[MotoX16]

I'll post a quick update, not sure how much it will help though. I never definitively found the problem. The dealer replacing the rear struts did not help. Unfortunately I did a couple mods on the same day, way back when, and haven't heard any noises since. I'm thinking it was either the rce yellow springs that fixed it, or the whiteline subframe bushings. The rear end felt a lot more solid after those and no more clunks.

Very possibly could have been something else. Having the rear suspension components loosen and the reseated/torqued might have been all it needed. Or maybe it just went away with time. Hard to tell for sure

Hope that can maybe help someone else