Guys;

Not to worry! That's the vapor vent, and as the official blow-up diagram (no pun intended!) shows, it's supposed to be there. It gives the vapors above the fuel in the tank someplace to go instead of pressurizing the tank and possibly pushing fuel back out the fuel filler. By venting the top of tank into fuel filler, this is prevented.

Joe; Just make sure the clamps are snug...that should prevent leaks and puddles.

John; Thanks for posting pic.

Cheers

Looks like original equipment. I'm going to give mine a very critical look when I get home. I have to be very careful on mine if I fill up the tank and subsequently park it either nose or right side high on a hot day. If I do gas oozes out the cap and eats away at whatever type of paint is on the car. I have a large dull area that wax doesn't help and a few bubbles peeled down to the primer from that.

Image courtesy of www.gcp.se and their excellent online parts microfiche.