A system for discharging exhaust air from a radiator in a straddle type vehicle (e.g., a motorcycle) is provided that can discharge heated air from the radiator to the outside of the vehicle in an efficient manner. The system comprises a radiator that can be positioned farther forward than an engine in the straddle type vehicle. A front cowl at least partially covers the front portion of the vehicle, including the radiator and engine. The front cowl comprises at least one vent passage for receiving outside air and directing such air rearward and at least one discharge port for discharging exhaust air from the radiator. Because of a pressure difference occurring due to high-speed air current flowing along the at least one vent passage, the heated exhaust air can be positively discharged from the radiator through the at least one discharge port.