Here are some pictures of my ex-Gold Wing fuel tank that I bought awhile back. Now that I do not have the GW anymore I will probably put it up for sale. I even put it on the Rocket two different ways to see if it had any possibilities. It could work but would probably need a fuel pump to get the gas into the tank somehow. The tank capacity is 4.4 gallons and was designed to qualify for Ironbutt rides (I believe maximum fuel capacity allowed is 11 gallons). The second picture is how it would go on a GW.
That's no problem, it was, after all, designed for the Gold Wing. However I did place it both ways on the back seat and the bottom two photos show how it might possibly be used but it would have to be fastened down somewhat as the two "handle" brackets that would fasten easily to a GW just don't do anything for the Rocket.
It is powder coated black and does have baffles inside the tank to prevent the sloshing around of the gas.
Dennis