Yes, I had the same issue and it appeared that this could happen either opening or closing, as it appears the ring gets distorted somehow, maybe with heat or use. I know that moving the screws on the rings should help with the alignment for closing or opening. Mine had a shiny spot but I never filed it, just addressed this with the screws.Hi cdnemsquy, thanks for the response.
Yes, 2007 1300 .
The above link address' the issue of the gas cap not opening. The issue I've had is not being able to close the cap after filling-up.
Upon inspection, I do see some 'shinny' spots on the leading edge of the cap. I will be sure to carry a 5mm hex until I remove the cap and file the 'shinny' spots down.
I've never touched the three allen head screws on the ring.
Interesting that my issue was closing up the tank as opposed to opening it up.