Patent ID: 7350351
Filing Date: 2008-04-01
Classification: F01N

Abstract:
1. An exhaust system of an engine of a motorcycle, comprising: an exhaust pipe configured to extend in one of an upward direction and a downward direction from an exhaust port formed at a front portion of a cylinder head of the engine and to then be bent to extend in an opposite direction to form a bent portion at a location in front of the engine, wherein the bent portion includes a lower bent portion and an upper bent portion located above the lower bent portion, the exhaust pipe extending in the downward direction and then being bent to extend in the upward direction to form the lower bent portion, the exhaust pipe extending in the upward direction and then being bent to extend in the downward direction to form the upper bent portion; wherein the exhaust pipe is configured to extend downward from the exhaust port, upward from the lower bent portion, downward from the upper bent portion and then rearward; the exhaust pipe extending in the upward direction and then in a lateral direction and then being bent to extend in the downward direction to form the upper bent portion.