How do you distinguish the size of an electric motor from where you can see it?.
Use a caliper meter to measure the current in the full power work of the electric motor car. Use this current, A times 48V, if it is between 750-850W, it means that the motor is 800W, and on the contrary, it is not.
First of all, make sure that your electric vehicle controller is matched, with unlimited speed and current limiting device. If the controller can not meet the power of 800W, then it is useless to change the motor only.
Machinery (Electric), commonly known as "motor"), refers to an electromagnetic device that converts or transfers electrical energy according to the law of electromagnetic induction. In a circuit, use the letter M (the old standard uses D). Its main function is to generate driving torque, as a power source for electrical appliances or various machines. The generator is represented by the letter G in the circuit. Its main function is to convert electric energy into mechanical energy.
