Last spring upon my routine inspection and replacements I discovered the infamous crack in the exhaust bridge of my YZ 125. This particular crack ran across the top of the bridge and followed through up between the valves. After a few calls and some research on pricing a new cylinder I went with a company that said they can weld the crack and re-plate the cylinder (other places just wanted to install a liner) with a high success rate and a 1 year warranty. When I received this back I quickly noticed that they only put a small bead on each end of the crack. I could have done that myself, minus the plating. I guess I was under the impression that they had some way of TIG welding the entire crack. My question is, can anybody weld the entire crack in such a tight place? My TIG at work has a fairly large head on it and there's no way I could have welded inside the exhaust port. There's always the " pre-heat, spray and pray" method with the MIG welder, but that more than likely would have resulted in a ruined cylinder. I'm not up on the advances in welding technology, I guess I just assumed they had some sort of magical, tiny TIG that allowed welding in tight places. What are the odds of this bridge cracking again? I only managed to get about 10 hours on this bike last summer. I will be opening up the top end again when the bike comes out of storage and before the warranty expires.