loss of power

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    Loss of power / sduro hardnine rc 2015 (Yamaha PW)

    Hello to everyone, I'm new here, this is my first post :) Anyway, I got a second-hand Haibike sduro hardnine RC 2015, (Yamaha PW) in a fair condition. I am new to ebikes, just have it for a month. Now, the motor was running just fine, but a couple of days ago, I have noticed a significant loss...