Hi Den, i'm in the same boat as you i have some aftermarket mirrors on my F1 (emgo ) i think they are? and they vibrate like mad and the left one starts to turn in once you get over 70
, on my older 750 i have some mirrors that magnify the traffic behind you so it looks like the cars behind are right up yer arse
, and my Kettle has the damping blocks on & original suzuki and its okish, cheers Mick.