Carrera Vengeance Mk1 Bafang Hub

[Preload]

Hi folks, looking for some advice and help here please.

Currently I have the Carrera Vengeance, with Bafang hub (BFSWX02 36V250W (12) 27.5-1808147073-1 )
With the original mini controller and LED 790 display.

Can I just use a KT type controller and LCD display with this motor?
Advice on type to look for much appreciated (wattage etc)

I took a few pics of the connectors and also the inside of the controller.
Amazingly even after removing the gelatinous compound to reveal the PCB, the controller still works

 

[Nealh]

A pic of the motor cable connector along the chain stay as well.

 

[Preload]

9 pin Bafang Julet type.

 

[Nealh]

In that case one can use any compatible controller/display combo, Kt will be perfect just ensure the battery can deliver more then the required max current of the controller.

 

[Sturmey]

Hi. I think this situation has similarities to the Pendleton upgrade. I think if you change the display and controller to for example the kt version, you may also need to change the 3 in 1 signal cable for a 4 in 1 to (as well as possibly brake levers) as I think the '790' has a different pinout and the Kt also has an option for the throttle.
Anyhow, below is link to discussion on same.

Pendleton Somerby Upgrade

Hi, My wife has a Pendleton Somerby E Bike, fitted with a Bafang Rear Hub RM 201.D 250w Motor, a 36V 8.7ah Battery and a King Meter 790 display. (brake cut offs also fitted) She has a big problem with pas delay when starting to climb a hill after descending. The power simply doesn't seem to kick...

www.pedelecs.co.uk

 

[Nealh]

I think it goes with out saying, if one is buying a new kt & lcd then it is advisable to buy the 1t4 runk cable as well.

 

[Preload]

Neal and Sturmey, thank you for the quick responses, much appreciated.

 

[Nealh]

If one wants a light output as well then a 1t5 cable is available.

 

[Preload]

Project completed and many thanks to all for their response. The 1 to 4 cable wasn't obvious to me when the brain was wrapped in wh, ah voltages motor turns etc so thank you for for mentioning that.

I used topbikekit and the service was fantastic. China to UK in 5 days and no customs issues.

I went for the KT LCD 8 display, a T09s controller which has 22a max current. I decided as the original controller was 17a max I could dial the new controller back to 18a.

My battery is 36v, 8.7ah (313wh). But I have no idea other than the original controller max amp, what I can safely pull from this battery. Anyone have the knowledge?

End result is a lovely smooth motor at each of the pedal assist modes, throttle is a bonus.
I found the best limit for speed was 32kph or 20mph. This motor can't give any more than that at this voltage, bike and rider weight etc.

Speed wasn't the issue for me. A nice display, programmable settings and a better understanding of the system was what I was looking for.
Thanks again to all that's exactly what I got and more.

 

[Nealh]

Depends how many cells in parallel, being 8.7ah they are likely 2900mah cells. If they have used genuine branded cells they will be a Sam 29E or Panny PF. Both will take 22a but may suffer longevity so the 17/18a threshold is ok.

 

[Preload]

Cheers Nealh, nice info to know.

 

[essex_chris]

Project completed and many thanks to all for their response. The 1 to 4 cable wasn't obvious to me when the brain was wrapped in wh, ah voltages motor turns etc so thank you for for mentioning that.

I used topbikekit and the service was fantastic. China to UK in 5 days and no customs issues.

I went for the KT LCD 8 display, a T09s controller which has 22a max current. I decided as the original controller was 17a max I could dial the new controller back to 18a.

My battery is 36v, 8.7ah (313wh). But I have no idea other than the original controller max amp, what I can safely pull from this battery. Anyone have the knowledge?

End result is a lovely smooth motor at each of the pedal assist modes, throttle is a bonus.
I found the best limit for speed was 32kph or 20mph. This motor can't give any more than that at this voltage, bike and rider weight etc.

Speed wasn't the issue for me. A nice display, programmable settings and a better understanding of the system was what I was looking for.
Thanks again to all that's exactly what I got and more.

Morning Preload. Read this thread with great interest as i have just got hold of a Vengeance with the 790 second hand.

Mine had a cracked magnet disc which when the chain slipped has actually broken in pieces - but i have managed to jerry rig something temporarily. I am looking to do similar to you and make a few upgrades so wanted to check - is this where you are referring to?

TopBikeKit Store - Amazing prodcuts with exclusive discounts on AliExpress

Discover the wide range of from AliExpress Top Seller TopBikeKit Store.Enjoy ✓Free Shipping Worldwide! ✓Limited Time Sale ✓Easy Return.

www.aliexpress.com

I'm going to do some research today and look at those components you mentioned. I'll start my own thread and include some photos of what i currently have to confirm with the much more knowledgeable people on here before i go ahead.

Are you pleased and what did you spend in total? Thanks

 

[Preload]

Morning Preload. Read this thread with great interest as i have just got hold of a Vengeance with the 790 second hand.

Mine had a cracked magnet disc which when the chain slipped has actually broken in pieces - but i have managed to jerry rig something temporarily. I am looking to do similar to you and make a few upgrades so wanted to check - is this where you are referring to?

TopBikeKit Store - Amazing prodcuts with exclusive discounts on AliExpress

Discover the wide range of from AliExpress Top Seller TopBikeKit Store.Enjoy ✓Free Shipping Worldwide! ✓Limited Time Sale ✓Easy Return.

www.aliexpress.com

I'm going to do some research today and look at those components you mentioned. I'll start my own thread and include some photos of what i currently have to confirm with the much more knowledgeable people on here before i go ahead.

Are you pleased and what did you spend in total? Thanks

Hi Chris, I'm very pleased with the outcome using the parts mentioned. I bought direct from topbikekit.com rather than Ali express shop. Total cost Inc delivery was about £160.

 

[essex_chris]

I've ended up with an S866 controller and display after my stock controller died on me.

The stock motor on my 2019 Vengeance E is a Bafang BFSWX02 36V250W (12)

What i'm really not sure about now is what settings to use on the controller regarding magnets or zero start. I also can't work out at present where to attach the 3 wire pas sensor - the plugs are different but it's no problem i can solder them together ok.

After initially wiring up the battery terminal connectors, the blue/yellow/green motor phase wires and then the 6 cable for motor hall sensors i could hear the motor spinning but figured it was the wrong way.

Found the manual referring to brown and black lines - but theres a purple cable on the controller which when connected worked and meant that once powered on the wheel spins - but it's very low power. Though it does adjust when pushing the + and - for adjusting the PAS level.

I have a 3 pin throttle from amazon with black/red/green wires - nothing corresponding on the leads out of the controller. Ideally i'd like to set it up with both the pas and the throttle. If possible i'd like to set it it up for more than 25.5kph - even at my weight the stock setup felt it could od more - but was limited.

The Vengeance has brake connectors with juliet cables - but not sure about wiring that up.

Would it be worthwhile starting a new thread and putting lots of photos of what i had and what i've got? Thanks in advance for any help

 

[AGS]

Either post here or start a new thread with plenty of photos including the controller and connectors. Then someone will advise you what to do.