Welcome to the forum and congrats on the new, previously enjoyed scoot. Mine is an 03 with stock pipes, which means, if I had a noise coming from the engine, I'd probably hear it better than with a bike that has after market pipes on it. I honestly can't say I hear a noise on mine at all. Just a nice hum and thump while idling. As someone mentioned, the best thing to do would be to place it beside another 1500 Vulcan with the same type of exhaust, and listen to the difference side by side.