Here are the results of the re-weld job.
I had to do all of the above again because of a couple of flaws. It wasn't a surprise that I would have to do the lathe work two or maybe three times. Looks like twice was good.
In the pics below you will see that I re-welded the flaws, recut in the lathe, set the ring stop pin in place, welded the back side and grind out the excess, sand blast to look for more flaws. Also tried the piston in the cylinder and feeler gauged it. You will notice that since the pistons are tapered I got a .017" in at the rings and a .005" at the skirt. So when you measure pistons, it's at the skirt.
I am satisfied with the outcome of this project. At this point I think this is the end of this thread until I install it in the
Engine I am currently building. I will update this thread next year at riding season. The Engine with this piston will be installed in the death machine.
There are many reasons why I did this. One of them is that if this is successful it would prove that you never need to buy another piston again unless it is worn down out of spec. If you blow a hole in it or lose a rod end bearing and smash up the piston, you can just re-weld it. That's the theory anyway.
Currently getting ready to liquid cool that cylinder that CurtisR401 sent me and stripping a spare bottom end Engine I had on the shelf. Then building a liquid cooled head from scratch. All of this stuff will be bolted together and run next year. I will start new threads for this stuff and not contaminate this one.