Cormanus, once I added the bar risers to my XSR, the seating position became so upright that the increased windblast on the freeway slowed me down from my previous 75-80 mph to an average of 65-70 mph. In an effort to regain those lost ten mph I tried two different Dart windscreens on my XSR, the smaller Classic and larger Marlin. They both added too much noisy turbulence around my helmet, and, yes, I always wear heavy-duty earplugs when I ride. Although the Darts are classified as small flyscreens, they're still too large for me. I tossed the Classic and kept the Marlin, but I doubt I will ever use it again.
Ever since I owned my ST1300, I've always had to fight this battle against noisy turbulence and/or annoying buffeting on upright bikes with windshields. My V-Strom 1000 was the worst, in that regard. After my experience with those two bikes, constantly trying new screens, the latest aero-flips, going taller, cutting them down, removing them altogether, etc., I finally realized that windscreens on upright motorcycles are far more trouble than they're worth to me.
I see some people here have these giant, barn door-sized windshields on their CBs. I'm sure those bikes don't have any problems with noisy turbulence, but I could never do that. I am not willing to peer through a hot, bug-splattered/rain-obscured windshield, plus I can't stand the way they look. On my beautiful EX, such windshields are strictly anathema to me.
As I discovered on my V-Strom, no screen was the best screen. Removing the stock screen altogether made for the most comfortable ride, at the expense of simply hideous looks.
With that in mind, this is what finally worked for me on the XSR...
The factory Yamaha flyscreen is so small that it basically just covers the instrument cluster. This screen is even smaller than it appears in these pictures, yet it gives me back my lost ten mph on the freeway, without ruining the looks of the bike.
So far, the windblast on the Honda hasn't been severe enough to make me want to do something about it. I love the looks of that front end so much, I doubt I will ever try a windscreen on her. For one thing, unlike the XSR, the instrument cluster doesn't need covering. In typical Honda fashion, the CB's instruments and dash are fully buttoned up and clean-looking, with no exposed wiring. Even though it's a naked, there are no bug graveyards in and around the headlight/instruments area. Cleaning the front of the CB is easier now than it would be if I always had to clear off dried bugs from a windscreen.