The car line up, the pedal also rotates, the speed is loose, pedal power automatically will drive the car go, it is not safe. How can a pedal device not rotate?
If the shaft assembly is too flexible, it is prone to the above situation, the current solution only by adjusting the tightness of the axle assembly, a central shaft assembly slightly tight, increase resistance, also can consider to cancel the booster, you can go to the store, at the same time the company will try to improve your questions.
Through this cycle will cause you describe the phenomenon. This situation is also a common problem in the electric vehicle industry (at present, all brands with power assisted models have this problem)
Your problem is described by the crank (pedal) with the switch, because the rotation of the motor drives the central shaft to rotate the crank flywheel, booster is installed in the axial position, as long as the axis of rotation, and the booster will begin working on regulation of motor rotation
