I've never heard of the 600 suffering from the problem some '01-'02 B12's had. If your 600 had this problem, you'd know because the oil consumption would be noticeable and the plugs would back it up.
Have you checked the airbox for an accumulation of oil? The engine "breathes" via a vent hose between the valve cover and airbox. It's not abnormal for oil mist to collect and settle in the airbox. That's why there's a capped drain hose out the bottom of the airbox. It should be opened up and drained periodically. Be sure to replace the cap when done so the engine would suck in unfiltered air off the roadway thru the hose. If you haven't drained the airbox in a while, you may need to clean out the bottom of the airbox manually.
My B12 will give off this smell sometimes, but then I know where it comes from... since I don't have an airbox anymore, my crankcase breathes via a little K&N filter, which will occasionally waft that hot oil smell.