I dont want to be rude, but it sounds like it might be rider. The neighbor has a 2005 yfz450 with cam mod and pipe with jet kit, and a K&N. He pulls dead even with my banshee in a drag race. I only have cool head, 2 into 1 pipe, 2 into 1 intake, and carbon tech reeds. A ported Banshee with pipes ought to hand a 450 his own ass for dinner in a drag race.