The 125 is going to kill you. I raced my 125 against warriors, blasters, 250r's, quadsports, everykind of quad around, even a banshee and I beat them all. They all knew i was gonna win, but the rider on the banshee sais that he had low compression and thats why he lost. But against a 400ex, hes gonna eat you for breakfast.
btw- my bike was a 1998 kx125[img]i/expressions/face-icon-small-happy.gif[/img]

 

thanks all for the vote of confidence. I not sure what to think now.