any size you can marry to the carb fuel intake. Can get some cool old world, brass shut-off valves at ace hardware. 1/4 or 3/16 will fit a chinagirl. 1/4 inch can be sloppy and need a small hose clamp. Just my humble opinion.
Cool part of any thing DIY. Your the designer and can splice in a garden hose if ya want one.
Cool part of any thing DIY. Your the designer and can splice in a garden hose if ya want one.