[BruceWilkie]

I used to run mine outside frame until well forward of flywheel (come up just behind A-arms clear of anything moving) then up to regulator. Mount regulator to fender or fender well away from heat/moving parts. Try to run line(s) to carb in a way that fuel (from a loose connection etc) cant drip on header or a broken belt cant snatch or damage it.

I have run fuel line in engine bay under upper control arm brackets after coming up and over top of frame from outside. Also kept it outside of frame until just forward of control arm, then over top of frame. Just be sure control arm cant interfere with line.