Well this is a bit annoying.
No mayo under the valve covers. But tonight I decided to drain the oil. I wanted to see first how much was actually still in the pan, and second if there was a bunch of frothy mess in there.
First I drained the front plug, about 1 liter came out, so already off to a not great start. Pulled the rear plug and the mayo poured out. Some in globs.
All in all only about 1.3 liters of fluid was drained. Which means about 300ml disappeared in 1000kms. I’m less than thrilled. Bike really doesn't seem to be burning oil out the pipes, but it’s going somewhere. I’d admit the bike was cold when I drained the oil, but I don’t think that will make up the missing fluid.
So now I’ll be getting a new oil pan gasket, dropping the pan, cleaning it all out and starting again to see if it comes back. While my rides aren’t super long, (usually 30-45 min) I’m still surprised I’m running into this.