How to take the top speed out of a super73?

It is important to note that modifying any eBike, including a Super73, can be dangerous and may void your warranty. That being said, to increase the top speed of a Super73, you could consider upgrading the motor or battery to provide more power, using a larger front sprocket, or adjusting the pedal assist levels. It is recommended that you consult with a professional and refer to the manufacturer's guidelines before making any modifications to your eBike.