Hey Mike, my Busa had the same problem caused by the fork at the mounting bolt opening up . Just tightening the pivot bolt alone won't sort it as the bolt itself is shouldered !
Solution is to remove the sidestand and pinch the forks together in a vice .
It's caused by the constant up / down of the stand wearing the inside of the fork . Alternatively , you could get a small amount of the shoulder of the pivot bolt shaved off in a lathe which in turn would pinch the forks tighter . Fitting spacers or washers isn't really an option due to the shoulder size of the pivot bolt . Hope this helps ?