Honda Giken Kogyo Kabushiki Kaisha

Hitoshi Kashiwagi

Yukio Miyamaru

Kazuyuki Iwata

Takaji Mukumoto

Yasushi Takahashi

Katsuhito Aoki

Hirotoshi Kizawa

Keigo Yoshida

Mutsuo Nakajima

Takashi Ichizawa

Toshihiro Hijikata

Hiroaki Jinno

Hidehiko Numata

Isao Fujita

Goro Yamasaki

Compactness is enhanced while retaining the performance, noise deadening characteristic and engine output. The ratio of the distance, a, from a gas outlet end, p, of an exhaust pipe to an inner wall of a rear partition wall to an inside diameter &empty;A of the exhaust pipe is set in a relation of 0.6&lE;(a/&empty;A)<1.2, while the ratio of the distance, b, from a gas inlet end, q, of a tail pipe to an inner wall of a front partition wall to an inside diameter &empty;B of the tail pipe is set in a relation of 0.4&lE;(b/&empty;B)<1.2, to afford a silencer having an optimum combination of engine output characteristic and compactness while retaining a noise deadening effect.

Silencer for internal combustion engine

A riding simulation system of motorcycle provides at least a model motorcycle on which a person can ride and which can be operated by a person. In response to the operation and movement of the person who rides on the model motorcycle, the model motorcycle is moved by a movable mechanism in a desirable direction such as a yawing direction, a rolling direction and a pitching direction. Preferably, the moving image such as the scenery which is seen from the running motorcycle is displayed in front of the person who rides on the model motorcycle. Such moving image is varied in response to the driving condition of the model motorcycle.

Riding simulation system of motorcycle

Growing community of inventors

Saitama, Japan

Hitoshi Kashiwagi