I raced my first race in 8 years Sat. and raced in a Am. class, heres my thing I tire very quickly. I can ride every bit as fast as the top guys in my class for awhile and then I hit the wall, I guess my question is how much of riding hard and fast is tech. or do I just need to get in better shape. I ride with some pro offroaders and they don't seem to tire abit.