Is it possible that the fork oil never having been changed could cause these problems? My bike has 28k on the odo and the oil has never been changed according to the only other owner, but that being said the other tires I had on gave me no problems with the current oil so that doesn't seem to make much sense. The tires are balanced and everything else seems to be in check, no cracks, loose bits etc and the chain and sprocket are lubed and good to go as I have already said. I have experimented with different tire pressures ranging from 33F/33R all the way up to 38F/40R and no matter what the speed wobbles still happen. It is my understanding that what is happening is the early stages of a "tank slapper" and the only thing preventing that is the steering dampener. I tried to see if I could ride through the oscillation of the front tire (with my dampener fully tightened) but by the time I hit 115-120 it was so severe I had to lay off. I don't usually ride in the triple digits but I find it extremely irritating that I can't, if the bike can easily get to 160+ with me on it I want to be able to get into the low 100s without the fear that I will be thrown off the bike. I may ask my mechanic if he will balance them again just to see if he made a mistake but other than that I do not know what else I can do.