Not sure if you knew it, but I already made one of those. Sure it was pretty fun, took it too the track and rode it. But it still didn't beat the CR500AF feeling, of almost unrideable. That is what I love, so that is why I'm building this. The CR500AF, I could have left stock and/or even modded it to be more rideable, but I like the rush I get. I made it a fire breathing monster. I have someone ask me almost every time I go to the track with it, why not just buy a CRF450? I'm like first, this bike will kick the living crap out of that 4 stroke. Second, it handles better. Third, I have as much in my CR125, CR500AF and CR85 together, to buy only 1 CRF450. So which would you do?