Hey everyone! I'm new to the site/forum. Name's Brad. Located in Champaign, IL. I recently bought a 2004 400ex from my brother. I also ride his other 2 quads, a 2006 400ex and a 2005 450R. I am waiting for a Big bore kit in the mail for my new quad. A friend of ours ran pre-mixed gas through the 400ex and blew it up. lol so I purchased it for $400 from my brother.