Hi everyone. I have a 1980 xs400 special. At the risk of sounding even dumber than I have in the past, here is another question. I think my neighbor has this so backwards I cant figure out what is right. Could someone please send me a pic of the petcock in the prime position and in the reserve position. I think I may have a simple solution. As usual thank you for your input, and have a great day. By the way the reply about a family forum was hilarious. It was good to laugh while dealing with his pain.