Would love to have that thing. My first bike was a yz 125. A few years earlier i had a 3 honda 70 3wheeler. The yz was used. Got it for like 100. Little bike took off without me the first time I popped the clutch. My parents bought me the Honda new in the early 80s. Never had a Honda 2 stroke. I don't think, not sure if the 3 Wheeler was or not.
If your Honda was an ATC 70, definitely 4 stroke. I have one of them that needs a rebuild/restore. Super desirable little bike.