Bafang M510 RS - discussion, tuning, firmwares

[temon10]

Hi,

I want to order same frameset as yours and build new bike.

If you think now, which motor would you recommend: 510RS or 560RS?


Thanks!


UPD:
Read some info, did weight calculation, and decided to go with 560RS. In case something is not OK, will switch to 510RS.

just choose M560...not RS

 

[Dado]

Also been thinking why discontinued RS model.
Gonna just thinking loud what I would do if I was in a developement management.

DJI motor is in same league as M560. And as you can not reach similar level without planetary gearing, I would decide to end with old classic gearing in RS. And rather go with brand new developement of case and planetary gearing with 3 nylon planets.

Hope this is not just a dream.


Ah, and that 1500W peak of new DJI... remarkable, unbelievable.
Lets see for a dyno test though. If 1500W mechanical for real, that will be like 47A with 36V batt. Also is question for how long.
I had M620 with higher power (50A 48V) and saw how motor temperature can raise quickly. Then thermal management kicked in and I was back at 1500W. And thats 5.5 kg motor.

Anyway, interesting they did choose again 36V! And also that funny round battery case. Never seen it. There could be 10 4680 cells (Musk has them in Cybertruck). Or this 10S1P configuration with some shorter cells. As 80cm looks to me too much to fit in downtube.

 

[Goff]

Also been thinking why discontinued RS model.
Gonna just thinking loud what I would do if I was in a developement management.

DJI motor is in same league as M560. And as you can not reach similar level without planetary gearing, I would decide to end with old classic gearing in RS. And rather go with brand new developement of case and planetary gearing with 3 nylon planets.

Hope this is not just a dream.


Ah, and that 1500W peak of new DJI... remarkable, unbelievable.
Lets see for a dyno test though. If 1500W mechanical for real, that will be like 47A with 36V batt. Also is question for how long.
I had M620 with higher power (50A 48V) and saw how motor temperature can raise quickly. Then thermal management kicked in and I was back at 1500W. And thats 5.5 kg motor.

Anyway, interesting they did choose again 36V! And also that funny round battery case. Never seen it. There could be 10 4680 cells (Musk has them in Cybertruck). Or this 10S1P configuration with some shorter cells. As 80cm looks to me too much to fit in downtube.

The battery cells are DJI own design, this first time I seen a manufacturer come with a game changer battery like this

 

[Dado]

Thats right. What a step forward in ebike batteries!
So far nobody had this idea to put just 10 big cells into battery. Also it will speed up building the battery and simpler construction.
It is funny they have stayed with 36V.

 

[TQFreak]

Lower voltage allows to keep the battery , the controller and the motor cost lower.

 

[TCD333]

The battery cells are DJI own design, this first time I seen a manufacturer come with a game changer battery like this

These battery cells are almost certainly made by another supplier to DJI's specs. I would have thought these were re purposed from another cell application of same dimensions but I can't think of one. It's hard to fathom paying off the Tooling costs of a custom sized cell for such low volumes. There must be an EV (or other) application of this cell size somewhere. WRT 48V vs 36V, the deal breaker might have been the extra length of additional cells required.

 

[Dado]

Maybe can pay off. You can sell cells also to other brands.
Yes, length of cell had to be selected to put 10 of them to fit to bottom tube. I was measuring straight length of down tube.

 

[Waynemarlow]

How many bikes or battery packs do you think Amflow will sell, bear in mind that EU sales are tiny in proportion to the US which is probably even smaller than to the Asian markets ?

Even if we say a low number like 20000 battery packs over say 3 years, that’s 200000 individual cells. If we push say 100K battery packs then you’re into 1M cells. Those are not small numbers if DJI intends to supply other industries such as powering their large scale drones

 

[Dado]

As far as I know in Asia is not ebike market that big. Chinese for example do not buy ebikes. They have electric scooters.

And why you think they sell only 20 000 batteries in 3y?

 

[TCD333]

How many bikes or battery packs do you think Amflow will sell, bear in mind that EU sales are tiny in proportion to the US which is probably even smaller than to the Asian markets ?

