I know about these issues... been on this forum and reading since 2014 . But then again 'fixed' issue is a hearsay thing. I'd have have to dig through some old fb posts, im pretty sure ive seen posts on later Z's that still have these issues. Never found any articles or proove this has been fixed.don't skip read, you have to go deeper on some of the threads but then the questions & answers converge.
The Japanese guy who I purchased the bike from doesn't know anything mechanical but his Brother In Law worked at Kawasaki & informed him of the issue.
He purchased my 2016 bike, brand new, December 7th* 2017.
*same date Japanese attacked Pearl Harbour