I am going to look at a 2002 xr400 the seller says its in goos shape what sould i check/look out for? it is 110% STOCK
+1 on the swingarm bolt. No seller will let you remove it, but bring a stand and see if you can MOVE it. (Bring tools!...a breaker bar and sockets) It you can loosen the nut and rotate the bolt you are probably OK. If you can't budge it, that is a major deduct on the order of at least a couple of hundred bucks.#1 thing is the Swing Arm Bolt! See if you can remove it. NO KIDDING!
And what Agent said.