maybe this??

and this/

I've always had a soft spot for big Kwakas. If I was 30 or 40 years younger, I'd have a go at the Ninja - sounds like it would go like stink.

What is the motivation for the production of these bikes? I can kind of see it from a performance perspective. Though how much more performance do you need given what is already on offer? I guess if some is good, more must be better :-)  Fuel consumption? Not sure.  I'm not certain this is a problem that needs to be solved on the emissions front - I think motorcycles are at the bottom of the carbon producing heap. While it all adds up, I'd think you were chasing percentages in this regard.