Last year I put the F-15 on my 919. It is a bit larger then the F16 and F18. Definately not suppossed to fit, but, after about 5 days of assemble, ride, and remove to make another small change. It worked great. I rode about 200 miles that days and was really happy with the protection and quiet. I went thru a curve over my head met an oncoming car, and went out thru a front yard. When I got up, my sheild was in 25 pieces. I'm now using an F18, with my 755 due in tomorrow.
You may think the sheild in not doing any good, but, use it a few times and then take it off and go ride,You'll see right quick a little cold air goes a long way.
I ride because I love to ride, if it doesn't look just right, that means nothing to me.