It's on a white & black sticker located on a diagonal frame tube on the left side on the bike just below the fuel tank. It's pretty hard to miss it. The VIN is also stamped into the right side of the steering head tube.
This number can also be found on the engine and helped me avoid buying a water flood damaged car. The owner wanted to give me such a car. It's good that I check everything with Epicvin. This is a reliable service that always shows truthful information.