Even if we say a low number like 20000 battery packs over say 3 years, that’s 200000 individual cells. If we push say 100K battery packs then you into 1M cells. Those are not small numbers if DJI intends to supply other industries such as powering their large scale drones

OK - let's crunch some more numbers. I asked AI to list the top 20 Li Ion battery *cell* manufacturers by order of yearly GWh production. The 20'th (smallest) producer of cells was Exide Technologies, reportedly now transitioning to Li Ion, producing 5 to 15GWh, let's say 10GWh / year. Assuming an 800Wh battery pack that would be over 12 million bikes / year. So I then asked what are all the current produced Li Ion cell cylindrical formats. The only thing that comes close is Tesla's 4680 and a few other 46xx formats which look similar diameter but much longer. The other thing to consider is these cells would be NCM/NCA composition (not LFP) for highest energy density which are the most volatile and trickiest to make being more susceptible to thermal runaway and dendrites etc. I asked AI about this form factor specifically produced by DJI for Ebikes and there are some interesting take aways. Much lower cell impedance (note they are only quoting the 1500W with *their cells), better thermal management with integrated management pcb. The internal cell impedance is also a reason they didn't have to go to a 48V system to achieve these crazy numbers. AI also agreed, they are almost certainly having cells made by someone like CATL etc to their specs. It will be interesting to see how this unfolds.

 

[Dado]

Yes, it is a big revolution and leap forward. I am happy.

They have saved 36V to be compatible with M1 I guess. But this is not the way with 36V. At 1500W it is 45Amps.

Hope next will be little shorter cells to fit 13 of them.
And If I remember right, Brose has even 14S!

 

[patdam]

Première sortie sur de vraies montagnes, sur une piste bien connue 31,4 km 1221 m D+. Cadre intérieur E10, avec une toute nouvelle batterie E10 de Joeybike (15Ah, 21700, 5A cellules). Bien mieux que mon ancien M510 rev2 et mon ancien 17AH E10 et la batterie 15Ah dans le premier cadre où j’ai testé le RS. Ascension facile, avec plus de puissance facilement utilisée et bas régime nécessaire (60 tr/min), et la très faible consommation (ou une très bonne efficacité de la batterie). 900 m D+ avec 30 % consommés et 300 m D+ avec 20 % en mode Sport+ réglé en mode automatique.

Je suis vraiment surpris par l’efficacité de ce couple 510RS/batterie. Avec l’E10, c’est un super vélo

 

[Dado]

Guys, anybody has 750W version for RS? If so, pls. share.

I have tried to flash v1.6 (750W) into RS. It booted fine, but to my surprise throttle was not working. And also original speed sensor (and disc with 42 holes) was not working

 

[patdam]

Guys, anybody has 750W version for RS? If so, pls. share.

I have tried to flash v1.6 (750W) into RS. It booted fine, but to my surprise throttle was not working. And also original speed sensor (and disc with 42 holes) was not working

me too. I'm waited returns to compare

 

[dimati_house]

Guys, anybody has 750W version for RS? If so, pls. share.

I have tried to flash v1.6 (750W) into RS. It booted fine, but to my surprise throttle was not working. And also original speed sensor (and disc with 42 holes) was not working

I will have it in 2-4 weeks. Waiting devliery now.

 

[Charly]

Première sortie sur de vraies montagnes, sur une piste bien connue 31,4 km 1221 m D+. Cadre intérieur E10, avec une toute nouvelle batterie E10 de Joeybike (15Ah, 21700, 5A cellules). Bien mieux que mon ancien M510 rev2 et mon ancien 17AH E10 et la batterie 15Ah dans le premier cadre où j’ai testé le RS. Ascension facile, avec plus de puissance facilement utilisée et bas régime nécessaire (60 tr/min), et la très faible consommation (ou une très bonne efficacité de la batterie). 900 m D+ avec 30 % consommés et 300 m D+ avec 20 % en mode Sport+ réglé en mode automatique.

