Mmmm, liking the looks (and weight) of that karma stem! Mind you were asking about my Avids last night?
Pair of SD-5 Arms (no noodle) = 133g
So factor in weight of noodle and pads and fixings.
Original all-in-one pads were 66g per pair, but KCNC cartridge holders (£15 per pair) and some Clarks pads were 32g, although I did have some filing to do to widen the slot for the cartridge bolt.