on most cruiser tanks there are 2 attach points to the frame, one at the front, near the forks, and one under the seat. Remove the seat unbolt the bolts holding it in place, and gently tilt the tank back until you can see the electrical line for the fuel gauge. Remove the gauge line. If fuel injected, remove the crimped clamp and the fuel line, inaddition to the overflow lines. If carbureated, switch the fuel valve to off and remove the line (going to the carbs) from below the valve. Gently lift off. Congrats, you are ready to reconnect your new tin.