SB, sorry I was working from an experience 2 years ago. My bars do have studs and they screwed in to the extensions which bolt from underneath. I can't be positive but I thought my studs were loose in the bars, not welded. I checked the site where I got the idea and the threads showed aftermarket bars and clamps. It only takes 5 minutes to remove the nuts and pull off the bars off to check. Cover the gas tank. I tend to think the stud isn't welded since it would probably change the properties of the Grade 8 studs. Wish I could remember but somethings I just don't commit to memory.
"OK, so I'm a tightwad. But, thanks to a tip I heard here, I got some risers on my 900 for under 20 bucks. I picked up 2 19mm deep sockets at Sears. They had two lengths, I got the shorter ones. (Please note that ACE hardware sockets have a too-narrow hole to pass the bolts through. I tried.) I then went to Home Depot and got two 3/8ths by 5'' grade 8 bolts. I also had to get lock washers and nuts. I had originally planned to get metric bolts and reuse the factory nuts, but they weren't long enough, and the heads were much too big to fit in the handlebar clamps. It took about 2 hours, including the shopping. I spent about $15 at Sears and $4 at Home Depot. The pictures are a little blurry, I think it's all that shiny chrome. But at least the riding position is a lot more comfortable."