i am a woods rider but would like to try the mx track, i have an xr250 and it is not fun at the track. i am thinking that a yz125 would be a good choice for a new guy like me but while looking i came across a great deal on a wr400, it is a 2000 in great shape with a few extras and i think i could get it for 3k. what would have to be done to this bike to ride it at the track? i am looking at the yz125 because most people say i could ride it in the trees in a pinch(when i want to take someone with me that doesn't have a bike) so the wr would get some trail use but i dont want to completly redo the bike so i can ride the track. help me out, thanks