Saddle-ride type vehicle

A saddle-ride type vehicle in which a single-cylinder engine main unit is mounted on a body frame, the engine main unit having:

• a crankcase;
• a cylinder body rising upward from an upper portion of the crankcase;
• a cylinder head connected to an upper portion of the cylinder body;
• and a head cover connected to an upper portion of the cylinder head, the cylinder head includes a front wall connected to an exhaust system and a rear wall connected to an intake system,
• wherein a joining surface of the cylinder head to the head cover is formed on a plane crossing a cylinder axis, the plane being inclined downward toward a front,
• rotation axes of camshafts are arranged on the plane, the rotation axes of camshafts configuring a part of a valve train opening/closing an intake valve and an exhaust valve respectively supported by the cylinder head,
• an axis of a valve stem of a butterfly throttle valve is arranged on the plane, the butterfly throttle valve being provided to a throttle device configuring a part of the intake system,
• a curve cover is formed on one side in a vehicle width direction of the head cover, the curve cover being curved to cover driven sprockets that are fixed to the camshafts so that a cam chain for transmitting power from a crankshaft to the camshafts is wound around the driven sprockets, and
• a drum housing box is arranged close to the curve cover, the drum housing box housing a throttle drum fixed to one end of the valve stem, the drum housing box being annexed to the throttle device.