Motorized two-wheeled vehicle with novel disposition of fuel tank and parts housing

In a motorized two-wheeled vehicle having a frame, a front wheel, a rear wheel, a driver's seat at the upper middle portion of the frame, a steering handle at the front portion of the frame, an internal combustion engine mounted on said frame, and a fuel tank mounted on said frame below said seat, an improvement comprising a housing secured to the frame between the seat and the steering handle at a location above the engine such that the engine is exposed therebeneath, said housing being adapted for enclosing various parts therein, said housing having at least one chamber with an upper surface, an upper cover pivotably mounted at said upper surface to be opened upwards, said housing being open at its bottom surface, said parts in said housing including an air cleaner connected to the internal combustion engine below said housing and introduced into the housing through the open bottom surface.