+1 on loosening the chain. It came from the dealer with absolutely no slack. I loosened it and then while on the bike I took a yardstick with a nail in it to check slack. Once it felt good, I locked in. Chain 10,500 miles later looks great.
Additionally, once I got to 4,000 miles or so the engine seemed to really smooth out and run even better.
The windscreen ... well it is simply bad. I am looking at replacements now.