| 摘要 |
PROBLEM TO BE SOLVED: To adapt a muffler to an off-road type motorcycle by arranging anteriorly the same. SOLUTION: The exhaust structure comprises: a down frame 5 disposed obliquely downward from a head pile 2 anteriorly to an engine 7; and a lower frame 6 extending rearward on the lower side of the engine 7 by connecting the same to its lower end part. The muffler 21 is arranged in the vicinity of a connection part of the down frame 5 and the lower frame 6. Then, the rear surface thereof is bent forward to be convex so as to be along the down frame 5 and the lower frame 6. An exhaust pipe 20 extending from a cylinder hear 11 is made to be substantially S shaped from a side view. A forward bent part 40 and a rearward bent part 41 are arranged above and below to connect the lower end part to a bottom part of the muffler 21. COPYRIGHT: (C)2007,JPO&INPIT
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