Patent ID: 8939255
Filing Date: 2015-01-27
Classification: B62K,F01N

Abstract:
1. A motorcycle comprising: an engine including an exhaust port; a first silencer; a second silencer separate from the first silencer; a first exhaust pipe connecting the exhaust port and the first silencer; and a connecting pipe portion connecting the first silencer and the second silencer; wherein the first silencer includes: a first expansion chamber to allow exhaust to expand, the first expansion chamber being located downstream of the first exhaust pipe in an exhaust flow; and a second expansion chamber to allow exhaust to expand, the second expansion chamber being partitioned from the first expansion chamber, the second expansion chamber being located farther downstream than the first expansion chamber; and the connecting pipe portion includes: a second exhaust pipe connected to the first expansion chamber; an exhaust control valve to control a flow passage area of the second exhaust pipe, the exhaust control valve being located in the second exhaust pipe; and a third exhaust pipe connected to the second expansion chamber.