Cylinder head cooling system

A motorcycle comprising:

• a frame;
• an engine having a V-twin configuration coupled to the frame;
• right and left engine guards coupled to the frame forwardly of the engine and extending laterally outwardly from the frame;
• right and left leg shields coupled to the right and left engine guards, respectively;
• a liquid cooling circuit in communication with the engine;
• a thermostat valve and a water pump in fluid communication with the liquid cooling circuit;
• wherein the liquid cooling circuit further includes a supply header running from the water pump to the engine and a return header running from the engine to the thermostat valve, wherein the liquid cooling circuit includes a pair of supply branch lines running from the supply header to each of a first cylinder head and a second cylinder head of the V-twin engine and a pair of return lines running from the first and second cylinder heads to the return header;
• right and left radiators in fluid communication with the liquid cooling circuit and positioned within the right and left leg shields, respectively;
• wherein the thermostat valve is configured to selectively bypass at least one of the right and left radiators depending upon a sensed temperature of liquid coolant within the liquid cooling circuit, and wherein the water pump is positioned between the right and left leg shields, at an elevation substantially lower than the right and left radiators when the motorcycle is in an upright position;
• and
• wherein the right and left leg shields include a right duct and a left duct, respectively, wherein the right duct is configured to direct air received from the right radiator away from the motorcycle, and wherein the left duct is configured to direct air received from the left radiator away from the motorcycle.