Agreed, and sadly, the bicycle examples are simpler than motorcycle examples for a few reasons; one clear one is the effect of suspension action. Depending on chain angle, and for that matter what type of final drive system is on that particular motorcycle, throttle movements (or non movements) affect whether the rear suspension is compressing or extending, which in turn affects the front suspension and steering angle. These can generally be ignored on most bicycles, but it can be very significant when setting up a racebike. That's one of the key reasons racebikes have multiple mounting positions for the engine, to adjust that countershaft location for an optimal chain angle when approaching and accelerating out of corners. Tony Foale has a pretty detailed book that might be interesting for folks that are really into how this all works:
http://www.tonyfoale.com/book.htm