Purchased first 3 wheeler last week- year?

[Spak]

I am trying to figure out the exact year. I believe to be 80-84 model. Yamaha
The number on both engine and frame is 21V-02159.
Help if ya can and thank you.

[HoldMyBeer]

Found this older post. Hope the link works for you and helps

http://www.3wheelerworld.com/showthread.php/132415-Yamaha-serial-VIN-numbers