On my Rocker, I didn't need to remove the tank when I installed my braided cables. I was able to sneak them down after loosening the tank enough to lift it to clear a bit.
Nope. Gotta pull the tank. Its easy. If its EFI the fuel line is a quick coupler and you cut the clamps on the front balance line and the dash is one nut and a few elec conectors. Good time to fab up a tank lift too.
Or you can jsut slide the tank back by removing the front and rear bolts and unplugging the gas line. It sure is easier to get in there with the tank slid back.
Take the squeeze clamp off of the main pressure like and installa long line going into a coffee can or somthing and turn the key on and let the pump do the work.