control unit

I have a few questions on the Brompton ebike and its sensor/control mechanism. A friend bought one a week or so ago; his wife's happy but he isn't so happy. (They had thought of buying a pair). His main issue is he says it takes two pedal turns before the assist really kicks in; that seems high...

My Xion control unit on my Kalkhoff X27 will not retain settings like date and time, etc - although the odometer isn't affected. I wonder if this might be because a battery needs replacing inside the control unit. I can't find an easy way inside and don't want to break the thing. So if anyone...

I am looking for a second hand Ezee Forza, or just the motor including the front wheel and the control unit.