I just purchased a 2001 Harley-Davidson XL1200 Custom Sportster Cruiser. It has a Streched gas tank with 2 gas caps. One will open and the other is really tight, it will turn, but it doesn´t want to thread out and open. My question is ; Is the gas cap supposed to be this way, or does it supposed to open??? If anyone knows, would you please let me know? I would deeply appreciate it.