Abstract: A lubrication system with oil recovery for a two-stroke engine piston with pump-sump for scavenging, said system consisting of a lubicating oil pressure circulation system having inlet and outlet holes for the oil, said holes passing through the wall of the cylinder, and of shaped scraper rings, each ring being housed within a circular housing or seat obtained on the outside skirt of the piston, said circular housings being provided on the skirt of the piston at a height which does not allow any overlapping of said scraper rings on the transfer ports of the two-stroke engine.