The forces are balanced when turning on a motorcycle, just like turning in an airplane. The phone’s gyroscope could notice the roll, but the accelerometer will

The forces are balanced when turning on a motorcycle, just like turning in an airplane. The phone’s gyroscope could notice the roll, but the accelerometer will just read slightly higher g forces in the “down” direction. That said, you can differentiate between car vs motorcycle. Cars don’t tilt so turning causes lateral acceleration.