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The "controller" is within the BBS01B itself, not the display unit. You use the cable to connect to the BBS01 (motor) and the display is then disconnected. I had a few issues similar to what you describe with the pre-set weak settings. Using the software and cable, I experimented for a few...

And from the Bafang Configuration Tool, v2.2b - which seems (to me) to be correct.

I set 2, 4, 6 & 8 to 0% on both A and speed. 1, 3, 5, 7 & 9 set as normal. Tested in 9-mode. Changed to 5-mode and only level 5 worked. Then, set 1, 3, 5 & 7 to 0%, 2, 4, 6, 8 & 9 to normal, tested in 9-mode again, then into 5-mode and all worked. So, I am quite convinced that this is the...

Answering my own question, following some experimenting – for the DPC-14 / 850C used in 5-level mode, not 9-level mode – 1=2; 2=4; 3=6; 4=8 and of course 5=9. Yep, I was surprised!

Hi, I am a newbie to pedelecs, having just converted a Giant Roam using a Bafang BBS01B. My display is the 850C. So far, so good - but I have a question relating to the PAS settings in so far as I am preferring to have 5 levels in use, rather than 9m levels: The Bafang PDC-14 manual states...

I am in Surrey, not too far...... As a newbie with a Bafang BBS01B on a Giant Roam hybrid bike, I would be interested in more info as to exactly where (and how) you grease? Already knocking 150 miles and only fitted a week ago, so 1,200 miles will soon be achieved!