The vin shows a 2000 model year machine
VIN: JYACB03W6YA009925 2000 Yamaha TTR90
year and model yamaha vin 510203147
year and model yamaha vin 510203147
It' a 1977
Jy43hpa05sa081604
2001
its in the vin
its in the vin
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.
It it's year 2000
2000
Double check that vin again, it seems to be invalid.