I have a '00 F4 and I've been asking around and have also searched this forum about vibration and everyone seems to have this with the F4s but mine is not quite the same.
The vibration occurs between 6 and 8k rpm and is noticeable in the tank, saddle, and especially the bars. As soon as I hit the freeway it numbs my hands within minutes. I have new rubber on the front and the forks appear to be in good condition so...
Any feedback or suggestions would be appreciated.