Honda Motor Co., Ltd.

Takeo Yokoyama

Masashi Hagimoto

Yoshiyuki Kurayoshi

Makoto Oono

Makoto Nagayama

Takanori Okuma

Masato Nakata

Shinichi Kokubu

Sumio Suzaki

To provide a vehicle body frame structure of a saddle-riding type vehicle that can increase the capacity of an air cleaner and enhance the bending stiffness of the vehicle body frame. The vehicle body frame structure includes a pair of left and right main frames that extend rearwardly from a head pipe, an engine disposed downwardly of the left and right main frames, a fuel tank disposed upwardly of the engine and between the left and right main frames, a pair of left and right engine hangers that extend downwardly from front portions of the left and right main frames and support the engine, and a cross member that connects the left and right engine hangers in a vehicle width direction.

Vehicle body frame structure of saddle-riding type vehicle

To provide a swing arm pivot structure for a motorcycle which can prevent rubbing between a swing arm and a body frame with a simple structure and can reduce a manufacturing cost for the motorcycle. The swing arm pivot structure includes a swing arm for supporting a rear wheel, a pivot shaft mounted to a body frame and inserted through a swing arm pivot of the swing arm, a first bearing located between one end portion of the swing arm pivot and the body frame for pivotably supporting the swing arm, a first collar located between the inner circumference of the first bearing and the pivot shaft, and a second collar located between the first collar and the body frame. The second collar has a rigidity different from the rigidity of the first collar and the body frame.

Swing arm pivot structure for motorcycle

To provide a seat cowl structure of a saddle-riding type vehicle that can reduce weight of a seat cowl support structure, while achieving stiffness to support an occupant load. The seat cowl structure includes a pair of left and right seat rails and a stiffness portion. The pair of left and right seat rails extends rearwardly from a vehicle body frame and is disposed inside a seat cowl. The stiffness portion connects between seat cowl fastening portions of the left and right seat rails in a vehicle width direction and is disposed inside an upper surface portion and side surface portions of the seat cowl.

Seat cowl structure of saddle-riding type vehicle

A motorcycle is provided having an engine disposed between a front wheel and a rear wheel and functional components, e.g., a first radiator, a fuel pump, a rear shock absorber, etc., are arranged, as viewed from the side, on a circumference of a circle with a radius R corresponding to a distance from a crankshaft, serving as a center, to a corner of an oil pan, serving as a part of the engine most distant from the crankshaft, to concentrate the functional components of the motorcycle at positions substantially equidistant from the crankshaft of the engine whereby a mass concentration toward the vehicle body center of a motorcycle is achieved.

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Saitama, Japan

Takeo Yokoyama