I am recovering from a double hernia operation and am doing maintenance on my 2014 FJR. 21,000 mi. Thanks to T.W O. for his vids. I replaced the battery yesterday and today was the air filter. The air filter was amazingly clean after 21,000 except for for obvious seeds deposited by a rodent somewhere in time. No excrement. My bike was one of a lot of left over FJRs purchased by a Yamaha dealer in Oregon and blown out the door for $13,800. In or out of crate. Your choice. My garage where I keep my bikes is lined with mouse traps as I dont like them in the wiring or air cleaners of my cars and bikes. I have never in 55 years seen this in any of my bikes. It is possible of course since this bike is used for touring/camping that I picked up the seeds in some place like Utah, for instance....Just curious if anyone else has found this in their FJR air cleaner without any nesting material or excrement????