Well, this YS53 is no more. It went to YS engine heaven. All I can figure out is it must have ingested something and no it wasn't the hunk of JB Weld. That repair looked as good as the day I did it. The back plate and rotary valve are scored as well as the piston, ring and cylinder. The inside of the crankcase had aluminum bits all over.

I did some looking around and found a nice first version 63 (regulator on the bottom of the crankcase) to fill the old engine mount. Looks to be almost new. Should be here this week later on if all goes to plan. More power is always better!

Ken