Hello all...just purchased a 2009 Vulcan 900 with 9000 miles. I didn't notice this on the test drive but when starting the bike after it's warmed up it makes some clacking noises for a minute or two and then quiets down again. There is no loss of power or any other issues but this noise has me a little concerned. Again, it only happens at hot startup and goes away pretty quickly. At cold startup, it's completely smooth and silent.