Bafang m820

savas · Mar 23, 2023

Sounds really good.So with the cef50 frame we can expect around 17kg bike and with light carbon 17.5

LAnton · Mar 23, 2023

savas said:
Sounds really good.So with the cef50 frame we can expect around 17kg bike and with light carbon 17.5

17 kg is a good weight.

Suns_PSD · Mar 23, 2023

savas said:
Sounds really good.So with the cef50 frame we can expect around 17kg bike and with light carbon 17.5

Where are you getting that 17kg assumption from?

Is it because this particular frame weighs 2kgs more than the CEF50 or something else?

It's not easy to get bikes light, trust me, I know.

LAnton's bike weighs 18.9kgs (congrats btw!), with some componentry that I'd consider wholly inadequate for my pedal bike, much less my e-bike.

I'll be lucky to get my Relay to 20 kgs. Real lucky actually.

savas · Mar 23, 2023

Suns_PSD said:
Where are you getting that 17kg assumption from?

Is it because this particular frame weighs 2kgs more than the CEF50 or something else?

It's not easy to get bikes light, trust me, I know.

LAnton's bike weighs 18.9kgs (congrats btw!), with some componentry that I'd consider wholly inadequate for my pedal bike, much less my e-bike.

I'll be lucky to get my Relay to 20 kgs. Real lucky actually.

Because the dengfu e10 frame weighs around 4.2,4.4 kg

badIuck · Mar 26, 2023

But @LAnton s weight is with his diy 1500g battery? the regular 410wh battery with case weighs 2650g (claimed).
I have a ca. 17kg Levo SL with DH tires and from my calculations with the CEF50/M820/410wh you'll add around 1100g compared to the Levo SL frame+battery+motor. So not sub 18kg unless super weightweenie.

LAnton · Mar 26, 2023

The M820 engine is noisier than the M510 engine. The noise of the motor is very clearly audible. The M820 motor is about 30% weaker than the M510. I didn't understand how to turn on boost 95N mode. I drove 29 km on a 360W battery at 100% power.

WhatsApp Image 2023-03-25 at 19.02.24.jpeg

temon10 · Mar 26, 2023

LAnton said:
The M820 engine is noisier than the M510 engine. The noise of the motor is very clearly audible. The M820 motor is about 30% weaker than the M510. I didn't understand how to turn on boost 95N mode. I drove 29 km on a 360W battery at 100% power.

View attachment 110119

is there power reduce under 30% battery power?

savas · Mar 26, 2023

What was the max wattage you saw?

LAnton · Mar 28, 2023

temon10 said:
is there power reduce under 30% battery power?

I saw a decrease in power after 10%

LAnton · Mar 28, 2023

savas said:
What was the max wattage you saw?

I wasn't looking for power

temon10 · Mar 28, 2023

LAnton said:
I saw a decrease in power after 10%

that's good. How about power delivery, is it smooth?

LAnton · Mar 29, 2023

temon10 said:
that's good. How about power delivery, is it smooth?

I didn't notice the difference between the M820 and the M510. I liked the way the M820 rides. For the last six months I have been driving the M510 with reduced power up to 70%. I had to get used to the new motor

temon10 · Mar 29, 2023

LAnton said:
I didn't notice the difference between the M820 and the M510. I liked the way the M820 rides. For the last six months I have been driving the M510 with reduced power up to 70%. I had to get used to the new motor

Wow 70% is much. Do you think it's appropriate between the decrease in power and battery usage?

TCFlowClyde · Mar 29, 2023

temon10 said:
is there power reduce under 30% battery power?

Great question!

TCFlowClyde · Mar 29, 2023

LAnton said:
I didn't notice the difference between the M820 and the M510. I liked the way the M820 rides. For the last six months I have been driving the M510 with reduced power up to 70%. I had to get used to the new motor

Did you figure out how to use the super boost 95Nm mode yet?

This feature should really be the key to this motor... separates it from the pack of the RS60, Fazua60, and EonDrive60

TeoElFeo · Mar 29, 2023

Well, I wouldn't get too excited about the 95nm and rather take it with a grain of salt. So M510 claims to have those 95nm, yet Bosch Gen 4 with the claimed 85nm has considerably more grunt, especially at low RPMs. Even m500 claimed to have them and I was really disappointed in the power delivery of that motor...

