You have to loosen the clamp at the bottom of the bars and slide/unscrew the bars off the fork then put new bars on (if you have them). If you don't have new bars I'm sure you could easily track down some new stock bars because most people get rid of them these days or you can buy after market bars that do not have the height adjustment clamp so you won't have to worry. It is not a good idea to weld aluminum bars in the middle of the steering column... I can say this from experience. Even if the weld is good it just makes it too weak. If you get new stock bars you can take the adjustment clamp off, drill a hole through the bars where the clamp was and put an old front axle or bolt through it and that will be plenty strong enough for you and the bolt won't stick out as much as the clamp.