Frank, I think you are referring to the Royal Enfield Dreamliner which I described here
http://ecomodder.com/forum/showthrea...tml#post277230
In the "Free Speed" article on my webite (in this folder)
Index of /graphics/aero
circa 1975 the author points out how many of the factory F750 fairings had pretty obvious faults. Some factories from the 1950s on have spent time on wind tunnel development (NSU, Guzzi, more recently Derbi, Aprilia) and others seem to just copy or do whatever strikes their fancy. When you get to people racing at the club level then all bets are off on what you'll find. I've seen a number of people on small vintage RR bikes running fairings that leave 3-4" of rider sticking out all the way around. They may as well leave the fairing off and save the weight.
cheers,
Michael