| 摘要 |
A vehicle, such as a motorcycle, can include an engine, an exhaust pipe, and a silencer. The silencer can include a main body and first and second pipes. An upstream end of the first pipe can be connected to the exhaust pipe, and be provided in the main body. The second pipe can be provided apart from the first pipe on the downstream side of the first pipe, coaxially with the first pipe, and extending through a downstream lid of an outer tube of the main body. The downstream portion of the first pipe can have an inner diameter that gradually decreases from the upstream side toward the downstream end. The upstream end of the second pipe can be provided in the main body and have a larger inner diameter than the inner diameter of the downstream end of the first pipe.
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