Air intake structure for motorcycle

An air intake structure for a motorcycle having a body frame including a hollow head member provided in a front wall of the body frame, the hollow head member being provided with an air inlet opening, and a head pipe located in a center of the hollow head member for supporting a steering shaft, the body frame further including paired, right and left hollow main frame members extending rearward from the hollow head member on right and left sides, respectively, of the motorcycle, the air intake structure comprising:

• an air cleaner disposed behind the hollow head member;
• an inlet duct having an open front end that opens forward, and an open rear end that connects to the air inlet opening of the head member;
• and
• an intake duct inserted within the hollow main frame members,
• wherein the intake duct has a front part, a front end and a rear part,
• wherein the front part extends toward the head pipe but not forwardly thereof and into both of the hollow main frame members and the hollow head member,
• wherein the intake duct has the front end with an opening that opens near the head pipe so as to communicate with an air intake path formed at both sides of the head pipe,
• wherein the rear part extends outside of the body frame and connects to an air inlet opening of the air cleaner disposed outside of the body frame.