Sorry, KarlJay I really don't know as I just bought this bike and immediately took off the fairing and belly pan. I would imagine there is some benefit to the fairing as it flares out a bit more than most of the smaller bikini types but it's not going to give as much as any full fairing. That said, I'm most likely going to keep it as it bolts on and off easily which I can use it for longer rides.
I'm more interested in selling the belly pan. It looks really cool but I'm not a belly pan guy i like looking at the naked engine and also just bought a rack so trying to recoup some $$ to pay for that. The paint on both of these peices is really really good. Matches the original Honda Candy Red perfect.