The other day I noticed that my upper chain roller had disappeared along with the mount. Now I'm stuck with a hole in my GYT-R titanium subframe. I finally found a welder and a source for the metal but I've been told that I need to match the titanium alloy that the subframe is made from or else I'm gonna be headed for trouble. The dealer is a waste of time. They wanna sell me a new one. I called Yamaha's 800 customer service number and the gal told me the thing was made by an outfit called Titanium Sports Tech. After doing a search for them on Google I've come up empty. Does anybody know? Is it Ti-3AI-2.5V perhaps?