The F800S was a sport bike made by BMW Motorrad from 2006 to 2010. Along with the closely related sport touring F800ST, other bikes in the F-bike range are the dual-sport F800GS, and the naked F800R. BMW developed with Rotax a 798 cc (48.7 cu in) parallel-twin engine with a 360 degree firing order. This produced an exhaust note reminiscent of BMW's signature air-cooled boxer twins. However, this firing order required both pistons to move up and down at the same time. To counter the significant inertia produced by the pistons reciprocating, BMW devised a third vestigial connecting rod to a balance weight. The result was a parallel twin with significantly reduced vibration compared with other parallel twin engine designs. The engine was oiled by a dry sump system, and a soft ignition-cut rev