bob109, Just the feedback I was looking for. Your high frequency vibration that went away after break in was new to me. I did read about a GW 1800 rider that cured his low speed head shake after putting a rear tire up front. Mine has a slight 40 to 45 mph head shake. Maybe any new front tire, dark side or not helps this? Mine is not too worrisome, it's a mostly noticeable on deceleration. Thanks for documenting your Ax experience.