I am 5'9" 160lbs, 17 years old. I am also a beginner, with very little riding experience...maybe a couple months of riding and racing, but I still like a challenge. I currently have a 07 YZ250F that is in great shape, but I just don't like it. It is too easy to ride and it just seems boring. My form on this bike sucks and I know it, and I always feel like it lets me be lazy. I used to have a little 85 and loved it, which is why I think I'm more of a 2-stroke kind of guy. But I still don't know which one to get. I ride strictly track. What would you suggest?