That looks exactly like the Air Switching Valve setup on the Air Suction System that I have on my '09 Concours....including the reed valves.... Manual is a bit vague but quick search found the explination below:
Air Swithing Valve (ASV) a valve in an air injection system that senses intake manifold vacuum and during heavy loads, dumps part of the air pump output to the air cleaner to reduce air injections system pressure.
Mine also connects to the airbox but I couldn't find a good flow diagram for the system.
Now I'm intrigued! Be sure to let us know what you find!