What kind of engine does the BMW R 1250 GS have, and how does it contribute to the bike's performance?

The BMW R 1250 GS is equipped with a powerful and efficient 1,254cc liquid-cooled boxer engine. The engine features BMW's ShiftCam technology, which varies the valve lift to optimize performance and fuel efficiency across a range of engine speeds. This contributes to the bike's excellent acceleration and responsive throttle, while also improving fuel economy and emissions.