I just bought an electric scooter from a local store.
It has 18 inch wheels, weighs about 200 lbs, has a 500w 38A controller, 500w wide angle motor and a 60v 20ah lithium battery that says 600watts on it.
It has great torque, but it can only reach 30 km/h. I need it to reach 40 km/h. I want to upgrade the controller, but I'm not sure what to get.
What controller will maintain its current torque, but increase its top speed?