Fuel in engine oil '03 Xb9r

[Pandemic]

Bike- '03 xb9r
Miles- 13k
No mods

My bike started off the season on point, and then performance started declining a couple of weeks ago.The idle has been a little wonky since I got it. It cycles between 950k and 1100k in a cyclical pattern. I heard a rattle in the primary, inspected, and found a lovely chocolate milk shake. I am assuming this is due to being forced to keep it outside during a couple nights of heavy rain. I drained it, thoroughly cleaned the primary, ect. and all good there.

I took it out for a test run, and it was still running sluggish and the exhaust sounded like it was choking on itself, valve train noise was louder than normal, and it was occasionally backfiring (predominantly when downshifting/engine breaking) so I pulled over to check the oil. It was so thin that it didn't cling to the dip stick at all and it smelled strongly of fuel. Picked up some oil, filter, and went home to change it. In the oil was this mucus like slime. Something one might cough up while suffering from a foul case of bronchitis. I'm the third owner, and it sat for 4 years before I bought it in April. I had a full fluid change done at a shop when I bought it and they reported sludge in the oil reservoir and flushed it twice. Perhaps they didn't get it all? Would sitting in a garage cause slime in the oil? I flushed it 2x more (once with sea foam) and ran a wire brush around the swing arm to get the boogers out.

As for the gasoline in the oil... I'm thinking that the fuel thinned out the oil which caused the louder top end noise. Isn't 13k miles too soon for valve/pushrod/rocker problems? Is the fuel in the oil a sign of running rich? I've got a buelltooth in the mail to take a look at the map and reset the TPS. I will be replacing the spark plugs as well. I believe this will be the first time that's been done.

I wanted to reach out to see if it sounds like I'm on the right track or missing something. What should I look for in EcmSpy apart from AFV and the TPS? I did the "flashing CEL" quickie diagnostic and did not throw any codes, it only verified that the ECM is working. This is my first Buell and I f'n love it. Want to get it back on track as soon as I can before our two weeks of summer is over
Also- will I damage the engine riding rich?