| 摘要 |
It is an object of the present invention to provide a technology that can downsizing a body frame in a vehicle where an upper pipe is disposed immediately above an internal combustion engine. An upper pipe includes a single front pipe portion, a branch portion bifurcated from the rear end of the front pipe portion, and two left and right rear pipe portions extending vehicle-rearward from the branch portion. A cylinder head cover is located between the two left and right rear pipe portions as viewed from above. Therefore, the cylinder head cover can be accessed from above and removed from a cylinder head, whereby a valve train chamber can be inspected and maintained. The upper pipe can be lowered close to the cylinder head cover. Consequently, the downsizing of the body frame can be achieved.
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