Trying to refresh a Honda SOHC motor in an old TQ Midget. I need rings for 64mm bore, 1/16'", 1/16", 3/32" chrome with a one-piece oil ring. I'm not sure of the manufacturer of the pistons. They are forged and domed and it's a methanol-burner. It doesn't seem to be a common big-bore size these days. Any advice would be greatly appreciated.

Also, is anybody familiar with the history of this motor (CB750 SOHC Honda) in 3/4 midgets of the '70s And '80s?

Thanks, GMaul