I am 32. I am a fast rider..I have had big bore bikes all my life. I just sold my heavily modded xr600R .After i dried my tears i started on my search.. Im looking at 2002yz426 and or 01 or 02 250F.. I am 172. Very fit. I ride hard and at the track often and i will get much more track time with my NEW bike.. What should i get.. Will a 250F be under powered for me.. Will the 426 be a dog, or will a regret not having the 250 F..