For both the CGO600 and the CGO800S, the motors are of 250W power and 40Nm torque, and the bike has a top speed of 25 km/h.The motor only stops assisting at the max speed, but will not drag down the speed. You can feel free to reach higher speed with pure muscle power.Please kindly pardon us for not being able to change the speed limit settings, as it is configured through both hardware and software.