This is a new in the package Piston Rings set (1 set of rings for all 4  pistons!) for the 1980 1981 1982 1983 1984 1985 and 1986 GS750 and GSX 750 models.  This is also correct for the 1 year only 1985 GS700. This is a standard size (STD) ring set which is correct replacement for  67mm Standard bore pistons. These were used on the 16 Valve models. These will not fit your engine if it is the earlier 8 valve engine.  Correct replacement for #12140-31310, 12140-45410, 12140-31311.    Each of the 4 rings sets has the 2 compression rings and the lower 3pc oil control rings for the 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  racing these cool bikes. This is correct for these models 
Correct for :

1980 GSX750 ET and T  EX models LT LX
1981 GSX750 EX and X L LT LX
1982 GSX750 SZ EX T TZ
1983 GSX750 ESD and SD S Katana & TD
1984 GSX750 ESE and SE
1985 GSX750 ESF , EFF, EE
1986 GSX ESG

1980 1981 1982 1983 GS750E
1982 1983 GS750T
1983 GS750S

1985 GS700E

1985 GS700ES