I bought my son a 150r expert, and we love it, however, he wants to race it. We raced today (never raced before) and he got put into the supermini class because his bike is a big wheel. He's been riding a cr80 for the last couple years, and he is just getting to big for it. The 150 is a much better fit. Now the problem...this supermini class is fast. My son got lapped both motos, and finished dead last both motos. He is comfortable riding, but it has always been open field suff, this was his first weekend on a track, and he is struggling with jumps and holeshots, although I'm not to concerned about this, it'll come with time. He wants to bring his 80 next time so he can at least enter a beginner class. I think it's a good idea just so he can get more seat time, but several people at the track told me it's a bad idea to have him run a 2 stroke *and* a 4 stroke. I want him to have fun, and I know it's no fun getting smoked every time out. I'm worried he will just get tired of always being last, and just want to give it up. What do you guys think?