Did some rack braze-ons last weekend. It was a little tough because I used MAPP gas and it took a awhile to get to brazing temperature. There was a sweet spot temperature that was hard to get to without burning off too much of the flux. The biggest solution came when I was taking flux from other parts of the assembly and moving it into the area I was working on. I practiced a bunch on a piece of scrap chrome-Molly and felt comfortable enough trying it on the bike.
Getting the parts hot enough for the silver to flow when I had the parts clamped together was a challenge. Once I put a tack weld of silver solder on and could remove the clamp the silver flowed OK. I don't think I will win any awards for the looks of my brazing but the mounts are on very solid.
