What are the correct piston rings for a 1978 KZ400B 13008-5006 or 13008-5019?

I ordered a set of piston rings for my 1978 KZ400B. The parts number of the rings I ordered was 13008-5019. What I revived was a set of 13008-5006 rings. They look to be the same size but I'm unsure. I wanted to ask you before using or returning them. This is the first engine I've rebuilt so I lack the experience and knowledge to make the call myself.

Partzilla list the 5006 number, CMNSL list the 5019 number, the below Ebay add suggests they are a supersession ??

 

Not sure. The only difference I can see is that they changed the oil rings between them. The 5019 is a 3-piece oil ring set and the 5006 is just one solid ring.

I attached images of them here.

I suspect the 5019 superseded the 5006 because of oil consumption problems maybe ??

One piece oil control rings are pretty bad.  I wouldn't run one unless there was no better option.

Our Kawasaki parts price book, dated 09/05/1994, shows #13008-5006 is superseded by #13008--5019.  There may  be a service bulletin that denotes the reason for the change.  Also, Mama Kaw often changed part #'s simply due to changing vendors.

Good Ridin'
slmjim & Z1BEBE