Here is a set of black ones on my K6. I like em. I'd say buy these and I'll trade you cause the color doesn't matter to me but mine has the 6" rear. I love the look though.
On my postal scale the front wheel weighs 6lbs 15oz without rotors rear with cush drive 12lbs 7oz no sprocket or rotor. I don't have stock wheels to compare with.
if I had the money, I would totally be on these even though I ride a 07 ZX6R. I have wanted some lightweight wheels for some time now, but being a college student leaves me broke!