Re: Copper Gas Line??
yup, that's what i do. you want some flexibilty in it, so a short piece, like an inch or inch and a half at the carb and the tank will take care of it.
the loop people put in them isn't really necessary (but looks cool) if you use rubber ends. it's a "shock loop" and is designed for bikes with compression fittings that hook up to the carb and tank. same idea as brake lines on a car with loops or extra bends. it provides some flex, or in the case of a collision, the bends can stretch out so you still have brakes.
i use refrigeration lines, like for an ice maker on a fridge.