Early head Oil Lines

I remember my 69 had the metal head feed oil lines on it, and when they started leaking (oh no, from vibration), I got a set of the plastic ones. They came with a rubber grommet on the long feed line and a sleeve on it like shrink tubing. Does anyone know what the grommet and the extra tubing were for, I never used them, they were just there. Now I am replacing with new Nylon 11 and wonder if there is any reason to put this stuff back on or just keep it clean.

Dave
69S

The sleeve was supposed to prevent the pipe from chafing where it passed through the cradle.

And the grommet fitted into a guide clip fixed to the headsteady:

Thanks,
That's interesting. I guess because I had the old metal lines, they didn't have the headsteady mount, and they also didn't go between the carbs, much less across the cradle, they just went straight down behind the timing cover and then looped back up to the banjo at the bottom of the timing cover below the oil pressure regulator. I just routed my plastic lines the same way and never even knew about the other routing. Learn something new every day.

Dave
69S