I only change it once every three years or 12,000 miles, whichever happens first. Too expensive otherwise. As for the cct fapping, well, whatever it does in there in the privacy of its engine case is okay with me. j/k I don't let the oil go much over 3k. Don't know if the cct is tapping or not - not even sure what to listen for. Not too experienced in that area. Seems to run okay plus wearing earplugs most of the time when riding.