My four strokes aren't very loud and when I'm on a sidewalk and a cop looks at me I start pedalling and they immediately look away. Usually I don't even kill the motor. I'm street legal so I ignore the cops when I'm riding legal. I recently joined the Cyclone Coasters who ride vintage bikes every first Sunday of the month in Long beach. A little cafe reserves a whole curb for us to display our bikes before the ride. We go 10-15 miles on a ride through town and by the Queen Mary. Between those rides and sometimes to work, I get enough pedalling.