Abstract: A technique for suppressing vibrations generated in an air cleaner thus suppressing noise caused by the vibrations to a low level while reducing an increase in the number of parts. A motorcycle includes a seat frame, an air cleaner mounted on the seat frame and a body cover for covering the outside of the air cleaner. The body cover includes an upper body cover and a lower body cover formed by vertically dividing the body cover on a side of the air cleaner. An elastic member is sandwiched between the lower body cover and a side wall of the air cleaner. A wall member for partitioning the elastic member and a muffler from each other is mounted on the lower body cover.

Abstract: An exhaust system for an engine includes an exhaust pipe connected to an exhaust port of an engine and a muffler attached to the exhaust pipe and configured to reduce exhaust noise. The muffler includes an inner cylinder part connected to the downstream end of the exhaust pipe, an outer cylinder part configured to cover an outside of the inner cylinder part and noise absorbing materials disposed between the inner cylinder part and the outer cylinder part. A plurality of first communication holes providing communication between an inside and an outside of the inner cylinder part is formed in an upstream portion of the inner cylinder part. A plurality of second communication holes providing communication between the inside and the outside of the inner cylinder part is formed in a downstream portion of the inner cylinder part. Guide walls extend toward the inside of the inner cylinder part.

Abstract: A technique for suppressing vibrations generated in an air cleaner thus suppressing noise caused by the vibrations to a low level while reducing an increase in the number of parts. A motorcycle includes a seat frame, an air cleaner mounted on the seat frame and a body cover for covering the outside of the air cleaner. The body cover includes an upper body cover and a lower body cover formed by vertically dividing the body cover on a side of the air cleaner. An elastic member is sandwiched between the lower body cover and a side wall of the air cleaner. A wall member for partitioning the elastic member and a muffler from each other is mounted on the lower body cover.