The thread seems to have tended towards state and federal forrest rules. Original question asked if you can road register yz465? Yes, as far as I can tell you need Compliance plated 465 Frame. (I already had an IT 465, so I know how good they are on the street).
Mathching the IT and YZ pieces is the next piece. I don't know hlow podantic the RTA IS. but I thought the frame was the main difference between a complianced road bike and say a farm bike (refer to CR 500 examples).
Chalenge testers at local roads and govt. I mean it's not like you can get replacement frames for 465's
3 cents