I've got papers for my R and the wife's TRX 200, and plan to go through the process of getting them for the X as soon as the DMV opens back up. I do 99% of my riding on private land but here in NY it's all we have as proof of ownership so it's worth it for the piece of mind.
Jason
85 ATC 250R - restored stock other than 18" rears, nerf bars, Honda key switch, 14T front sprocket, and white tank and plastics (except rad shrouds)
87 ATC 200X - restored stock other than 18" rears and nerf bars
84 TRX 200 - rough but complete budget restore for wife and eventually daughters to bum around on
Eton Viper 50cc - oldest daughter's current ride