Ok I am setting up my first gas Engine, a Zenoah g38 and I have a question or two about the fuel line setup. I have 1/8” Tygon Tubing. My question is what size brass tubing should I use?

1/8”brass tubing seems a bit small should I use solder on 1/8” fuel line barbs or get larger brass tubing?

Is a felt fuel pickup clunk a good idea?

I have a Du-bro Gas tank stopper.