Recently investigated a consistently fouled left cylinder plug to find that I had installed the oil ring backwards.
3k mi ago...
I reversed it ( Duane your website photos confirmed orientation,thank you) but constant rain has limited my riding of late to less than 100 mi. There was less fouling & oil on cylinder walls after the procedure.
But, after searching the web to no avail, is that ring now toast having been run for so long? Or does it need to seat in positioned properly?