Morning fellow Road Warriors. I've been having some issues with my 650R (EU ER6F 2007) and vibrations that are getting worse with every ride. About 4000 miles ago I went from Total 10W40 to Mobil Extra 4T 10W40 oil and some have suggested that THAT might be the cause of the issue, and I'm right at my next oil change/service interval right now and don't want to make the same mistake again. The Kawasaki importer (and some other EU importers) are recommending switching to 15W50 oil since last year.. specifically Motul 5100, but some are pushing Shell. I've notice that my gear changes got rough and sometimes take a bit more effort then before, and there's a lot more clunking when shifting while it was smooth as butter before. Again, can this be oil related? In the last 1000 miles I've noticed that the fairing is buzzing a lot more, my right hand gets numb, even my a$$, sometimes even my right leg. I'm about ready to park the bike in a brick wall.. as I've got some surging issues too for thousands of miles too etc.. Anyone got any ideas?