Hi when I changed from the stock metzlers to tkc80's on the front tyre I had and still have the same problem, low speed mini roundabouts are particularly tricky. It seems that the tread pattern grips the road, I also found the bike tended to hold a straight line more than the previouse tyres. Its just the design of the tyre.

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XTz 660 tenere, adventure spec bash plate, main stand, skid marks tall screen, Oxford tail pack 36 litre. Kobra hand guards, Bigger cast footpegs, Zen overland luggage plate, USB power point, iridium spark plug, TKC80 f k60 R tyres, o2 and fuel Kev mods, DNA stage 2 filter. bark buster bar wieghts, Touratec side stand base and GPS mount. Led spot lights