Patent ID: 8028798

Claim:
An exhaust-pipe structure for saddle-ride type vehicle, comprising: a single silencer connected to downstream ends of a plurality of exhaust pipes led from respective cylinders of a multicylinder engine, the single silencer having a plurality of chambers that are equal in number to the respective cylinders of the multicylinder engine, said plurality of exhaust pipes opening into said plurality of chambers, a separator which divides said single silencer into said plurality of chambers, catalyst units provided in each of said plurality of chambers, and a communication hole opened at a position rearward of the catalyst units to allow communication of an exhaust gas between said plurality of chambers, wherein the plurality of chambers have different capacities from each other, wherein the multicylinder engine is a V-type engine having a crankshaft extending in a vehicle-width direction and having a front cylinder and a rear cylinder, wherein a capacity of a chamber corresponding to the front cylinder is larger than a capacity of a chamber corresponding to the rear cylinder, wherein said chamber corresponding to the front cylinder of the multicylinder engine includes a protruding portion which protrudes towards said chamber corresponding to the rear cylinder of the multicylinder engine, such that a capacity of said chamber corresponding to the front cylinder is different from a capacity of said chamber corresponding to the rear cylinder, and wherein said separator includes through holes which allow communication between (i) said protruding portion which protrudes towards said chamber corresponding to the rear cylinder of the multicylinder engine and (ii) a non-protruding portion of said chamber corresponding to said front cylinder of the multicylinder engine.