....the oil is not leaking, you are burning it.
the first thing that comes to mind is he big bore kit.
it is a known fact HD cylinders must be installed within a week or two at the most after being bored and having the toque plates removed or they will go out of round.
I have yet to find a set of cylinders from HD that are round right out of the box.
if the installer didn't verify the bore dimensions and hone out any out of round, the bike will run fine and continue to use oil for the life of the engine..
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