I have an '05 crf 150f and plan to (finally) upgrade this summer. Its not great at wheelies and handling. I'm not the best rider so it's not all the bikes fault. I'm 16, 6 ft., and 140lbs. I mostly ride offroad, and started riding a year ago. Should I upgrade the 150, or just get a new bike? I've heard the crf 230 isn't that good, so should I go for something more like a crf 250x? Moneys kind of tight so were talking used. Are there any years that I should avoid for the crf 250x? Thanks for any help I get.