I had troubled myself over this part, and wondered about fitting a 36 year old rubber part to my bike? but I need not have worried, the pipe has been sat on a shelf, and is still supple, and has no signs of age or perishing. So I see no reason not to fit it, I wonder how you guys feel on this?
Yes, I know you can buy new top hoses, but they don't have the wire surround on the ones I have seen.

It even comes with the boot fitted....

