That air filter looks pretty bad. I would almost bet it got missed. Is the center oily ? Is the oil level correct? Too high a level can do this. One reason to look into servicing your bikes yourself.
Oil level is good. I changed the oil myself the last time two times since my warranty ran out and the oil was one of the first things I checked when the problem began. I was looking to see if the oil level had raised and antifreeze level had lowered. I have a feeling the filter is the original so it has 60K of debris.