LOL, well if I was out in my driveway running my Harley for two hours a day, you'd eventually get sick of it too.
Noise pollution *****.
And if someone wants to run a 60,000cc Cummins diesel mower once a week, then that's fine. Just not every day in my ******* face.
Most Harleys I've heard aren't comparable to a little old lawn mower. They're much, much louder, and running an air cooled bike in your driveway for two hours doesn't seem like a good way to spend your money, but I wouldn't mind. I'd probably drown you out with my music if I got sick of hearing it, but that "potato potato potato" sound of an idling Harley is music to my ears.
If you're going to live near people, where grass grows, your life would just be a lot easier if you could accept the sound of mowers in the summer.
Cordless electric mowers used to not be self-propelled, but EGO has one that is now. Not sure if the motor is brushless or not, but you could buy him that, with batteries, for like $800 but you can't make him use it if he doesn't want to. If he's mowing every day, an electric mower like that would handle it just fine, and probably wouldn't even deplete one battery.
If I was your neighbor, would you let me bolt on some stock pipes to your Harley, to quiet it down, if I paid for them?