ENGINE

An engine includes a cylinder and a cylinder head stacked on an upper portion of a crankcase, an electronically controlled throttle interposed in an intake passage behind the cylinder head, and an exhaust pipe extending rearward from the cylinder head through a side of the cylinder. The electronically controlled throttle includes a throttle valve provided in the intake passage and an actuator that opens and closes the throttle valve. The actuator is disposed on an opposite side of the exhaust pipe with respect to a vehicle center line extending in a vehicle front-rear direction.