Point well taken Hoop, that is why I recommended after all the stuff was tried the first time around, that he start working his way through adding items to suppress the natural oscillation...Sportbikes, having more weight on front and very aggressive steering geometry NEVER get it controlled, so steering damper, fork and swingarm bracing were common add on remedies or before "building" them into the designs (as long as they had couple years) to refine and cure the problems in specific models...