The applicant's U.S. Pat. No. 4,399,778 describes a method of operating a two-stroke or two cycle high torque and high speed gasoline or diesel fueled multi-cylinder internal combustion engine utilizing an air blower or turbo charger combination connected in series, and having a new and improved design of the internal moving parts, more specifically the scavenging valves which are opened and closed by the wide area of cam lobes of a cam shaft and related mechanisms all assembled in the cylinder head. Also of importance is the piston assembly having a novel feature of design. A recirculating type constant pressure lubrication system is used to lubricate all the vital and critical moving parts, making this invention an efficient device.