Ummm, I run 22x11x8 10 paddle super lights on my bike.
Its stock motor with pro design head, 2 into 1 intake, 35mm pwk, 2 into 1 pipe, carbon tech reeds, +6" swingarm, 13/45 gearing and ebc clutch springs.
So, no he wont be over paddling his bike. Since the super lights on 8" rims dont way a whole lot, they actually do quite well on bikes with just decent bolt-ons.
If thats your bike up in your signature, and those side pipes are actually letting a ported motor breath, then you need some more paddles too.