It's pretty loud at the moment with no mufflers on it. Scared the little one when it first fired up. Surprised me the first primer kick too. I thought I had the key off, but it fired up and I quickly realized it was in the on position. For some dumb reason I haven't hooked the throttle cable up yet, so it was kinda touch and go getting it to idle at first. Sounds good, and both pipes were getting warm evenly. Unfortunately the spare gas can was close to empty, so I figure I can mess with it more tomorrow.