Honda Motor Co., Ltd.

Takeshi Sakai

Satoshi Matsushima

Masashi Furuya

Osamu Emizu

An exhaust pipe structure of a motorcycle allowing exhaust air of an exhaust pipe having a branching part to flow into the respective exhaust pipes on the downstream side of the branching part uniformly and smoothly. In an exhaust pipe structure of a motorcycle having an engine attached to a vehicle body frame, an exhaust pipe is connected to an exhaust port of the engine and is provided with a branching pipe that branches into a left-rear-portion exhaust pipe and a right-rear-portion exhaust pipe. A muffler is connected to the left-rear-portion exhaust pipe. A muffler is connected to the right-rear-portion exhaust pipe. The branching pipe is located on a lateral side of a cylinder unit of the engine and above a crankcase cover.

Exhaust pipe structure of motorcycle

To provide an adequate biasing load to an endless transmission belt by biasing forces of a plurality of springs with different biasing forces and oil pressure biasing force to permit an easy adjustment. In a structure which includes an almost cylindrical plunger, a tensioner body into which the plunger is fitted, high pressure oil chambers are formed by the tensioner body and the plunger and supplied with oil pressure. Two tensioner springs, a rigid spring and a soft spring are supported by the tensioner body and are arranged in series for biasing the plunger. The plunger in its fully stretched state is supported by the serially arranged rigid and soft tensioner springs. In a condition when the plunger is pushed back from this fully stretched state by a prescribed amount or further, the plunger is supported by the rigid tensioner spring.

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Wako, Japan

Takeshi Sakai