Weight limit? Hahaha, yeah we go way beyond that any time we travel..
We've put on a little bit of weight since we last went anywhere, back then I was at 175 and she was at 95. Our gear, armored pants, boots, armored jackets, helmets etc easily weigh 20lbs for mine 15 for hers.
One saddlebag has cooking gear, coleman lantern/stove, camp fuel, food and supplies for an extended time on the road and a 3 man tent on top. Other has thermarest pads, sleeping bags and rest of the camp supplies. Tour pack has 2 duffle bags for mine and her clothes etc, and top roll bag for light weight stuff we need easy access to. Laptop, DC/AC inverter that runs off the bike for charging everything (we were without electricity for 12 days at one point) camera gear bag behind the windshield. Anyway, probably 75-80 pounds on both sides and 60 on the back.
One casualty of all the weight on the back, my nice heavy duty nicely chromed rack bent severely where the side supports ended and had to rig up something sturdier on the way:
We also bought tons of souvenirs along the way and had to keep shipping them home in the flat rate boxes from the PO when we ran out of room.
We probably stayed around 500lbs on the bike.
I would not recommend it on a stock bike, it would feel pretty sluggish and may get you into trouble if you needed to accelerate to get out of a situation. This bike has had quite a few mods and a lot of dyno tuning to work out jetting due to my living at very high altitude. If you haven't upgraded the clutch springs you'd likely feel slippage whenever nailing the throttle like we did on previous trips before fixing that and replacing clutch disks.
If the bike is tuned good with aftermarket or gutted pipes and new air intake to open it up you'll barely notice the extra weight, although if you have too much on the very back the steering gets very light and a touch squirrely. With the suspension set on the highest we almost never bottomed out, just on some pretty bad washboards on dirt that we were also hitting the frame on and a couple of other questionable places we probably shouldn't have taken a heavily loaded down cruiser
A lot more pics of that particular trip here http://ziariderblog.com/category/trips/2010-trip/