Thought I would add a little background to the slogan. My son, my friend and I rode into the foothills a couple of weeks ago for a ride. We stopped at a cool little spot for breakfast outside under the trees. While sitting and talking, we could hear the rumble of Harleys coming down the road. Soon a large number of them pulled up to the restaurant. As they all turned their bikes off to park, my friend looked at my son and I and said, "If you can't make power, make noise." The design is not intended to be rude at anyone, we all love the bikes we ride for different reasons. My son thought he would like to capture the humorous moment through his design. Hence the slogan on the back.
Thanks for any continued suggestions or comments.