SZZS specific CEF50-main thread (initial builds and troubleshooting related only)

[TCFlowClyde]

We need some materials which is safer then carbon else our frame screw or nut area will break

You can put a self adhesive silicon armor at the screw tabs to help absorb the shock. Plus,, they're made for carbon frames.

Personally, I have carbon covering the plastic at all the tabs. So far, three months in, no frame issues...plus there is no plastic alternative unless Bafang wants to give up their trade formula for durable plastic. SZZS has failed on 3 iterations, so Bafang is not assisting them.

 

[patdam]

We need some materials which is safer then carbon else our frame screw or nut area will break

depend of use, i just need lower guard to protect motor from front wheel stone projections, no more. i will never use it to point of support to pass an obstacle

 

[tepe]

Ride on firmware 43V - CRX30PC4313E102001 3_eMTB_230317, battery 48V 20A (21700 4700ma = 18.8A). There were no mistakes. The motor is in Boost mode 40 degrees. The M510 couldn't overtake me on a steep climb

Can you elaborate more: what are benefits of riding with software 43V plus battery 48V ? (power, range, heat, noise etc)

 

[calvintys]

You can put a self adhesive silicon armor at the screw tabs to help absorb the shock. Plus,, they're made for carbon frames.
View attachment 138011
Personally, I have carbon covering the plastic at all the tabs. So far, three months in, no frame issues...plus there is no plastic alternative unless Bafang wants to give up their trade formula for durable plastic. SZZS has failed on 3 iterations, so Bafang is not assisting them.

Few weeks ago I ask SZZS why they don't make carbon battery cover and reply was their engineer worry the carbon battery case might damage it frame so now today I suggest to them why not using something similar to rockguard design but cover the plastic motor cover without using any screw or nut by double side tape. As two piece of motor cover inner plastic n outer carbon but extend the coverage until frame are just like rockguard. She say will suggest it to their engineer and see if that is possible.

 

[un..inc]

New battery holder to replace the 200 gram battery bar.

View attachment 138007

Can you elaborate this a bit more?
Did they send you the files or the physical parts? Could you share the files, If you have them?
What did they say about the parts?
Thanks!

 

[TCFlowClyde]

Few weeks ago I ask SZZS why they don't make carbon battery cover and the reply was their engineer worry the carbon battery case might damage it frame so now so today I suggest to them why not using something similar to rockguard design but cover the plastic motor cover without using any screw or nut by double side tape. As two piece of motor cover inner plastic n outer carbon but extend the coverage until frame are just like rockguard. She say will suggest it to their engineer and see if that is possible.

The SZZS engineering team also developed the first and second ICR headset that don't seem to work. So, might be time to try something new.

My mod-cover seems to be working. If it fails beyond my repair ability, the next step for me is the custom Rockguardz.

Unfortunately, the risk of not have motor cover is higher than having one that is too rigid. But, I think that this is much lower risk than then SZZS has suggested. Also, at this point, my trust of the Rockguardz engineering successes has higher potential than SZZS multiple cover failures.

 

[Myalteregohamish]

folks, my evening flash ride, 25km; 500m elev. gain almost entirely in B mode, 22% of 480Wh battery left. seems like it's eating the battery like a hungry hog. does this battery consumption look ok to you? I was hoping I could squeeze more from this battery...

Yea I've found this motor consumes watts very quickly for the power it puts out. As a comparison I recently built a Super enduro CF bike from another factory with an 840wh battery and I'm getting 7000ft of vert with 30% left. That's built on an m510 motor running it in sport the entire time.

 

[calvintys]

Can you elaborate this a bit more?
Did they send you the files or the physical parts? Could you share the files, If you have them?
What did they say about the parts?
Thanks!

The pic it's send by SZZS to me. It's suppose to replace the aluminium battery bar which hold between battery n frame.

 

[calvintys]

Yea I've found this motor consumes watts very quickly for the power it puts out. As a comparison I recently built a Super enduro CF bike from another factory with an 840wh battery and I'm getting 7000ft of vert with 30% left. That's built on an m510 motor running it in sport the entire time.

SZZS it's a carbon factory and motor cover its plastic so therefore it's required injection molding machine which I don't think SZZS has it. Third party's does it for them.

 

[Myalteregohamish]

I am concerned about your mileage information. I sold a Cube bike with 500Wh battery and Bosh CX motor and paid for a Bafang 820 with 700Wh battery in the hope that I can increase the mileage of the bike by 30 percent.... Do you think I can get what I want?

I don't think so.

 

[Myalteregohamish]

SZZS it's a carbon factory and motor cover its plastic so therefore it's required injection molding machine which I don't think SZZS has it. Third party's does it for them.

You may have responded to the wrong message?

 

[calvintys]

You may have responded to the wrong message?

Opsss sorry ....hahahaha

 

[TCFlowClyde]

SZZS it's a carbon factory and motor cover its plastic so therefore it's required injection molding machine which I don't think SZZS has it. Third party's does it for them.

Yep, and the engineering team likely chooses the 3rd party fabricator to make the plastic. Same with the headsets, 3rd party. Unfortunately, they still don't seem to work. So, failure on the SZZS team to outsource well ultimately.

