I'm still wondering why there's no regulation on this, forcing manufacturers to hand-in both the user and service manuals. I own a Kawasaki motorbike and tried to get its service manual just to understand a bit more about it, and is impossible to get it at this point unless I pay Kawasaki 100€ for its printed version (a fucking ripoff). It doesn't cost them anything to release PDFs as a courtesy to its customers.
I have almost always had luck with searching the web for “Kawasaki vn800 service manual pdf”. The hardest manual to get was for my Harley but for $20 I was able to buy a scanned PDF from a site that’s almost certainly illegal but delivered exactly what I needed.
Yeah, I think for particular models it can be easy to find them. But for others no luck at all. My guess is that maybe after few years they can be found. In particular for the z650rs I wasn't able to get any good results.