My wife is packing a bag to put on the tour pack luggage rack and it feels like it weighs a ton...any foreseeable problems. I have all our riding gear down low in the saddlebags...chaps, rain gear, jackets, tools.
I remember seeing a sticker on my 14 limited luggage rack saying 10 lbs. was the limit ON the rack which is not very much but I may have read it wrong.
Put one of those small suit case like bags with the wheels, and handle, and a duffel bag on top of that, went about 300 miles one way in the rain, stayed a few, and came back in the dry, and all was good, two up, like stated above , just be aware of the weight when in tight places,