KenR

Thanks again, I will try these but it will be a while.

Thank you, is there any chance that info 3 would show if the wiring has become damaged during folding and unfolding?

The display shows an info 3 error, Halls sensor error. When I work the throttle the wheel jumps forward and stops. Turning the pedals the motor seems to drive using pedal assist but I can't currently test this on the road as I am recovering from an operation. I have swapped the throttle with one I know works and the error persists. I have visually checked the wiring. The only fault I can see is that where the wires enter the controller through a rubber gasket at the end. The wires had pulled out a little so that about 5mm of the individual inner wires were showing. I pushed the wire back in and when the error persisted I gently moved the wire a little but still got info 3. Any advice on how to fix this would be appreciated. As I am not technically very skilled so advice on which parts should be replaced would also b very helpful. Thanks.

I have installed the following kit on my Brompton last year: Kit C SS:74 Silver motor with 16inch 349wheel Silver rim +KT T06SWF controlle+KT LCD4 display+thumb throttle+KT PAS+1-2 cable+9pins cable(100cm) https://www.aliexpress.com/item/1005002919596473.html?spm=a2g0o.order_list.order_list_main.5.49c71802BGxwub After a year of use with many folding and unfolding the display shows an info 3 error, Halls sensor error. When I work the throttle the wheel jumps forward and stops. Turning the pedals the motor seems to drive using pedal assist but I can't currently test this on the road as I am recovering from an operation. I have swapped the throttle with one I know works and the error persists. I have visually checked the wiring. The only fault I can see is that where the wires enter the controller through a rubber gasket at the end. The wires had pulled out a little so that about 5mm of the individual inner wires were showing. I pushed the wire back in and when the error persisted I gently moved the wire a little but still got info 3. Any advice on how to fix this would be appreciated. As I am not technically very skilled so advice on which parts should be replaced would also b very helpful. Thanks.

I have a very low step through Bernds Tandem with belt drive. I can mount a Bafang mid drive motor into a kiddie crank I attached to the frame above the front chain set. I can fit a 30 tooth 104BCD chainring to the Bafang and the chain set. The motor will drive downwards to the chainset and the cranks will not be attached to the Bafang. Has anyone tried this or anything similar? Do you think it will work? My main thought is that the "freewheel" in the Bafang motor will not be needed or work at all and the cut out when we stop pedalling will need adjusting via the computer program to stop immediately. But will this stop the motor when we stop pedalling straight away and is it safe? I do of course realise that I could use hub motors, change the whole drive system etc etc. But I have a Bafang motor and most of the bits so want to give it a try. AND the Bafang cannot be fitted to the existing bottom brackets for at least three valid reasons. Any help or suggestions much appreciated.

Thanks all that has all been a great help. Just had a look at the simulator. Unless someone says different it confirms what everyone has said above, ie that with my 6 Ligo battery units the output of a 250w motor is very similar to a 500w motor. Looks as if the power is restricted by the LIGO BMS. Looks as if there is nothing I can do to get more power if I want to take my bikes by air.

Thanks, My main battery is made up from six Grin Ligo units but I also have another which is six 36v 84wh skateboard batteries wired together in parallel. That way we can take our bikes by air.

Thanks, There is always a way but it would need really major work as it is both belt drive, low step through and folding. Even then I don't think a Bafang mid drive would fit in the bottom bracket shells......

Thanks, I currently have a 250w Bafang hub motor in the tandem and get a very similar experience to you. I live in a hilly area and want a bit more help on the hills. I prefer to be legal but with a touring tandem......

Thanks again Neith, how do I work out my battery rating?

Thanks for your reply. I would like the maximum power that I can get with 600wh 36v battery. This is mainly for hill climbing as the tandem is very heavy. I have fitted several kits on other family bikes but do not have much technical knowledge so any further help appreciated.

I would appreciate some advice on the best kit for my tandem. It has to be front hub as a mid drive can't be fitted and I want to keep the Rohloff gears. We have several ebikes in the family and all use 36v batteries so I am looking at 36v 500w set ups being the most powerful geared motors I can get for 36v. I looked at a Bafang kit on Aliexpress but as far as I can see from the Bafang web site their motors are only designed for 26inch wheels, i.e. they don't rev fast enough for 20inch wheels. CSC offer a kit with a 20inch wheel running at 360rpm which looks ok but is it strong enough for a heavy tandem. Any help appreciated.

[mention=12956]wheeliepete[/mention] Thanks so much for your suggestion, which I followed, and it is working fine now. For anyone else with a similar problem it did work when I first assembled it, see my first post, but it stopped working very soon afterwards. When I fixed the motor connections today I slightly ovalled the female side to tighten them so that hopefully they will not come loose again.

Help appreciated. On my Bafang BS01B I fitted a new controller. The old one had blown. I tested it on the bench and it worked. I disconnected the battery and plugged it in again but got a flash. After that the display a C961 still works but the motor does not drive. Walk assist does not work either but the display shows walk assist when the - button is pressed. I connected the motor to my computer and was able to read and write the controller settings. Thanks

Testing second hand kit on a working bike which had a damaged higo socket to the display.