I have a friend that is selling a 99 (possibly a 98) YZ400F, with all the mods you can think of, besides a steering damper. I have right now a 2001 KTM 250 MX/C. I have ridden the YZ a couple of times, and while a little heavy and wide, it has more than enough power, and seems to be really suited to the trails that we ride. I know him well enough to know that he takes exceptional care of his bikes, and if something is wrong, he fixes it. He is selling it for $4000, and I think that if I did want to make the switch I could get $4500 for my KTM which is in really good condition. I was wondering, is the price too high for the YZ (I know that it is worth well over this in mods when they were done) and am I expecting to get too much out of my bike? Also, for trail riding would you even recemmend the switch?