Having heard about the Bolt head shake trait before buying an SCR950,
I went old school and gave the adjusting ring a tap or three with a long punch and hammer when it only had about 2,000-2,200 miles on it.
It barely moved, but the steering still felt nice and smooth without being bound-up at all.
I bought a proper adjustment wrench and did it the right way at about 5,000 miles.
At no time before, during or after that time did I ever experience the slightest headshake.
I even tried to make it do it by taking my hands off the bars when slowing from highway speed down a freeway off ramp.
The only thing I may have done different than most is I drilled and tapped the original bar ends to accept a set of SV650 weights.