Where is the VIN located on a Yamaha Grizzly 600 ATV?

According to the parts man at Yamaha who I talked with today, the number is on the frame on the left side by the footpegs. This was for a Warrior 350, but may work for your model too.

For my Yamaha Moto-4 350 - the VIN is located on the frame, adjacent to the (rear side) of the left front tire.