Honda Motor Co., Ltd.

Satoru Yamasaki

Shinya Koyama

Hiroshi Mahira

Yasuhiro Morimoto

An exhaust pipe structure for an in-line four-cylinder internal combustion engine includes: an in-line four-cylinder internal combustion engine; four exhaust pipes connected with respective exhaust ports in respective cylinders of the internal combustion engine; and a converging exhaust pipe connected with a converging portion at which downstream ends of all the exhaust pipes converge. In this exhaust pipe structure, the exhaust pipes are each configured as a dual pipe including an outer pipe and an inner pipe disposed inside the outer pipe. At the converging portion, the four exhaust pipes are arrayed linearly in parallel with each other, and the outer pipes of adjacent ones of the exhaust pipes are directly welded with each other at the downstream ends.

Exhaust pipe structure for in-line four-cylinder internal combustion engine

An air cleaner is arranged below a fuel tank of a straddle type disposed above left and right main frames. The air cleaner includes a main chamber which is located between the main frames, and a sub-chamber which is located on the outside in the vehicle width direction of the main frames. A rear section of the sub-chamber and a rear section of the element within the sub-chamber are located in a space formed between each outside wall surface of the main frames and an inside wall surface of the fuel tank. A front section of the sub-chamber and a front section of the element project forwardly of the fuel tank in a side view of the vehicle. The front section of the sub-chamber is provided with the fastening means for fastening the side cover (the element lid) which covers the element from the outside in the vehicle width direction.

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Wako, Japan

Satoru Yamasaki