I think they are from Europe. I was thinking it was to good to be true, because btosports and Thompsonmotorsports.com have a listing for 2004-2008 crf450r. Every other bike listed is a 2 stroke, so I think they must be talking about the "X". Just wanted to talk to the "Pros" here and get the real scoop 8) Thanks for the reply Shawn.