Honda Giken Kogyo Kabushiki Kaisha

Ryoji Nakajima

Hiroshi Okazaki

Hajime Yamada

A frame structure for a motorcycle provided with a sub-frame extending forwardly from pivot plates fixed at the lower ends of a main frame. The sub-frame includes a U-shaped member having right and left opening ends thereof connected to the pivot plates at the lower ends of the main frame. The sub-frame extends approximately horizontally and forwardly from the connecting portions so that the front end portion of the sub-frame is not connected to the down frames.

Frame structure for a motorcycle

To provide an exhaust pipe structure capable of arranging a plurality of exhaust pipes in a restricted space inside a cover and suppressing the discoloring of the cover due to an increase in the temperature of the cover. Each of a plurality of exhaust pipes introduced from each cylinder of a multi-cylinder engine includes a double-pipe structure of an outer pipe and an inner pipe. The exhaust pipes pass inside the cover in such a manner that at least one exhaust pipe near the inner side surface of the cover is left as being of the double-pipe structure, and at least each of the remaining exhaust pipes has a portion of a single-pipe structure.

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Saitama, Japan

Ryoji Nakajima