I have recently taken a link out of my stock chain for my YZF 450 04 model. I could not get anymore adjustment out of it. Is this common practice, and should I get a few more rides out of it before I have to replace? I do 100% bush riding. Or am I cutting it fine and should I replace with an O-ring now. Im trying to watch the $$$ im spending. Was thinking of doing one more ride this weekend which will be 180k's. Thanks for any advice.