Patent ID: 8668218

Claim:
A vehicle body frame of a motorcycle comprising: a head pipe for steerably supporting a front fork for pivotally supporting a front wheel and a steering handle; a pair of left and right main frames extending rearwardly and downwardly from the head pipe; and a down frame extending rearwardly and downwardly from the head pipe at an angle steeper than an angle at which the main frames extend rearwardly and downwardly; wherein the head pipe includes, as integral parts thereof, a pipe portion extending in a first upward direction, and a bracket portion which is contiguously formed on a rear portion of the pipe portion in a state where front end portions of the main frames are jointed to the bracket portion and a front end portion of the down frame is joined to the bracket portion below the front end portions of the main frames; the main frames are joined to the bracket portion in a state where a widthwise center line of the main frames in a second upward direction is directed towards an intermediate portion of the pipe portion in the first upward direction as viewed in a side view, and an upper surface extension line and a lower surface extension line which are on an extension in a frontward direction of an upper surface and a lower surface of the main frames pass between an upper end and a lower end of the pipe portion as viewed in a side view; and a front end portion of the down frame, inclined so as to be directed to the intermediate portion of the pipe portion in the first upward direction, is joined to the bracket portion below the front end portions of the main frames as viewed in a side view.