I’m putting my subscription to work tonight. What is/was this?

 

 

That's my first guess is a old brake line being the new line is below I guess. 

It’s just forward of the fuel tank. I’ll get under there tomorrow and see where it goes. 

Yeah without knowing the end of the line where it goes but being it was in the frame clip I'm going to say it was the rear brake line but was replaced on the bottom because the line runs into the hollow of the frame just at the start of the fuel tank.