u/Lilac-Blossoms1

I found this circle looking clip when doing a valve adjustment on the exhaust side of my 2023 grom, it was in the valve cover when i took it off and still have no idea where its from, im doing a timing chain job soon and wondering if i need more to fix. My bike is sitting at around 8,000-8,500 km mileage.

Any help or theories appreciated!!