My thought too Quinten... actually, I think I've run into this type thing before. Maybe 10 years ago, a guy came back from India with a supposedly 60's model Enfield that was in amazing shape. Allegedly he was told by the Indian seller that it had been "re-done" and modernised, now this guy wanted to sell it to my neighbor. Real cheap. No paperwork, no answers as to how he got it back to California. Neighbor asked me questions, I know nada about Enfields, so I posted a couple pictures here and asked opinions... all responses said 100% modern, as I recall.
Notice this ad says "Road Legal", but no title status, and no US plate on it.
Enfield even has a manufacturers statement saying their domestic bikes won't pass foreign emissions, and buyers should purchase locally.