Thanks to everyone for the replies. We are not sure exactly how many miles it has been driven on this tank. We bought this bike from a guy who was selling it for his brother in law who was having some health issues. The guy we bought it from was on a trip when we went to pick it up, and his wife didn't seem to know much about bikes. So, we have been figuring things out on our own, like where the key goes, lol

We figured that one out after a few minutes. But after that and then the "where is the gas gauge" question we weren't feeling too intelligent

Thanks again for the help!
Dinah