Saddle type fuel tank

A saddle type fuel tank comprising:

• a saddle type tank body for storing fuel to be supplied to an internal combustion engine mounted on a vehicle, in a chamber having a saddle-shaped portion between a first chamber and a second chamber;
• and
• a full-tank regulating valve communicatively connected to an exhaust passage for discharging vaporized fuel generated in the tank body to a canister and provided at the saddle-shaped portion in the chamber of the tank body, wherein the full-tank regulating valve comprises:
• a valve body;
• a float valve provided inside the valve body and operated to open or close a communication port of the exhaust passage based on a pressure difference between an internal pressure of the valve body and an internal pressure of the tank body;
• a first hanging pipe communicatively connected to the valve body and extending to hang down offset toward the first chamber, and having a first opening at a hanging end thereof;
• and
• a second hanging pipe communicatively connected to the valve body and extending to hang down offset toward the second chamber, and having a second opening at a hanging end thereof, and wherein
• the first opening of the first hanging pipe is located at a height corresponding to a full-tank liquid level in the first chamber, and
• the second opening of the second hanging pipe is located at a height lower than that corresponding to a full-tank liquid level in the second chamber and is provided with an on-off valve for opening and closing the second opening based on a height of a fuel liquid surface.