Brainiacs needed!

I have a Yamaha 4-wheeler that I bought several years ago. We believe it was stolen and recovered and then sold by the insurance company. All of the seeable serial numbers are gone. Where can I find another number? I have no idea what year or model it is. Put your thinking caps on.

Engine block?

Or call a Yammie dealer and ask him where all the SN is stamped. Bound to be a hidden one somewhere.

Wannabe...

I just talked to the Yammie factory and they said there is 9 places on the motor where the number is stamped. Maybe the crook missed one.