i have an old moped that gets to go slightly faster than ones registered today
issue is that has a stinky two-stroke and I legally can't change it to something else, and the gas tank which is inside of the frame is going to rust a hole in a year or two
i am not looking forward to having to redo the registration so i can put an electric motor on it
my only option to keep it in stock condition (which I should because it's over 40 years old) is to basically make a new gas tank inside the existing one, without removing it
I would basically need to get a flexible tube of some material which can handle gas, put it through the inlet and outlet of the tank, and then blow hot air through it until it's reached a reformable state where it will retain its structure once cooled - then squeeze the tail end shut to make it take the shape of the tank