CJ wrote: They DO come kinda loose. It is a matter of tightening the nut on the underside. I haven't done mine yet. For test purposes, I taped over them with electrical tape but will tighten them later when I fill them with fuel.
I had to tighten mine up when I filled the tanks. Just be sure to loosen the bottom nut then turn the lower part of the cap in a little to tighten the rubber seal. I think I almost threw it away befotre I figured out that the bottom part of the cap is threaded! The nut is for safety purposes!
Dan
I already have a cap opener that I carry with me on my keychain. It's a "custom" opener that I got from Jack Holland. I'll post a pic of it at some point...