ENGINE AND SADDLE-TYPE VEHICLE

An arrangement is provided using a blade tensioner that serves as both a tensioner and a cam chain guide to tension the cam chain, where the cam chain can be easily attached to an engine having a cylinder body that does not have a side that can be opened. A tensioner (158) has a leaf spring (166) and a blade shoe (168) that supports the leaf spring (166) and may contact the cam chain (154) in a chain room. An engine (44) includes a bolt (164) that can be inserted into a support hole (250) formed in the tensioner (158) and can swingably support the tensioner (158), and a support pin (170) that can contact a contact portion (178) of the blade shoe (168) to support the tensioner (158). The bolt (164) is provided in a cylinder head (128). The support pin (170) is provided in a crankcase (84) and supports the tensioner (158) in such a way that the contact portion (178) is slidable.