Saddle-ridden type vehicle

A saddle-ridden type vehicle comprising:

• an engine in which a cylinder and a cylinder head are provided above a crank case and a cylinder head cover is provided above the cylinder head;
• a water pump configured to discharge cooling water;
• a water jacket provided in the engine and configured to cool the engine by the cooling water discharged from the water pump;
• a radiator disposed in front of the engine and configured to cool the cooling water having cooled the engine;
• a cooling water flow control unit having a first passage through which the cooling water having cooled the engine flows from the water jacket to the radiator, a second passage through which the cooling water having flowed in the radiator flows from the radiator to the water pump, a bypass passage communicating the first passage and the second passage each other and a thermostat configured to control a flow rate of the cooling water flowing in the radiator;
• an engine outlet piping connecting an outlet of the water jacket and an inlet of the first passage of the cooling water flow control unit therebetween;
• a radiator inlet piping connecting an outlet of the first passage of the cooling water flow control unit and an inlet of the radiator therebetween;
• a radiator outlet piping connecting an outlet of the radiator and an inlet of the second passage of the cooling water flow control unit therebetween;
• and
• a water pump inlet piping connecting an outlet of the second passage of the cooling water flow control unit and an intake port of the water pump therebetween,
• wherein the water pump is disposed at a side part of the crank case and in front of a crankshaft of the engine,
• wherein the cooling water flow control unit is disposed above the cylinder head cover, and
• wherein the radiator inlet piping, the radiator outlet piping and the water pump inlet piping are concentrated in a space between the engine and the radiator.