LAnton · Mar 29, 2023

TCFlowClyde said:
Did you figure out how to use the super boost 95Nm mode yet?

This feature should really be the key to this motor... separates it from the pack of the RS60, Fazua60, and EonDrive60

I haven't figured out how to turn on 95N yet. I'll try to find out on the weekend using the "finger poke method"

TCFlowClyde · Mar 29, 2023

Suns_PSD said:
Where are you getting that 17kg assumption from?

Is it because this particular frame weighs 2kgs more than the CEF50 or something else?

It's not easy to get bikes light, trust me, I know.

LAnton's bike weighs 18.9kgs (congrats btw!), with some componentry that I'd consider wholly inadequate for my pedal bike, much less my e-bike.

I'll be lucky to get my Relay to 20 kgs. Real lucky actually.

LAnton said:
I haven't figured out how to turn on 95N yet. I'll try to find out on the weekend using the "finger poke method"

Don't electrocute yourself please.

Hope you can discover it soon. That turbo burst mode should be an awesome distinguishing feature....even it's just 85-90 Nm +/-

TCFlowClyde · Mar 29, 2023

LAnton said:
I haven't figured out how to turn on 95N yet. I'll try to find out on the weekend using the "finger poke method"

I'm sure you have already considered it. Have you tried both the DPC181 separately from the DPC245, since you have both?

Maybe turbo burst 95Nm only works with OEM DPC 181? Just curious.

Also, well done on adapting the M820 to your M510 frame. That was a clever pioneering, modification!!!

You're our test pilot, so thanks for being willing to share your experiment...it's how we all learn.

savas · Mar 29, 2023

LAnton said:
I haven't figured out how to turn on 95N yet. I'll try to find out on the weekend using the "finger poke method"

Please check also the max wattage .Something i am interested.I guess it should be max 500w

forsa355 · Mar 29, 2023

LAnton said:
I haven't figured out how to turn on 95N yet. I'll try to find out on the weekend using the "finger poke method"

have you tried to see if the Bafang Go+ phone app works with the M820 using bluetooth? I wonder if the motor will be configurable from this or other app

LAnton · Mar 30, 2023

TCFlowClyde said:
I'm sure you have already considered it. Have you tried both the DPC181 separately from the DPC245, since you have both?

Maybe turbo burst 95Nm only works with OEM DPC 181? Just curious.

Also, well done on adapting the M820 to your M510 frame. That was a clever pioneering, modification!!!

You're our test pilot, so thanks for being willing to share your experiment...it's how we all learn.

I'll check with remote 181

LAnton · Mar 30, 2023

forsa355 said:
have you tried to see if the Bafang Go+ phone app works with the M820 using bluetooth? I wonder if the motor will be configurable from this or other app

I'm upset, they sent me a remote 244. I bought a 255 remote control together with the motor.

TCFlowClyde · Mar 30, 2023

LAnton said:
I'm upset, they sent me a remote 244. I bought a 255 remote control together with the motor.

But you have the 181 too?

LAnton · Mar 30, 2023

TCFlowClyde said:
But you have the 181 too?

Yes, I'll check with 181 boost and bafang go

temon10 · Mar 31, 2023

LAnton said:
Yes, I'll check with 181 boost and bafang go

Bro, default firmware have delay time motor stop when u stop pedaling? or stop immediately?

LAnton · Apr 1, 2023

LAnton said:
Yes, I'll check with 181 boost and bafang go

I couldn't turn on the boost on remote 181. Remote 181 connects to GO. The remote does not connect to GO+

LAnton · Apr 2, 2023

temon10 said:
is there power reduce under 30% battery power?

I was attentive today. Power drops after 20%

LAnton · Apr 2, 2023

temon10 said:
Bro, default firmware have delay time motor stop when u stop pedaling? or stop immediately?

The motor does not turn off immediately. I hear it 1-1.5 sec.

LAnton · Apr 2, 2023

savas said:
Please check also the max wattage .Something i am interested.I guess it should be max 500w

The maximum power I saw on the screen is 545W

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