29mm smoothbore pilot size 17.5 20 25 ???

Have 78 kz1000
They say there are 3 pilot sizes for the kz1000
When using the 29s. The last pilot size is 25 then it says for the later version?
If they are referring to the 29s how can I tell the difference between the 29 carbs
Or are they referring to later kz like the j or gpz?

Use the 17.5 pilots you won't need any larger unless you have a seriously modded engine.