The countershaft sprocket from Kawasaki goes on the the word “OUTSIDE” to the outside.
We can agree with that, correct?

Notice I cut away the rubber to show the it is an OPTICAL ILLUSION that makes one think the OUTSIDE is flat, it is not.

Notice the rear side, other than the machined ring, IS flat

Now, I lay the factory sprocket on the counter with the word OUTSIDE down, and the aftermarket sprocket with the spacer side down, the come out the same height:

This has caught many master Kawasaki techs over the years. DO NOT install an aftermarket sprocket backwards. The spacer goes to the outside….really.