compression and burning oil(?)

I am still in the (long and arduous) process of tuning my bike for a road trip and happened to pull the cylinder 1 plug to notice that there is a ring of what appears to be oil around where it screws in to the engine. The insulator is black (I also know that it runs EXTREMELY rich on cylinder 1) but it had a slight shine on it, as if it was not just carbon.

I decided to check my compression. With the bike completely cool, dry test, I got these numbers:
Cylinder 1: 145
Cylinder 2: 150
Cylinder 3: 140
Cylinder 4: 150

These are all in spec, so now I'm wondering if the "teaspoon" of oil I put into the number 1 cylinder for winter storage is still somehow being burned up. I did ride the bike for over 1,000 miles during the rebuild and tuning process, so I would assume it would have all burned up.

What else needs to be checked? Is is possible that I am burning oil despite good compression?

Any other tips?

 

If your valve GUIDES (especially the intake guide) is worn, or the valve stem SEALS are worn, then it can and will suck oil into the combustion chamber.

The teaspoon of oil you put into it 1,000 miles ago is long gone.........

Do you get blue smoke out of the tailpipes, especially during de-celleration (may have to have someone follow you from behind to see it). Intake vacuum is at its highest when you are using the engine as a "brake", and that is when you are most likely to suck oil past worn guides or stem seals.

 

Chacal - had someone follow me yesterday and had no blue smoke, even during hard engine braking.

Will I be ruining the engine if I ride it like this? I read into it and the process of changing out the guides/rings/seals is quite an extensive and expensive one.

What stumps me is that my compression numbers are right on. Would it be worth it to redo the test with some oil in each cylinder to see if my numbers will increase?