I don't know the weight of the stock wheels, but I can tell you a few things I did to lose some unsprung weight. The first was switch to a hollow rear axle off of an older CBR, a f3 or 900rr I think. Then I machined an aluminum bearing spacer and threw out the stock steel one in the rear. The front is already aluminum. Of course I also have a very light Titan Tough 520 sprocket from Sprocket Specialist. I would say I lost more than 2 lbs of unsprung weight on the rear. I would love to have some 5 spoke magnesium wheels though.
Motorusher formally known as DirtySanchez919.