To be fair they make frames not high precision mechanical parts like headsets, Overall, and most importantly, I do trust the SZZS frame fabrication process, even when they don't for a carbon motor cover. .

 

[92se-r]

Yea I've found this motor consumes watts very quickly for the power it puts out. As a comparison I recently built a Super enduro CF bike from another factory with an 840wh battery and I'm getting 7000ft of vert with 30% left. That's built on an m510 motor running it in sport the entire time.

Were you the one having issues with motor cutting in and out?

 

[ficorama]

here are some details, co2 cartridge in the space where the switch comes. and chain guide

 

[voigtkampff]

here are some details, co2 cartridge in the space where the switch comes. and chain guide

View attachment 138057 View attachment 138058 View attachment 138059 View attachment 138060

are they 3d printed? could you share the CAD files for them or describe where you sourced the chain guide and how you adapted it? I just dropped the chain for the first time a moment ago...

 

[voigtkampff]

As a curiosity, I just used a contraption like in the pic to have a leisure trip with my 4yrs old daughter. Quite ridable setup, she loved it. Now she demands that I teach her to send jumps and drops on her Woom 3.

 

[ficorama]

are they 3d printed? could you share the CAD files for them or describe where you sourced the chain guide and how you adapted it? I just dropped the chain for the first time a moment ago...

co2 carrier is not 3d print. I took the aluminum cover from the cef50, and found the thread for the co2 cartridge. a friend welded it. the chain guide is adapted, I turned the motor screw so that the m6 thread is towards the chainring. I used an m6 thread, screwed it with a nut and placed it to get the measurement. very simple solution.

 

[Myalteregohamish]

Were you the one having issues with motor cutting in and out?

Yea I was and it went away and has recently come back with a vengeance.

 

[mike_kelly]

As a curiosity, I just used a contraption like in the pic to have a leisure trip with my 4yrs old daughter. Quite ridable setup, she loved it. Now she demands that I teach her to send jumps and drops on her Woom 3.

What kinda travel can the Woom 3 have
Here it comes "daddy can I have a ZEB 38 for my birthday?"

 

[92se-r]

Yea I was and it went away and has recently come back with a vengeance.

Does it do it with lower assist levels or only boost?

 

[un..inc]

Did anyone try the following chainguide / rock guard?

Bafang Ultra Chain Guide

Chain Guide for Bafang ULTRA Motors Ideal for retrofitting, including crash plate. This chain guide fits the motor type G510.1000 and is compatible with chainring sizes…

fasterbikes.eu

Might it fit the M820?

Or Maybe this chain guide:

ZTTO MTB Bafang Motor E-bike Kette Führer Ober Direct Mount CG08 Einstellbar Für Elektrische Fahrrad Ebike 1X Kettenblatt - AliExpress 18

Smarter Shopping, Better Living! Aliexpress.com

de.aliexpress.com

 

[voigtkampff]

ZTTO MTB Bafang Motor E-bike Kette Führer Ober Direct Mount CG08 Einstellbar Für Elektrische Fahrrad Ebike 1X Kettenblatt - AliExpress 18

Smarter Shopping, Better Living! Aliexpress.com

de.aliexpress.com

Kette Fuhrer, I'm in love with this translation xd

 

[un..inc]

Kette Fuhrer, I'm in love with this translation xd

Well...

 

[ficorama]

two runs done, battery empty. after 2 rides the battery was discharged to 18%. the pictures show the mileage and altitude. mostly driven T, S, S+. occasionally E and B. most of the ascents are forest roads, stones roots dirt.... I am very satisfied. I can say that the power of the m820 is not much weaker than the turbo levo, maybe max 15% weaker. this is a light full power emtb. unlike the m510, the motor is much better in pedalling. it responds better at lower cadences, modulates power delivery much better and provides support at higher 90-110 cadences.

 

[calvintys]

This is my E setup , reduce the power output to 9% n acceleration to 2 it's the best feel. Even during DH , smooth like butter. When I ride with stronger analogue rider I am just a little ahead of them. Now i ride my bike on E , it feel like i am riding my RB BMC Teammachine slr 01 ltd without motor on flat but provide some pedal assist during climb.

 

[voigtkampff]

my investigation into battery level indicator jumping by large values continues... I see the contacts of battery XT30 connector are covered by some kind of dark patina. They are supposed to be gold plated so I don't quite understand why this happens but who knows, maybe they are the culprit. The question remains, how to safely clean them when I can't just disconnect this cable from the battery, which must remain charged to 40+ volts at all times? And how to ensure they won't "rust" again?

 

[patdam]

my investigation into battery level indicator jumping by large values continues... I see the contacts of battery XT30 connector are covered by some kind of dark patina. They are supposed to be gold plated so I don't quite understand why this happens but who knows, maybe they are the culprit. The question remains, how to safely clean them when I can't just disconnect this cable from the battery, which must remain charged to 40+ volts at all times? And how to ensure they won't "rust" again?

overheating => bad contact (may be where cable weld ?) . may be better to change connectors. investigate if correct continuity on cables

 

[CarolinaCrawler]

I recently built a Super enduro CF bike from another factory with an 840wh battery

This sounds intriguing. What frame is this?

 

[ficorama]

hello everyone. I removed all unnecessary things from the bike. under 21kg, ready to drive, DIY 700wh battery.