Check your monoshock!!
They have a tendency to snap off, but because of the design layout, YOU WILL NOT NOTICE unless you inspect the bike, or if you ride over a pothole, whereupon the bike will drop down, go clunk and at best you'll be riding alarmingly low. At worse, you'll lock up the rear wheel and fishtail. Very nasty!
Seems around the 30,000+ mile mark, the monoshock gets a little brittle. Doesn't seem to matter how clean you keep it either, as this second Dragstar had a lot of lubing and maintenance after the first one's shock snapped. When it fails, it will snap off just between the swingarm bracket and the preload adjuster. The reason you won't notice while riding is that the base of the shock still fits up flush against the snapped end and performs normally. If you jack the back end high up, the wheel will remain resting on the ground and you'll see the shock wiggling around behind the rubber curtain.
I just had a second 650 fail MOT test due to it's fucking bastard snapped monoshock and I know several others this has happened to as well, all around the same mikelage (about 35k), so get home, check your bike and be mindful.
Any problems, I recommend getting a Hagon shock as a replacement.