I have a California bike. If I plug my hoses like that, the bike wont run hardly at all. I think those two line vent the carbs. When I desmogged I put a piece of screen over those two hoses so they would vent but yet keep the bugs out.
Actually, I think the left hose goes to the Secondary Air Control valve, this gets removed during a normal desmog. The hose on the right goes to the Crankcase Storage Tank.