| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve engine maintainability while securing the straight advancing stability and operation stability of a vehicle and the strength and rigidity of a vehicle body frame. <P>SOLUTION: The two-wheeled motor vehicle includes, in a frame head part 12 located in a vehicle front part: a vehicle body frame 11 to which the front ends of a pair of main tubes 13 extending to a vehicle body rear side are connected; an engine 17 mounted on the vehicle body frame 11; and an air box 18 disposed on the upper part of the engine 17 to guide intake air to the engine 17. The frame head part 12 of the two-wheeled motor vehicle has: a shaft support part 19 for supporting a steering shaft; and a box-shaped box part 20 fixed to the shaft support part 19, the front ends of the main tubes 13 being connected to the box part 20. In the box part 20 of the frame head part 12, in a vehicle plan view, a recess 54 is formed in a region roughly overlapping the axis P of an ignition plug 44 disposed in the cylinder head 36 of the engine 17. <P>COPYRIGHT: (C)2013,JPO&INPIT |
