Thank you , a great reply .
It seems to me that flat sides would negate side lift almost entirely, that's the Bernoullian component dealt with or am I missing something ?
As you say the Newtonian component is the problem that remains and feet forward seems the obvious response. I think a Honda CT110 would make an ideal basis for such a bike, for me at least. There is a bloke who posted an excellent thread on his Honda 90 version of feet forward and I've been thinking about it ever since . This basic design should work but if I add a Vetter style rear section I still have the curved life areas .
This bike.