You might get lucky doing that, or, you might end up with the whole assembly, including the brazed mounting tube, in your hand. If you don't care about Momma's bike, do that. Otherwise, take it out and use a vise, to get the bend you need. The bigger the vise, the better. Years ago, I had a friend weld flanges onto a piece of 6" polished, drawn over mandrel, hydraulic ram tube we bought at the scrap yard. One end bolts to the floor of the shop, one ends bolts to the base of a Wilton 5" machinists vise. The Wiltons are keyed between the jaws, and you get a vise that the jaws don't wiggle on as you draw them together, and, I've used it as a small press, in a pinch. The ram tube was filled with recovered lead shot before we bolted the vise down, making the entire assembly "dead blow". If I need to bend a pipe around the vice, I can do it.
I've never regretted having a great vise in my shop, ever.