Hey Unit, I have seen F4's dyno over 100 stock. I also agree with it being the weakest of the the 600 bikes(but it still won the championship for 2000!!!!!
). I haven't seen a dyno of the new F4i, but I am planning on going to check them out. I don't know if you have heard of Chaparral Motorsports, but they are less than 10 minutes away from my house.