Variable valve timing system

A vehicle comprising:

• a vehicle body frame and an engine in which a cylinder head is fixed on a cylinder, a lower surface of the cylinder head abuts the cylinder, and the cylinder head is suspended on the vehicle body frame;
• a variable valve device configured to change an opening and closing timing of a valve according to a hydraulic pressure;
• and
• an oil control valve configured to control the hydraulic pressure with respect to the variable valve device, wherein
• the vehicle body frame includes a main frame configured to laterally cover a rear side of the cylinder head and a down frame configured to laterally cover a front side of the cylinder head,
• in a side view of the vehicle, the oil control valve is detachably disposed on an outer surface of the engine below an area surrounded by the main frame, the down frame, and the lower surface of the cylinder head,
• a front part of the cylinder head is suspended on a lower end of the down frame
• a heat exchanger is disposed in front of the engine, and a cooling fan is attached to a rear surface of the heat exchanger, and
• in the side view of the vehicle, the lower end of the down frame is positioned on an extension line extending from a lower end of the cooling fan in a blowing direction of the cooling fan, and the oil control valve is positioned below the extension line.