I know some of you might bite my head off for even suggesting such heresy, but does anyone actually follow the manufacturers recommendation and only change the filter every 6000 miles. I'm considering it as it is that way in the book, and after having this bike 4000 miles, I have a lot of faith in the Yamaha engineers. Now if I rode off road a lot, I wouldn't even consider it, but I typically baby the engine, I don't run it much at 70mph, I don't rev it all the way out very often, and I don't ride off road much. I've never even rode in mud. So my flame suits on. I know its only $12 but I am pretty cheap.