In Australia the motor cuts out at 25 km/h. This is too slow. The motor cuts in and out frequently and the bike feels "off". So I paid a guy to halve the speed

In Australia the motor cuts out at 25 km/h. This is too slow. The motor cuts in and out frequently and the bike feels "off". So I paid a guy to halve the speed that is reported to the controller. This is the best way to modify the bike, as it can be easily reversed. No hardware change needed, and no trace of tampering. I couldn't do it myself. A guy with special bluetooth device and software connected to my bike made the change. Bike is now good. Motor no longer cuts out at 25 km/h. I almost never ride above 35 km/h anyway, and often use the lowest power setting. If they had made the limit 32 km/h, I probably would never have bothered hacking the firmware.