Have found the problem, Well it's nota problem. After doing some more checking on line I found 3 others that had the same noise when cold on start up and one of them noticed it went away when the weather picked up, and only started when the weather went very cold so it looked like it was the cold. Anyway I put the bike in my kitchen for 24hours where it was nice and worm. Started the bike the next day and the 20 second noise on start up had gone. So it looks like it's the cold weather that does it. Something to do with the metal shrinking more then some of the other parts when really cold. My garage is not heated so when it's -2 outside my garage is -2 . Started the bike on the second day and started with no noise and sounded perfect.