Bike is a 1989 K100RS. 10t/original miles. The other day I experienced a high speed wobble. Do not care to experience another! Entering a very long yield curve at aprox 50mph. There was a long crack in the asphalt that had been repaired, but still had a depression. I shoulder checking for traffic, bike ended up in the crack and the front began to wobble, quiet severely. Was able to ride it out. Tires are new 3 months ago, tire pressure is good. Bike has never done anything out of the ordinary. This bike does not have a damper like my 1998 K1200RS. Can one be retroffited or does anyone sell a bolt on damper. Anything else that may have caused this? Cheers. Ken.