Air/Liquid-cooled Four Stroke Flat Twin Engine, Double Overhead Camshaft, One Balance Shaft and Variable Engine Timing System BMW Shiftcam. Testastretta 11° L-Twin, 4 Desmodromically Actuated ...

Water/oil-cooled in-line four-cylinder, four-stroke engine with four titanium valves per cylinder and BMW Shiftcam variable intake camshaft control V4 Granturismo, 4 valves per cylinder ...