Some systems have dual throttles, one cable operated, one stepper motor operated, both have position sensors.
I am not sure why they do it, maybe its the CV carb of fuel injection.
Also, closed loop usualy is the system looking at the OXY sensor, it always looks at all the others.
Most bikes are only closed loop over a small range, mid throttle, mid rpm's, where the EPA measures.
Most bikes also do not have idle speed control, but have a way to bump the idle up on cold start.
I am very interested in learning more about the Honda systems.