I've been hearing this embarrassing high-pitched screeching sound. I thought it was, maybe, a bearing in one of the cooling fans. It would continue for about 30 seconds after I turned off the engine. It was in the 90's today, here in Florida, and when I parked, I got down and tried to hear where the noise was coming from. I was down near the cooling fans, but no sound. As I was getting up, the noise got louder, and I realized it was coming from the area of the fuel tank! I opened the fuel cap, and there was a little pop, and the noise stopped. It's pressure from the fuel tank! I knew where the vent hose was on my Gold Wing, but I have no idea where the vent is on my F3t. Can anyone help, with some advice?