I bought a yamaha as a box of bits to restore. Ive been told its a dt 50 but im not sure the vin number is 3r1-000302 which makes me think its pre 81. If possible could somebody tell me what model this is and if it is actualy a yamaha.

I see it as 1980 YZ80G

Thats exactly what i needed to know. thankyou very much.