I use the hose/ tubing that comes with a pressure washer injector . It fits over an 11mm or 12 MM petcock hole and is impervious to chemicals. 5/16 fuel line is fine too as long as the hose has reinforcing mesh , it will work.
heat it so it will stretch on and clamp it with a hose clamp.
I have also used this instead of a petcock when in a pinch. Fit a 3/16 hose inside it and connect to the carburetor.
Electrolysis will work fine on your bike. get some non-galvanized rebar /redod and cover most of it except part of the tip with a section of garden hose so it will not ground out. You can bend it so it will slid all th way inside your tank.