Originally Posted by supershaft
If they are like most all BMW tube saddle bag racks, welding them will not work because they are brazed. Gas, stick, MIG, TIG will make a mess of them. For some reason, nothing but sloppy crap welds can be had anywhere close to brazing. They need to be re-brazed. I braze gussets on them and use the back cross brace. They crack all the time without them.
I hadn't considered that they were brazed to begin with. I've seen one rack repaired with braze..........prolly why it worked well.
Yes, trying to metal weld near brazing will be difficult. And it will be extremely difficult to remove all the braze from around a tube end.