I didn't replace any parts either. I just disconnected the lines and the electrical adapter from the bottom of the fuel tank, and then MARKED and disconnected the two breather lines.
Then just remove the tank by disconnecting the front (obviously this would already be done) and removing the single pivot bolt in the rear just beneath the rider's seat.
Other than that, its just a matter of removing all the little bolts for the pump assembly, carefully sliding out the housing, and repeating everything in reverse.
It seems intimidating, but once you start taking parts off, it comes along very easily.