Honda has filed plans for a rotary-type throttling device (!) for an upcoming sport bike that, in this first-registration sketch, looks amazing.
What the bike in the drawings actually is remains something of a mystery. There’s no mention of a specific motorcycle model in the designs for the rotary throttling device, which improves inlet port performance by letting the right amount of air into motor as needed ahead of the cylinder with a moving valve that runs independently of the throttle. You can see the set-up for the rotary device that feeds the inlet ports directly, below.