Hey guys am i the only one with a slow f-3 top end mph 104. I was surprised i was figuring on about 115 mph at lease. i do have a 28" F-4 wind screen. That has to be hurting the mph some. I have stock exhaust, no mods except the F-4 wind screen. It runs hard up to about 100 mph after that not much more. what kind of speed have some of you guys run with a wind screen, stock exhaust. I am going to take the F-4 wind screen off just to see how much it does hurt mph. will put it back on after the test, go to have my F-4 .