AIR-COOLED SINGLE-CYLINDER ENGINE, AND SADDLED VEHICLE

摘要

The purpose of the present invention is to further reduce the consumption amount of lubricating oil while suppressing production costs, in an air-cooled single-cylinder engine. This air-cooled single-cylinder engine (12) includes: a fin section (54) having a plurality of fins provided to the outer surface of a cylinder body (21); and an oil jacket (50b) which is provided to the cylinder body (21), is formed in a peripheral range around a cylinder axis line (C1), said peripheral range being smaller than that of the fin section (54), is provided to the outside of a cylinder hole (50a), and has lubricating oil flowing therein while being in state of being filled with the lubricating oil. The air-cooled single-cylinder engine (12) is provided with an oil-evaporation-inhibiting section which inhibits evaporation of the lubricating oil at the inner wall surface of the cylinder hole (50a).