Je suis vraiment surpris par l’efficacité de ce couple 510RS/batterie. Avec l’E10, c’est un super vélo
View attachment 183137

 

[Goff]

It looks like the M510RS are available again
I have a question about the voltage are they only available in 48V
All my batteries are 36V

I just found this on AliExpress: | 2026 Newest b-fang M510RS Ebike Central Motor Can Protocol 48V 110Nm 250w Engine EMTB Electric Mountain Bike Middle Drive Motor

Neuester B-Fang M510RS E-Bike Mittelmotor mit CAN-Protokoll, 48V 110Nm 250W Motor für E-MTB Elektro-Mountainbikes - AliExpress 201355758

Smarter Shopping, Better Living! Aliexpress.com

a.aliexpress.com

 

[Dado]

Also available in 36V.

Just to update firmware to 36V in your motor.

 

[Caio]

It looks like the M510RS are available again
I have a question about the voltage are they only available in 48V
All my batteries are 36V

I just found this on AliExpress: | 2026 Newest b-fang M510RS Ebike Central Motor Can Protocol 48V 110Nm 250w Engine EMTB Electric Mountain Bike Middle Drive Motor

Neuester B-Fang M510RS E-Bike Mittelmotor mit CAN-Protokoll, 48V 110Nm 250W Motor für E-MTB Elektro-Mountainbikes - AliExpress 201355758

Smarter Shopping, Better Living! Aliexpress.com

a.aliexpress.com

View attachment 184746

I came across a Facebook post from Chili Chen saying she is no longer working with the M510 RS. From what I’ve seen in online discussions, the model may have been discontinued. There are also suggestions that Bafang has been developing a new motor with planetary gears to compete with Avinox, which could explain why the M510 RS is being phased out in favor of a redesigned and improved version. For that reason, I’d recommend holding off on purchasing the M510 RS for now.

 

[Dado]

I am also thinking they will need to switch to planetary, as I dont see any other design solution if needed more power.

 

[Waynemarlow]

I am also thinking they will need to switch to planetary, as I dont see any other design solution if needed more power.

Add a CVT on the side of the planetary and Bafang would be getting ahead, wishful thinking on my part

 

[Dado]

Add a CVT on the side of the planetary and Bafang would be getting ahead, wishful thinking on my part

Not sure if CVT, but gears will ve for sure integrated in a motor in the future. And then belt to wheel.

 

[Waynemarlow]

Not sure if CVT, but gears will ve for sure integrated in a motor in the future. And then belt to wheel.

Gears are heavy, planetary with 1 drive motor and 1 very small motor controlling the speed of the planetary will give us all the range and control we need.

 

[Dado]

Gears are heavy, planetary with 1 drive motor and 1 very small motor controlling the speed of the planetary will give us all the range and control we need.

Special solution of planetary like in Prius - thats where my interest in electric drivetrains started. Would be nice. But I doubt there will be 2 motors/generators in a body. Also would do big losses when you would be changing output rpms with second motor/generator.

 

[Waynemarlow]

Special solution of planetary like in Prius - thats where my interest in electric drivetrains started. Would be nice. But I doubt there will be 2 motors/generators in a body. Also would do big losses when you would be changing output rpms with second motor/generator.

Owuru’s gearbox unit – the Pinion MGU killer?

With their new gearbox unit, Owuru unveil a stepless, fully automatic motor/gearbox unit delivering up to 150 Nm of torque and 1,000 W peak power. Here's what we thought of it on the trail.

ebike-mtb.com

 

[Dado]

Owuru’s gearbox unit – the Pinion MGU killer?

With their new gearbox unit, Owuru unveil a stepless, fully automatic motor/gearbox unit delivering up to 150 Nm of torque and 1,000 W peak power. Here's what we thought of it on the trail.

ebike-mtb.com

Wow, didnt know somebody has motor like this. And Decathlon!
And even with 1000W. Will be watching them.

