I know things... A lot of things.
Join Date: Feb 2015
Motorcycle: GSXR 750 K4
Re: How do I fix this (gas cap) pictures!
While I understand your annoyance, I find accumulation of water and rust in the fuel, to be a source of much bigger and likely more long-winded annoyance. I therefore would not swap it over mere aesthetics, if it currently works, certainly not with a cheap aftermarket part.
The key is certainly aftermarket, and perhaps the cap is too. It's hard to see from the pics, but the gasket seems to have receded for some reason, leaving traces of rubber behind. That would explain the cap sticking out, but I don't know why it would happen. Perhaps disassembly and inspection would reveal something.