Yep, he was a good dude.
Another thing to think about with this method. Bike is sitting in the garage. While sitting, all contaminents settle to the bottom. Someone sucks up the top 80% (and that is very doubtful) of fluid, it's simply removing the BEST fluid, and replacing it with some slightly better. All crap is still at the bottom. Every fluid change I've ever done doesn't get rid of the junk until the last ounce or so, which tells me this does nothing but let crap accumulate over the years.
Not to mention taking out spring and changing/inspecting seals is a good time to look at all the internal parts.
2010 690 EnduroR
2013 500 Exc