I did not need to add oil from 0 - 6000 miles of riding my 14. I removed my flies at 6000 miles. After that, I had to add oil, about 1/4 liter every thousand miles. I have always seen a blackish smear of oil residue on the air box drain tube bottle but I have no idea how much flows out of it because the bottle is not capped. I have no leaks from the engine but changing the oil tonight, I noticed a small amount of dirty oil right along the edge of the filter where it seats onto the motor. It probably leaked a bit since I have been making a point to not over-tighten the filter. I still don't think that was the reason i need to add oil. There was no stream of oil crud along the bottom of the oil pan, just a dirty ridge along the edge of the filter. Doesn't look like much got out there.
Strange thing, I just went on a 400 mile trip and the oil level had not gone down at all. I would have expected to see some drop in level since I'm adding every 1000 miles. I did a lot of riding at 100 mph on this trip and that is higher rpm than i usually do in my city riding. Maybe the oil consumption is due to less consistent running conditions of city riding.
So, how much oil do you need to add to your 14 and at what odo reading are you? Any "hows" or "whys" on oil consumption also much appreciated.