"I just tightened the steering damper and the wobble went away."
Yes of course but then you're back to riding a plodder and I don't ride that way .
Not even on my Tiddlers .
My new to me 1975 BMW R60/6 barn find Moto (! 8,000 miles yahoo !) also has a very slight oscillation of the bars if I let go of them above 40 MPH or so, I tried setting the damper on it's lowest setting and don't like it but I don't think it'll ever become a true tank slapper either so I'll just live with it, I suppose I'm not supposed to ever take my hands off the grips, right ?
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