Frame structure for motorcycles has front half frame with main frames, head tube, and cross element, and rear half frame with central frame, pivot arm joint, and rear wheel link

摘要

The frame structure has a pair of left and right main frames (51), which project backwards from a header tube (12), and a cross element (52) between the rear ends of the main frames. A single central frame (53) extends downwards from the cross element. A lower engine bearing support (54) is connected to the lower end of the central frame. A pivot arm joint (19) is located on the central frame or the engine bearing support.