I think it is the odd profile on the Anakees. My 1250 came with the Anakee Adventures, and I replaced them before 1000 miles with Roadtec 01s. The Anakees give an odd and disconcerting feeling once you start to lean into a bend, as if they are falling into the bend and making you lean over more than you want, to the point where I found I was having to correct and stand the bike up a bit mid-bend, and was particularly noticeable on roundabouts.
Comparing the profiles I think I can see why. The Anakees are relatively gently curved over the middle part, but curve more sharply the closer you get to the edge. This is probably more pronounced on the rear but I think the effect would still be felt at the front in the steering anyway, where the more you lean the more it seems to exaggerate your inputs to the steering. I can't imagine why they are like this, unless it is something to do with giving them a modicum of off road ability.
In contrast, the Roadtecs have what appears to be a completely uniform slope across the whole tyre so you get a predictable response to your steering inputs which, unlike the Anakees, does not vary depending on how far you lean.
New tyres always completely transform my GS.
