The bikes feature a new straight-six engine which is mounted transversely across the chassis . The cylinders are angled forward by 55 ° . The engine was originally used on the Concept 6 , a concept bike that was shown at the 2009 EICMA Milan Motor Show . BMW claims that the engine , which at wide is just wider than the K1300 engine , is the narrowest in-line six-cylinder engine ever produced . Cylinder bore is and the distance between cylinder centres . The camshafts are hollow , with cam lobes pressed on , which saves around . The engine has electronic throttle control and multiple drive modes which can be set according to road conditions
EICMA Milan Motor Show
EICMA
BMW K1600