I have talked to them several months ago about using the new KX frame, they indicated that they were sticking with the Hondas and KTMs for the time. I don't know why the KX frame is not doable but if that is the case, is it possible in your experience to drop a KX500 motor into the Honda CRFX frame? Also what is the deal with your project on the other thread. Looks like an exhaust valved 2-stroke,,,,,,what size bore?