CB750
The Honda CB750 is an air-cooled, transverse, in-line four-cylinder engine motorcycle made by Honda over several generations for year models 1969–2003 as well as 2007 with an upright or standard riding posture. It is often called the original Universal Japanese Motorcycle 
https://en.wikipedia.org/wiki/Honda_CB750
This differs from the honda_cb750f as it has "4 into 4" exhaust, where as the honda_cb750f has "4 into 1" exhaust
honda cb750k