I'm sort of new to dirt bikes I've always wanted one when i was a little kid but my parents didn't have the money to go out and buy me one. I'm gonna try and save my money and buy a used one on Craigslist. My buddy has a 05 RM 250 4 stroke and KTM 250sx 2 stroke and I can rip like hell on them. But I'm 17yrs old and 5"7 169 pounds. & and any advice buying used bike would be great thanks...