| 摘要 |
An arrangement is provided for supporting a rocker shaft in an engine so as to allow installation of the rocker shaft without incurring high costs, and, thereby, using a simple arrangement. An engine is equipped with valve-moving devices such as a cam shaft 21 inside a cylinder head 8, intake and exhaust valves, intake and exhaust cams 24 and 25, intake and exhaust rocker arms, a rocker shaft 28 which supports these rocker arms with freedom to rotate, and the like, and wherein bearing bosses 31a to 31d for supporting the cam shaft 21 are formed inside the cylinder head 8, flat seats 50 are formed on the bearing bosses 31a to 31d, and flat seats 51 are formed on the rocker shaft 28, and the rocker shaft 28 is fitted on the bearing bosses 31a to 31d with the two eats 50 and 51 matched against each other.
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