Right now I'm on a built 400ex and I'm looking at going to the Kfx450r. A lot of people think it's a good idea, some people said it's stupid. I am trying to convince myself one way or another because I'll be spending all of my extra spending money for the next month to get one and I want to make sure it's going to be worth it. Obviously, this thing is going to stay in stock trim for awhile since it'll cost a bit for me to get it, I'll be doing small stuff like suspension tuning and what not, but how good are these things for stock? I'll probably get to the basics next year and save money up until then.