I have a 1984 R100 with 15,000 miles. I am the second owner and bought the bike in 1999 with 3,500 miles.
For years I have been running Metzeler Lasertec tires with no problems or swaying at high speed (75 mph +).
Two weeks ago I changed out my Lasertecs that were put on last fall with less than 1,000 miles to try out the new Continental Classic Attack Radial Tires. I am experiencing swaying at above 75 mph. Logic would say check the head tube bearings. They have been replaced years ago and still feel good.
The new Conti Radials do have a more rounded profile than the Lasertecs.
Has anyone had a similar problem and solution to swaying at high speed?