EXHAUST SILENCER FOR INTERNAL COMBUSTION ENGINE

摘要

An exhaust silencer for an internal combustion engine where a plurality of expansion chambers are defined by a plurality of bulkheads within a main body and a spark arrester equipped with a tail pipe is provided in a detachable manner at a rear part of the main body provides compatibility at all times with use on public roads or in racing and for which performance is improved in response to these objects. A structure is adopted where, at the time of installing a spark arrester, an exhaust flow is made to pass through at least one bulkhead three times due to the tail pipe and a plurality of communicating pipes, and when a spark arrester is detached, the exhaust flow flows through communicating pipes so as to bypass one of the plurality of expansion chambers and be discharged to outside.