Hi everyone!
Finaly there is a 9 VIN decoder for all Yamaha 1960 to 2010!
You can find it here: https://impreso.no/yamaha/9vin/
I made it when i searched for info on my own DT125MX.
My Yamaha dealer said it was a 1978 model based on VIN, but it turned out it was a 1987!
Hope you can get use of it!