1978 dt4
1999
That would be a 1978
All you need is to know is the Vin #'s on the quad.
year and model yamaha vin 510203147
year and model yamaha vin 510203147
It' a 1977
The vin shows a 2000 model year machine
Enter the VIN into a website that offers a VIN Decoder and it will be able to decode the information on the VIN for you.
2001
Jy43hpa05sa081604
its in the vin
its in the vin