Motorcycle engine exhaust system
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsKazuhiko Nomura, Satoru Ichikawa
Life of this patent
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Abstract
A motor cycle includes a frame, a front and rear wheel, and an engine mounted to the frame which has at least two exhaust pipes. A muffler is mounted to the frame beneath the engine, and both exhaust pipes discharge into the muffler. At least one tailpipe exhausts from the muffler. The silencing volume of the muffler can enable a shorter-than-usual tailpipe to be used, which need not interfere with access to the rear wheel axle.
Claims14
An engine exhaust system for a motorcycle of the type having a frame, a front and rear wheel mounted to said frame, a V type engine with at least two cylinders arranged to form a "V", and arranged forwardly and rearwardly relative to one another, said exhaust system comprising:
- a muffler mounted to said frame underneath said engine, said muffler having an expansion chamber, a forward exhaust pipe extending from the forwardmost cylinder forwardly and downwardly to discharge into said expansion chamber, a rearward exhaust pipe extending from the rearwardmost cylinder downwardly to discharge into said expansion chamber, and a tailpipe having a volume and a dimension of length, exhausting from said muffler, said forward exhaust pipe and tailpipe, where they respectively enter and leave said muffler, being substantially coaxial, said rearward exhaust pipe passing downwardly rearwardly of said engine and forwardly of said rear wheel.
An engine exhaust system for a motorcycle of the type having a frame, a front and rear wheel mounted to said frame, said rear wheel being mounted to said frame by a pair of laterally spaced-apart rearwardly extending arms which are pivoted to said frame by a pivot, a V type engine with at least two cylinders arranged to form a "V", and arranged forwardly and rearwardly relative to one another, said exhaust system comprising:
- a muffler mounted to said frame underneath said engine, said muffler having an expansion chamber, a forward exhaust pipe extending from the forwardmost cylinder forwardly and downwardly to discharge into said expansion chamber, a rearward exhaust pipe extending from the rearwardmost cylinder downwardly between said rearwardly extending arms, rearwardly of said pivot and forwardly of said rear wheel, to discharge into said expansion chamber, and a tailpipe having a volume and dimension of length, exhausting from said muffler.
Dependencies are inferred from the claim text.