We have changed many motors below warranty, plus they appear to be getting quieter and a lot more reliable each time. The bikes have not been with out faults, notably from the TCU and motors, but they've all been fixed promptly and less than guarantee. I've spent appreciable time with https://electric-bikes-for-sale19620.blogrenanda.com/32820278/getting-my-electric-bikes-for-sale-to-work