I seen that same style on a GSXR1000 last time I was up in Tucson, look very nice. I asked the sales guy about them, and they claimed they are only slightly lighter overall than stock, but as with many wheels, the majority of the weight it centered closely around the hub. That keeps the gyroscopic effect to a minimum. Definately post pics once they arrive and you get them on. I'd like to see them on a Busa.