Patent ID: 8292017

Claim:
A motorcycle in which a pair of left and right main frames extends obliquely downward and rearward in a longitudinal direction of the motorcycle from a head pipe, a swing arm is swingably connected to rear portions of the main frames, a rear wheel is rotatably mounted on the swing arm, an internal combustion engine is arranged below the main frames, an exhaust pipe extends frontward in the longitudinal direction of the motorcycle from the internal combustion engine, turns backward, and extends rearward in the longitudinal direction of the motorcycle through the left and right main frames, and a silencer is connected to a rear end of the exhaust pipe, wherein the silencer comprises: a front cup, as viewed in a side view of the motorcycle, has a front end thereof arranged in the vicinity of the main frames, has a tapered tubular shape where a cross-sectional area is increased rearward in the longitudinal direction of the motorcycle, has a rear end thereof arranged in front of a position of an axle when the swing arm is fully bent in the longitudinal direction of the motorcycle, and accommodates a front pipe connected to the exhaust pipe therein; a center sleeve which extends rearward in the longitudinal direction of the motorcycle from the rear end of the front cup and accommodates an inner pipe having a porous tubular shape connected to the front pipe therein; and a tail cup which extends rearward in the longitudinal direction of the motorcycle from a rear end of the center sleeve and accommodates a tail pipe connected to the inner pipe therein.