Smoke isn't a good sign! I thought over filling would result in more oil being spat out into the airbox?
Mine often smells like an oily rag after a good day out when I'm parked but the smell doesn't linger when it cools off.
I'd get it looked at
We've got 32c daily here now and mine feels real hot and runs just under the top bar in traffic but lowers a few bars after a kilometer of free ride...
Good luck,be interesting to see what you find.