I know this forum has a more general "What bike should I buy section", but I think I've narrowed down my choices, and I'd like input from you folks specifically, if you would. I'll start with me. I'm 34, 6'2", 190 lbs. I started out racing motocross on CR125s when I was 14, graduated into YZ/CR250s as I got into my older teen years. I would be considered an "intermediate" rider at most of the tracks I'd ride. In my early 20s I started in on enduros with a WR250 (two stroke). Got to be a midpack B rider in AMA D36 events. In my mid-20's, I took a hiatus from riding. Not sure why now, could say I just got busy, could say it was because I moved to a new area. I want to get back into MX. Most of the tracks I will practice on are pretty poorly maintained. Typically hardpack (to the point of blue groove) with gravel/sand on top, lots of ruts and square edge bumps, pretty ugly. I do plan on attending open practice at a couple of local MX tracks, too, and I've heard they're either muddy (over watered) or hardpack with the gravel/sand overlay. My experience tells me that getting a 250 two stroke (i.e. YZ/CR 250) to hook up on these tracks is going to be difficult, at least, for me. I've fought two strokes quite a bit on similar tracks trying to control the power, and I think I'm getting too old for that I realize that you can get hurt riding MX, but I'd like to decrease the odds as much as possible. The bike must be green sticker legal (I'm in CA). And I'd like to spend a maximum of $3k. That seems to mean something 2002 or older. I've been told something like a YZ250f/YZ426f would be an ideal choice. I've also been told a 2002 YZ250 (two stroke) could be a good bike, too. At the end of the day, I'd like to be able to put in legitimate 45 minute motos. I realize I'll have to do my part in getting back to that level, but having an easy to ride bike will help. Of the three bikes above, which would be most appropriate? I know that is somewhat subjective, but any opinion would be helpful. I know nothing about the four stroke Yamahas, I've never ridden one. In fact, I haven't really ridden any modern four strokes. How would the YZ250f or YZ426f compare to the YZ250 (two stroke)? I assume most of you guys came from a two stroke background. I've heard the four strokes take a bit more to maintain, but I'm OK with that. I'm a mechanical engineer that likes to get his hands dirty, and I've always maintained my own bikes. Shim under bucket valve adjustments don't scare me. Thanks for the input.