There will be losses due to that second motor, which is braking usually, to maintain the output rpms. Then you loosing energy all the time. Could be nice and unknown feeling not to shifting on a bike.

With standard sequential gear transmission like in Pinion is very low losses, like 3%. You know how people are sensitive to ebike consumption.
I am looking forward for pinion like motors, also the idea have it all in oil is great.

 

[jiol]

Guys, anybody has 750W version for RS? If so, pls. share.

I have tried to flash v1.6 (750W) into RS. It booted fine, but to my surprise throttle was not working. And also original speed sensor (and disc with 42 holes) was not working

Hey guys, I received a 510rs with a CEF-69 frame I purchased from SZZS. The bike geo and ride are incredible even on basic build - Shimano 11spd cues, Fox 38 GRIP 180, DVO shock. The motor out of the box was fantastic! Responsive, powerful, and intuitive. It must be efficient as the battery seems to be near infinite. On rides I'd do a battery swap in my Shimano e8035 500wh battery, I've still got 65%+ left on the 800wh battery.

The bad news - I foolishly updated the firmware via the Bafang Go app and now it's horrible. The power surges in, is extremely delayed (even at the least delay setting), speed caps out at 15mph (what the heck??) and kind of sucks now to be honest.

What can I do? I can purchase a besst pro device and get a license but wondering if there is a firmware out there that supports my 48v battery and that new sensor. Open to any ideas and also please let me know if there's anything about the bike or system I can provide feedback on.

Serial number	M510RS************
Hardware version	CR X10N.510.FC 4.0
Software version	M510RSC4816F804002.4

 

[patdam]

Hey guys, I received a 510rs with a CEF-69 frame I purchased from SZZS. The bike geo and ride are incredible even on basic build - Shimano 11spd cues, Fox 38 GRIP 180, DVO shock. The motor out of the box was fantastic! Responsive, powerful, and intuitive. It must be efficient as the battery seems to be near infinite. On rides I'd do a battery swap in my Shimano e8035 500wh battery, I've still got 65%+ left on the 800wh battery.

The bad news - I foolishly updated the firmware via the Bafang Go app and now it's horrible. The power surges in, is extremely delayed (even at the least delay setting), speed caps out at 15mph (what the heck??) and kind of sucks now to be honest.

What can I do? I can purchase a besst pro device and get a license but wondering if there is a firmware out there that supports my 48v battery and that new sensor. Open to any ideas and also please let me know if there's anything about the bike or system I can provide feedback on.

Serial number	M510RS************
Hardware version	CR X10N.510.FC 4.0
Software version	M510RSC4816F804002.4

This is your current software revision ? after your bafang go update) ? i have the same (original delivery) and i'm enjoy with it. If you have another revision before your update, say us what it is .

You can try to request to SZZS to provide you the software update (and share here );

About speed limit, where are you lacated ? i'm in EU and i have the same speed limit (25 Km/h), nothing anormal .

 

[jiol]

This is your current software revision ? after your bafang go update) ? i have the same (original delivery) and i'm enjoy with it. If you have another revision before your update, say us what it is .

You can try to request to SZZS to provide you the software update (and share here );

About speed limit, where are you lacated ? i'm in EU and i have the same speed limit (25 Km/h), nothing anormal .

SZZS says they're reaching out to Bafang for that file/info - will do

I'm in the US - The speed limit previously must have been 28mph or something because I never really topped it out. 15mph is slow enough I notice it on flowy trails and thought something was wrong!

 

[patdam]

SZZS says they're reaching out to Bafang for that file/info - will do

I'm in the US - The speed limit previously must have been 28mph or something because I never really topped it out. 15mph is slow enough I notice it on flowy trails and thought something was wrong!

Normally in US you could set max speed at 28mph. I can't help you. I didn't use bafang go (only BESST tool) and in my country when i modified the motor parameters, max speed limit automatically at 25 km/h. No a problem for me, i use motor only to climb on moutain. Request help from SZZS, or another customer in US who use series M motor, or dado. If you recive an software rev (file.bin). Please share it here.