I finally took my chirping rincon to my dealer and they were able to find and fix the problem. According to my dealer, the problem is a non beveled thrush washer. Apparently honda made two different types of washers and the non beveled ones make this noise. I didn't want to believe it at first, but having my rincon back and hearing it purr without the noise is enough for me. I am not sure where on or in the engine this washer is located, but they told me they had to get into the crank case to fix it. I am not a mechanic by any means, so I don't ask a lot of questions. I just thought I would pass this info along to the others out there with chirping rincons. If anyone wants to know details, I can contact my dealer and find out specifics for you.