after a little more thinking about this, my thoughts........
I think that you are going to have more to fix than just replacing the oil lines.
Like grandpaul said, I don't believe that the top end was receiving any oil and that ain't a good thing, gotta fix that!
Maybe you need an oil pump, maybe the PO plugged up the top end oiling to mask a smoking problem (yeah, I've seen it done).
I would not be one bit surprised that when you do get oil pumping to the head, your bike is gonna smoke like smoldering leaf pile.
Then maybe it's head work... guides, seals possibly rocker spindles.
The thing that I keep seeing (or not seeing) in your pic is oil. If everything was working correctly and you rode it like you did,
I sure would have expected to see a whole lot more on the engine and on the ground under the bike.
