Here is a helpful find!  This is a new in the package Piston Ring set (1 set of rings for each piston) for the  1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968 and 1969 (according to Honda)  Honda 305 C77 CA77 Dream motorcycle.   This is a standard size (STD) ring set which is correct replacement for #13010-275-000, 130101-275-000, 13012-275-000, 13010-275-300.  This has the 2 compression rings and the lower  oil control ring for both pistons, everything to get your pistons/ engine running nicely again.   Get your old bike up and running again. We only sell the best! This is a top-quality aftermarket item shipped new in the package.  Good stuff if you are riding or restoring or AHRMA racing these cool bikes.  That is it!