Why do they have recommendations? That’s easy. Lawyers and accountants. Kawasaki’s (and every other vehicle manufacturer), main objective is to make sure that the bike makes it out of warranty with as few claims as possible. Easy does it, does it.
If you ask the engineers, (me being one), They’ll tell you for best performance, you have one chance to seat the rings, it occurs in the first 50 miles.
I’ve been using the motoman procedure for 20 years? Cars and bikes, and never had a problem.
Aprilia
C14
BMW M3
C7 Corvette...