ENGINE AND SADDLE-TYPE VEHICLE AND METHOD OF ATTACHING THE CHAIN

An arrangement is provided using a blade tensioner to tension a 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 member (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 crankcase (84). The support member (170) is provided on a head cover (130) and supports the tensioner (158) in such a way that the contact portion (178) is slidable.