Vehicle body frame structure of saddle-riding type vehicle

A vehicle body frame structure for a saddle-riding type vehicle, the vehicle including:

• a pair of left and right main frames that extend rearwardly from a head pipe;
• an engine disposed downwardly of the left and right main frames;
• a fuel tank disposed upwardly of the engine and between the left and right main frames;
• and
• a pair of left and right engine hangers that extend downwardly from front portions of the left and right main frames, the engine hangers being configured to support the engine, the vehicle body frame structure comprising:
• a cross member that connects the left and right engine hangers in a vehicle width direction,
• wherein the main frames include connection holes formed therein, the connection holes being configured to connect with intake system ducts, and the cross member is disposed downwardly, or downwardly and rearwardly, of the connection holes.