So I recently acquired a 86' vf1000r. It has sat for quite some time. The gas tank has corroded on the inside and i plan to use muriatic acid to strip the rust on the inside of the tank. However, I have rinsed the inside of the tank and no liquid flows out of the fuel line hook up at the bottom of the tank. I have turned the petcock to on, off and, reserve and have not been able to get anything flow out of the tank. Is it clogged with rust? I am able to blow air in it and it feels like it goes through to the tank. How can i get liquid to flow through the tank?