Hello everyone. My name is Robert and I am new to this site as well as H-D's. Two weeks ago I purchased my first Harley, a '89 Electra Glide Classic and couldn't be happier. I was fortunate enough to find the one I did because it has a brand new engine with warranty and not to mention I wanted a big bagger to begin with. I am so new to Harleys even being around one close a idle I have never done, with the exception of being next to one a a light, that I have a burning question. Do they naturally have what I describe as a "knocking" sound to the engine?