulically assisted and you only
need to pull the lever gently.
The control lever (1, fig. 94) Features a dial adjuster (2, fig. 94)
For lever distance from the twistgrip on handlebar
adjustment.
...