I recently had to replace the left hand side headlight, but in the process, I found a loose part. It appears to be for the fuel system, but I haven't been able to find where it is supposed to be installed. It's a rubber fitting, about 1 inch tall, and has a 90 degree bend leading to a 2 inch one way valve which is beveled at a 45 degree angle. it has a small filter inside. I have poured through the online documentation, and searched every parts diagram available, but I just can't figure it out. I can send pics if needed.