It is time to replace the chain rings, what gearing are you running. I am stock right now (14x51), I used to run 14X47 on my 03 450 but I cant remember where that was compared to stock. I think they changed the internal gears between those years. I am thinking of gearing up a tooth in the rear (going to a 50) so I am not between gears so much. What is every one else doing?