Just replaced my fuel filter at 15k miles. I didn't realize how dirty the old one was till I turned it upside-down and saw the brown fuel contaminates coming out of the inlet.
Fuel filters need more attention than people realise, a good idea to change on a regular basis, they can cause a whole heap of problems long term!!
Yeah I waited far too long to do this , it was the original 2008 factory fuel filter from when bought the bike.