Attached is the frame of GL1000 which I searched on the net. Seems Honda bikes of this era were designed with the same concept. The steering neck is ball and lace which is not very durable. I want to replace with roller bearings. The steel pipe double cradle looks light and the rear is normal swing arm and shock strut. The gas tank is installed under the seat, so it's wide overall. Since the gas level is below the carburetor, it is mechanically pumped. The engine can be easily lowered by removing the left subframe, I like this structure.