Hello, I am new to this site. I have had my 1993 XR250R for 5 years now. I mostly trail ride in the Sierra's. My XR has never let me down. I have advanced in riding skills and am looking for something with more power. I had a 277 kit put in my bike a couple of years ago and it gave me a lot more low end and added a couple more years of making me happy, but now I feel like I need more. I am starting to climb more hills that are longer and steeper and am starting to jump some table tops at some of the tracks around me. Nothing crazy, just much more than I ever did before. I find my 250r running out of steam up hills. I am 6'2" and 210 lbs, 29 years old. I do not like 2 stroke bikes, just rode a 2001 CR250 that my friend bought and it scared me to death, too fast and twitchy. I just rode a 2001 bone stock XR400 today that is for sale in my area. I was disappointed with the power. I think my 280 will take it in acceleration, maybe not climbing though. I was dead set on a used newer model XR400, but now am not so sure. My requirements though, I want to dual sport, green sticker, street legal for connecting trails in the Sierra's. I can't have any of these red sticker bikes. If I got a newer XR400 and added a pipe, jetting, and air filter, would it open it up more? I don't want to be disappointed. If it isn't going to be much better than I have now, I will just stick with what I've got and dual sport it. It has been an excellent bike with no troubles. I ride about 70% fire roads / 30% jacking around, jumping, wheelies, climbing hills with friends. Would a XR400 be right for me with the right combo of aftermarket pipe, jets, air filter? Also thinking about the 440 kit too. Thanks, just very surprised with the bone stock power of the 400 I rode today, not impressed at all. I will be bored with it quick, thanks.