I'm thinking about restoring my dad's 1980 Harley Sportster. Not only will it be my first project but if all goes well it will also be my first bike. What I know needs to happen is bottom line, the gas tank needs cleaned out and then put back on the bike, the battery needs changed, the seat needs put back on it, and for now, the tires can probably be aired back up until I can find new ones. But like I said this is my first project. Any advice on the cleaning of the gas tank and what battery to replace it with would be greatly appreciated. I'm only 15 years old, but again, any advice would be greatly appreciated.