well when i got the bike it had been setting for like 7or 8 years with the gas cap off so i just took the tank off of my old 77 lazer and fabed a bracket off the tip of my seat pan and just drilled some self taping screws threw the tabs of the tank into my old tank i also rapped ruber inertubes around the bracket and between the two tanks so no bzzzzzzrtt. but it would be badass to have two tanks