To start, if I appear to be venting, then I probably am. Your patience is appreciated. FTI, I had the 400 series for almost ten years so I'll be comparing my last 400 (K9) to the 2016 650.
I did the initial fluid changes last night - what a royal pain in the <self-sensored>! It took me over there hours
to do this! The next time will be better, however, I need to find a better way to fill the transmission. The squeeze bottle method suggested by LeDude just isn't going to work for me.
Now, my list of pros and cons so far.
Let's start with the cons. Trunk, what trunk? Two helmets, what, size small? I can get mine in if I wiggle it enough. I typically hang it on the side with the cable Suzuki provided (actually a nice touch). The second con is the amount of tupperware that one has to remove to change the fluids. Oh yes, this snap stuff is a pain to get to reattach and the fear factor of breaking it while you're trying to remove it is rather high for me. The mileage isn't really a con because I expected that. However, it looks like there is a mileage error - in other words, if the meter says 40 mpg (example only), the pencil and paper mileage will be around 44+.
There is one more thing I don't like - there is no under-bike protection like there is on the 400s. I wish there was some type of plastic barrier like the 400, but with the exhaust system where it is, that's not possible.
Now, some pros. First, the seat is so much more comfortable that I haven't had the need to find a cushion. Second, the power is outstanding, especially in windy or hilly highways. Third, speaking of wind, even with the windscreen all the way down, this machine handles so much easier and feels more stable than my K9-400. Fourth, the fun factor - more than my old 400 and that had a LOT of fun factor. Fifth, I'm happy with what I bought, and for what these cost, that's a big factor.
Now, to all, ride safe 'cause outside of a few nutjobs out there, most are unintentionally out to get you.