Air intake system for fuel injection type motorcycle engine

An internal combustion engine having a cylinder head cylinder block assembly defining a combustion chamber, an intake passage extending through one side of said engine and terminating in said combustion chamber for delivering a charge thereto, an intake manifold affixed to said one side of said engine in registry with said intake passage and defining a void area between said one side of said engine and said intake manifold, a fuel injector mounted in said void area for injecting fuel into said intake passage, said fuel injector having a portion extending beyond said one side of said engine and beyond said void area and an air inlet device for supplying air to said intake manifold including a transverse portion extending across the upper end of said portion of said fuel injector toward said one side of said engine and terminating adjacent said one side of said engine and a depending portion depending from said transverse portion and extending along the side of said portion of fuel injector opposite to said intake manifold and terminating adjacent said one side of said engine for substantially enclosing said void area and said fuel injector portion for silencing noise emanating from said fuel injector.