Here's something I posed to my friend this weekend. Oh, by the way got a great 4 stroke story for everyone later regarding him, he is a 4 stroke lover. Anyhoo, One of the last 2 stroke racers was David vuillemin if anyone remembers. He was ademant about riding the 250 2 stroke in supercross the year he went to Bookoo, reality of speed team. Anyways, the story goes like this, he rode and did quite shitty. I in fact wrote Erica, before he went with that team and told her it was a bad idea, since I knew Lucky. Long story short, he didn't qualify for a couple races and previously he was top 5. It came down to them saying it was the 2 stroke and he needed to switch over. He did and he still sucked azz. I had this question to my friend and he didn't know obviously, but made him think. Are the 450F's really all that much faster, or is it just the mentality of "it's faster?" He didn't do any better with the 450F, and I still to this day believe it was the team bikes that sucked rather than David. I think on a factory bike, where he came from, he would have done fine on his YZ250. I also remember this story if anyone else can. When James Stewart was on the RS250, or KX250 as we know it. He was asked, "What will it take for you to beat RC?" His answer was very short. 450F. As we all know, that didn't mean anything either. James still got his butt handed to him from the GOAT. So, really, the whole point to this, is the 450F any faster? Most everyone on that side thinks it is. But maybe it's not and if top riders would actually ride a 250 2 stroke, they would do just as good. I'm gonna send a letter to some magazines and ask them to test lap times of both and compare. A factory fast guy.