You’ve got to hand it to BMW. It’s the master of big adventure bikes and, arguably, the originator of the sector, having brought this world to life back in 1980 when an ‘out of the box’ engineer decided to go rogue and give an R 80 the daddy-long-legs treatment. The result? Well, a gangly R 80, dubbed the R 80 G/S. It was a bike that would go on to spawn imagination, adventure, and several Dakar wins. Perhaps even more importantly, it would form the foundation of the German brand’s bestselling family of two-wheelers, the GSs, which has topped most large-capacity sales charts for the last 20 years. In a nod to that intrepid forefather, BMW has released this air-cooled, 1170cc, modern-day interpretation that I was lucky enough to hit…