Lvbu ebike assist system is a special system different from any other systems. The slope of the road is a critical factor of how the system calculates the power that you need. The assist power is highly depending on the slope. The Gyroscope can measure the slope of the road, but it needs a datum of 0-degree ground. We need to calibrate the Gyro angle to be 0 on a level ground as per the instructions in calibration page on the APP. So that the gyroscope can tell how many degrees you are uphill or downhill and ask the system to provide proper assist power or shut down the motor. If you don’t calibrate the Gyroscope, you may get wrong assist or no assist from the motor.