A friend of mine owns a 2012 GS 1200 which has 15 000km on the clock by now. On a recent trip in the Tankwa Karoo near Ceres he ended up with a broken swing arm. It happened on quite a good gravel road(road between Ceres en Calvinia). We were 8 bikes in total, of which 5 were BMW's and no one had any problems accept his bike. Is this a common problem on a GS or was he just unlucky?