ENGINE AND SADDLE-TYPE VEHICLE

摘要

To provide an engine that allows a cam chain to be easily attached. A crankcase (84) includes a support shaft (240) that supports a tension providing member (158) in a swingable manner and a provisional support shaft (252) that is positioned on the opposite side to a second sprocket (146) with respect to a straight line (L2) that connects a center of the support shaft (240) and a center of a first sprocket (108) when viewed in an axial direction of the crankshaft (84) and supports the tension providing member (158). A chain chamber (210) includes a provisional support surface (213) that contacts a part of the tension providing member (158) and supports the part in a slidable manner while the tension providing member (158) is supported by the provisional support shaft (252). The provisional support shaft (252) is positioned more on the side of the provisional support surface (213) than a part of the chain (154) wrapped around the first sprocket (108) when viewed in an axial direction of the crankshaft (84).