Hey dude, them carb floats are pretty touchy things, a hair low and you won't get enough fuel. I messed with them a couple times, found that exactly 1.062" above the flange is that golden spot (right between enough fuel and to much where gas spills out of your carbs). Also, make sure all them holes in the float bowls and chamber are clear, not just the jets. Each hole has an exit somewheres else, and they do get gunked up, affecting how the bike runs. Spray carb cleaner into each hole till you see the stream shoot from somewhere.
I also took off the air boxes and hooked up uni filters unto the carb boots. Hence, I as well was concerned about the joints holding up the carbs on their own without being supported on the other end with the air boxes. I solved that dilemma by using a couple zip ties. I looped a zip tie around the top bracket of the carbs (the one that doubles as the throttle cable bracket), and attached that to another zip tie that loops around the frame immediately above that.
I got clubman bars on, but don't really notice that much of a difference in vibration from the other bars. It is bad enough though, that a bar end mirror became a useless, blurry mess. Anyways, you could buy weighted bar ends if vibration is pretty bad. You could also stuff sand into the bars and then plug them up (make sure the plugs are secure, else you're gonna leave a trail as you ride off, lolz).