I have put several heavy coats of Permatex Spray Sealant Leak Repair on the overflow hoses of the inbound gas tank that are old and cracked. I assume this is why I would see a bit of gas leak out when I filled this tank to the tippy top at the gas pump. This is my best attempt, as I didn't see any other course of action without dropping the tank. As stated in the current eBay auction, the other (rear) tank will start leaking when it's filled about half way up with gas.