Took the CB for a test ride today for the first time with the cowl. I must say ... I didn't notice any real difference. Fortunately, it wasn't worse than without it. No buffeting and no noticeable increase in wind noise. But, no noticeable improvement either. The wind blast seemed just as forceful as before. Maybe a longer ride will provide a better feel for any differences. Luckily, for me, I bought the cowl strictly for aesthetics. And to that end, I'm very pleased. It is precisely the look I was going for.
[url=http://s51.photobucket.com/user/jamesfontaine/media/Mobile%20Uploads/IMAG1340.jpg.html]
EDIT: I wonder if RLETs reduce wind resistance ...