Identical experience here, buckhorn bars etc. shaking
In my case, I add a possible damaged front tire bearing seal due to a speedometer failure and the chance metal bits are/were in there. Biker Thug is onto this. But the lack of bar end weights may be the cause or at least contributing.
In any case I hope to get to the dealer in the next few weeks for a new front tire. A slight amount of pressure on the grips and all is fine, but you don't want to say "Hey Ma, look no hands!!!" My work schedule is gonzo right now. I'll report back when I have time to figure it out.
