Just keep it quiet until it is registered. Then randomly start it up and rev the shit out of it every morning for a week, the minute the noise ordinance stops. (8:00?) If she confronts you, remind her you are within the law. She’ll love that. Or put it in the garage, open the door, rev it, stop, close door, and leave. Daily. I hate neighbors who insist on trying to make people’s lives as miserable as theirs.