Yamaha Hatsudoki Kabushiki Kaisha

Katsumi Fujimura

Yasutaka Yoshida

Daisuke Hamada

Masahito Kawase

Katsuyoshi Ooishi

An engine of a straddle-type vehicle includes first, second, and third cylinders arranged, in this order, from right to left in a front view of the vehicle; first, second, and third intake pipes in communication with the first, second, and third cylinders, respectively; and first, second, and third exhaust pipes in communication with the first, second, and third cylinders, respectively. The first, second, and third exhaust pipes have different lengths and the first, second, and third intake pipes have different lengths.

Straddle-type vehicle

A motorcycle without increased size in a direction in which moving funnels move straight. The moving funnels and stationary funnels lead air to an engine. A funnel moving mechanism includes a turning member for movement of the moving funnels, and a motor for driving the turning member. The moving funnels are moved straight in a predetermined direction between separated positions, in which openings of the moving funnels are separated from openings of the stationary funnels, and abutment positions, in which the openings of the moving funnels abut the openings of the stationary funnels. A direction in which the motor and the turning member are arranged intersects a predetermined direction in which the moving funnels are moved.

Vehicle

A vehicle having moving funnels separated from stationary funnels that suppresses any decrease in intake efficiency. The moving funnels are arranged on an intake side of the stationary funnels to lead air to an engine. A funnel holding section holds the moving funnels and includes opened holes. The moving funnels are moved straight between separated positions in which openings of the moving funnels are separated from openings of the stationary funnels, and abutment positions in which the openings of the moving funnels abut against the openings of the stationary funnels. The opened holes pass air on an upstream side to a downstream side.

Growing community of inventors

Shizuoka, Japan

Katsumi Fujimura