How do you take off a gas tank on 1982 Yamaha motorcycle?

judging by your question, i can see that you are a highly imformed individual and are familiar with the fact that in 1982, Yamaha only made one model of motorcycle. to remove the tank just find the bolt under the bar, then find the bolt under the other bar,its right next to a metal bar. youre going to need a wrench of course. one preferably made of metal.

if you are still unable to remove the gas tank, there are many people who are smarter than a piece of sponge cake who may be able to help you.