Never would have thought of this on my own, but now I can't stop thinking about it. A friend of mine called me Sunday night to tell me he had his 520EXC out at the drag strip! I didn't know you could do that! He said it ran a 14.1 at 94 mph with stock knobbies(sounds slippery to me). He has never raced before and freely admits he could have done way better with some experience. I have limited experience with racing to but I bet 13's would not be a problem and 12's with some setup. Guess I am just wondering If anybody else has tried this? probably not.