I bought the F4 from Don and he was able to get me a clear vented windshield that is 4 inches wider and 23 inches from seal to top.

I will report once it is installed but I feel really good about it.

I am 6' 6" but only have a 33 inch inseam so I need the extra height.

Call Don and he will hook you up--he will answer your questions without trying to sell you anything.