It will seriously impact your fuel economy, but, to work right, windshields should be as close to vertical as possible. Following the line of the forks cuts their function by half or better, but is less intrusive to the lines of the bike.
Look at pics of Harley, Indian and Henderson military/police bikes. Windshields are vertical. 1920s through current. Even KZ900/1000 cop shops had upright shields on their fairings.
My next to the last bike with a shield. Ran this same screen on both the 99 800A and the 05 800B (Classic) set like this. No buffeting, no excess fork wobble, and I'm tall enough to see over it set this way.
Really want another 800A. Out handles, out accelerates, better fuel economy than my high bar Savage. Comfortable, proper 21/16 tire combo, easy to find white wall tires if desired, hidden shock so can run real bags... and has a chain and sprockets, easy to fix, easy to clean and lube, can change gearing at will.