Tyre pressures are my personal default setting for low profile radials of 36 psi front, 42 rear, which is a little higher than the handbook figures. The first time I rode the bike it had stood for some time and the front tyre was down to 1.7 bar (about 25 psi) and it felt really terrible, so I guess it is particularly sensitive to front tyre pressure. I have to a great extent become familiar with the very noticeable "self-steer" tendency on low speed turns, which is not unlike my old airhead R100RS and before that a R75/6, so it may really just be a case of refamiliarisation and learning to live with it. I think I will still try it with the damper off, though, just to see if there are any adverse effects at high speed. Thanks for all the advice.