I think so too. Some of the caps I found said they worked on 1983 and up Harley sportsters as well as the triumphs. That would definitely open up some options. I am really intrigued to make a kit to make the monza lid a real sealed cap to remove and replace the factory one.
I know there's a cap hiding on their shelves that would work. My only concern was digging for one without the giant raised finger bar across the middle, for lid clearance concerns. Also i grabbed the cap off my truck and it grabbed the threads, but it was too large in diameter and caught the lid base ring.
6 mm thread-to-thread (red), 25mm from bottom of seal to bottom of threaded section (orange), 4 mm from bottom of cap to bottom of seal (green), approx. 44mm O.D. for threaded section (blue).
So much detail! I can even see it has a double lip split oring seal. You're awesome for this Einar, thanks!
