The damper does completely remove
headshake on the new KTM 690 Enduro.
I went 110 mph yesterday on TKCs without any headshake. After advice from Scotts/California I adjusted some settings on the damper. It was essential to turn both Sweep control valves by 180° to the 6 o'clock position. (It is delivered and preset to 12 o'clock which damps only in a narrow angle.) At 6 o'clock the complete steering angle is damped. This made the big difference because it can compensate for the great force exerted at high speeds. Also the Highspeed valve is highly effective. I turned it 1/4 counterclockwise from the stiffest setting. This setting will remove the headshake completely.