When you want something...........seriously look at the first post(I was asking if his friend was selling it)second post(i was asking what HE was going to do with ti)third post(I was asking how much these engines usualy run for).

I like the power of my stock engine but I'm tired of putting money into it(if I had put all of that money for another engine I would probably have areally a nice one right now) I want something like:xr400,400ex,xr600,klr650,500ex,gs500,yz400f, yz426,ds650....etc

 

A buddy of mine put an xr 600 motor in his 250R. The end product is sweet. He had to lower the bottom frame rails, modify a new air box design, bought an oil cooler and reservoir for a BMW and modified them to fit. The motor has a supertrapp and that's it and he beats banshees and raptors on the track. The mod is well worth it if you have the talent.