I have a Scotts
freezer16801 is totally correct: If you set up your suspension with the correct sag/preload for your weight and then work on the damping you will be there. When I first took delivery the bike started shaking its head at 75 MPH, a trip back to the dealer showed up a loose rear wheel, the PDI guy got a kick in the ***s for that one, I should be looking for loose wheel(s) when taking delivery??? (guess so--won't make that mistake again!!!) So thye shake now moves up to 85 MPH, which I can live with while breaking in the machine, but I ordered the Scotts damper (which they make for Olins), bolt it on and now my shake appears at 100 MPH, but sorta in slow motion, very scary.
I went to a suspension school and learned the nits and grits of rake, trail, damping and ride height, I also got the not so subtle message that the HYM was not designed for a rider of my height/weight (6'1" 235) so I have to live with some compromises.
I opted for a bit more trail by making my forks flush with the triple clamps and have been able to push the HYM to speeds well over 100 MPH without head shake. The Scotts is almost a passenger at this point, but I know if I hit rough road it's available.
And BTW if you don't think the energy a steering damper absorbs isn't transmitted to the chassis just look where it is anchored...
RS