I currently have a 2006 suzuki ltz 400 with a 434 stroker kit. I was looking at trading it for a dirtbike. I believe that i will trade with someone locally who has a 2004 wr450f. He has never done any cylinder work and he stated it doesnt smoke. Only mods ate jetting, yz exhaust? And a boysen powershot and side cover. My question is, what should i look for on this bike? The last dirtbike i had was an kx500 two stroke in the 90's. I do all of my own work. Things that i could tell it needed initially: Foot pegs Number plate. It still ahd the origional decals and the origional tires. The tires look almost jew treadwise, but they are dry rotted. I have looked up replacement plastics and tures and am fine with the cost. How fast should this be in comparison to my race prepped quad?