I had several heights of windshields, from the tallest/widest vented C Bailey to some that I cut down almost to the mirror mounts. On the short ones the wind moves the rider around, especially if you wear a 2XL full face helmet and have a size 54 chest. On the tall ones the wind moves the bike around. At speed, I felt that the side scoops really make the bike run areodynamically dirty, But in the Texas heat, your legs get hotter than a brisket in a smoker without them.