I had the head shake at 45 too untill I adjusted the track of the rear tire. It went away untill just recently. Not all the time though, just every once in awhile. I have the orignal mets on the front with 12,000 miles on it and it is cupping noticably now. I just bought a new Venom-X, which looks alot like the tread patteron of the rear, so I have an appointment the week after next to get my 12,000 mile service done and I'll put it on then. I'm hopeing that will take care of it.
