i am in the process of buying a new bike, i have had a honda xr 100 for a long time and it is so small i can't even ride it anymore. now i can either get a 125 or a 250 cr. i am about 5'8' and 160 lbs. i am not looking to race, but i would ride on tracks a lot. if anyone knows alot on the subject, your advice would be greatly appreciated.