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Hi, what do you mean by calibration? Settings using the programming cable? Or some other method? Thanks

Hi, no error indication on the display. The bike has a throttle and works fine. I unplugged the gear sensor and gave it a short ride. It seemed to stop the fast twitching. I rode to work next day and thought all was solved. However on the way home, the bike was again losing power but...

Hi All I have a Bafang BBS02 which I have been running for over 12 months without any problems. On the last couple of trips out, I have noticed the pedals twitching or pulsing with loss and regaining of power. It is like 3 or 5 times a second so quite fast, but constant. It is more noticable...

Solved: I found the problem with gear change. The motor was very close to the frame and slightly loose. When in drive mode, the motor was trapping the gear cable between motor and frame. The chain wheel driving forward was causing an opposite reaction in the motor increasing the clamping effect...

Thanks for the response. As the shift sensor is in place with motor on test and motor off test, I am doubtful it is the cause of the problem. The spring could be though. With motor on I could imagine tension in the chain making it harder for the spring to have an effect. Are these...

Hi all. Just fitted a Bafang BBS02 mid drive to my 29er. With drive off, the bike goes down and up the gears without issue. However, when motor is on, the bike goes down the gears ok, but is sluggish to go up the gears. Sometimes the gear change just doesn’t happen. Click again and it will often...