Anyone know where to look for the Vin number on a ealy 80s yt175 trimoto. Not sure of the year either. Did yamaha stamp the manufacture date anywhere on the frame? Thanks.

 

Ive also got a tri moto 175 and I could not find any printed in the frame.
I did find a sticker with the VIN no on the frame near where the back light would bolt on, I canna mind exactly where it was as when I got the bike it was a state and i now have the sticker with rusted paint still attached all framed on a bit of card so it doesnt get lost.