Ok this is going to be a slightly long post so bear with me here. Alright so I have grown up riding dirtbikes since I was about 5 or 6. Went from pw50, pw80, RT100, RT180,TT-R 225 to finally were I am at now, a Raptor. I did not really know about dirtbikes that much, and I wanted to try out somethin different, a quad(just so you can say, been there done that) lol. I dumped over 5 grand into my Raptor and it truely is not that good and I still want more,...I put money into exhaust, suspension, tires, wheels,engine, axle...I tried everything, but I think it now comes down to me getting rid of it so I can finally experience some real power, suspension, and handling. Can I handle a YZ450? Im 15, wiegh 230lbs, and I am 6'5. I know I want a 4 stroke (Yamaha, prefered as I get a deal) but should I get the biggin'(450), or start on a 250? The only thing I think I would have to do is get used to the POWER of the 450, but I meen Im a big dude and I need somethin thats going to fit me, so I think I would be happier on the 450. But tell me what you all think,.. O ya, I ride mostly my friends track or my track and only recently made it out to a real track where I saw that I wanted a dirtbike again. Any help would be GREATLY apprieciated, and thanks in advance also. P.S. I know I just joined, but Ive been lurkin around here for a while. Just thought I would let ya know Im a newbie, but yet not a newbie.