I've not head AM doing one hence why I think it's fake. (AM adds cylinders to kawasaki engines as the cranks are pressed together so easier to take apart and extend.)
the red one is from a pre 2005 post about a future project that actually referenced allen millyard and the shopped cbx-8 was a teaser to his project. Not sure if he ever finished it or even started it.
I would assume the latter since i haven't seen or heard of it again. sure would be neat to look at though