Well I found that banshee to race me.....couldn't find a stock or lightly modded one, but at least the one i found didn't have nitrous! He had a good 40 feet on me by fourth gear, but he also had an extra foot of swingarm, sand tires, a few thousand dollars worth of big bore kit, carbs, pipes, reeds, even a different crank and tranny! There was more that I don't remember and I'm sure more he didn't tell me.
Also lined up witth a raptor 700. He had sand tires, and claimed to be stock other than that. I hit the rev limiter in 2nd gear and he got ahead, but I'd caught back up by fourth. Still gave him the win even if only by a foot.
Had several trx450r's run me. None had less than sand tires and exhaust (no idea what else they had) One of them would pull away, the rest of them I was either pulling away from right off the line or playing catchup and passing them by fourth gear.
Oh yeah, there was a 400ex there too.........but ya'll know what happened to him.