Well now I feel stupid, you are correct. I got my manual out and looking at the notes section on the scheduled maintenance it does say every two years. I should have been doing it more often. My buddy has a BMW and he said it is very important to do on his bike. Next time I'm in to the dealer I better apologize to the service manager. I told him my manual didn't say to do it. Like I said before my bike never has had any problems, runs great, would never buy anthing but a Harley