'72 oil on outer spark plugs

[Ratt72cb]

     hey, brand new to this forum. i have a '72 cb750k2. the bike has around 27K miles on it. the problem im having now is that my outer spark plugs (1&4) have oil on them. the oil in only on the the part of the plugs that is inside the cylinder head. it started with only the #4 doing it. but now #1 is doing it also. when i put new plugs in it, it runs awesome. but that lasts for about a week before the plug electrodes are burnt black from the oil. and it loses power from what im guessing is not getting enough spark. im gunna go ahead and guess that i need new rings. but i wanted to make sure. any help would be great. thanks!

[Ratt72cb]

it really doesnt smoke that much either. just a little white when it starts, but not blue or anything.

[Re-run]

Well white smoke on startup means it is burning off moisture. As for the plugs, the first thing you might want to do is a compression test. See if the compression is really low. If it is over 110, then it might be ok.
But if it is lower, then what you do is take a bit of oil, a teaspoon or so and pour it into the cylinder. Test for compression again. If it goes up, then you are looking at a ring job minimum. If it does not go up, then you most likely need a valve job.