A motorcycle that has improved maneuverability and stability at high speed while retaining the external features of an American cruiser motorcycle. A front upper surface of a seat is formed in generally a straight line L.sub.U and inclines upward as the front upper surface extends toward the front. A fuel tank is formed such that the straight line L.sub.U generally extends to the front along a top surface of the fuel tank. A bottom end section is formed to incline upward as it extends toward the rear.