The item that I am selling is a great find. This is a new in the package ring set  (complete set of rings for both (2) pistons...so enough for 1 engine) for the  1973 & 1974  TX500 model motorcycles as well as the XS500 from 1975 If you are looking to replace your rings on your stock original size Yamaha piston, then this is the correct part for you. This is a standard 73mm size (STD) ring set.  This has the 2 top compression rings and the lower 3pc oil control ring, everything to get your piston compression back where it should be.  Correct replacement part for Yamaha part # 371-11610-03-00.  A great deal! Get your old bike up and running again. We only sell the best!  Top-quality aftermarket item.