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

[Myalteregohamish]

I got my DP C245 v3 from Linda.
@thaeber These are almost exactly the same settings I used.

My initial stock settings felt ok. But I wanted the motor to assist earlier, there was a delay before the motor assisted.
Changing the angle startup to 0 solved this problem.

Ok so a couple of things; it is true when torque is applied to the pedals 0° helps. However, when you’re going downhill and you’re in to low a gear, you have to be in a gear that produces torque of some measurable kind, in order to get the motor to spin up. This is somewhat different than the amount of torque required on my Shimano motor, the Shimano motor tends to be much more sensitive and feels much more natural as result. From what I’ve seen, there’s nothing in the BESST tool, or in the iOS app that affects this behavior.

 

[spokémon]

Ok so a couple of things; it is true when torque is applied to the pedals 0° helps. However, when you’re going downhill and you’re in to low a gear, you have to be in a gear that produces torque of some measurable kind, in order to get the motor to spin up. This is somewhat different than the amount of torque required on my Shimano motor, the Shimano motor tends to be much more sensitive and feels much more natural as result. From what I’ve seen, there’s nothing in the BESST tool, or in the iOS app that affects this behavior.

I haven't seen anything in the App to adjust the torque sensor sensitivity. Maybe try playing with "Acceleration Feature"? Try max acceleration?

 

[spokémon]

Carbon battery cases cost a little more.

Any more details on this? Are they producing this yet? Photos and kg?

 

[spokémon]

I just remembered. Linda sent this photo to me a week ago. Still in testing stage I think. So exciting!

 

[spokémon]

Looks like there won't be a carbon motor cover. The stiffness of the carbon cover may potentially damage the frame if it hits a rock. They are looking at a softer plastic material.

 

[TCFlowClyde]

Looks like there won't be a carbon motor cover. The stiffness of the carbon cover may potentially damage the frame if it hits a rock. They are looking at a softer plastic material.

I'm no material scientist but apparently a few aftermarket carbon bash guards seem to be OK on Specialized Kenevos and Levos for both carbon and aluminum frames.

Sure they'll be more expensive than plastic, but this is the 3 rd attempt by SZZS to get it fixed. So, I was advocating for carbon with a thinner profile. Disappointed that they are ditching the carbon bash guard upgrade. Certainly stronger and thinner... probably weighing less too. But put the absorption frame armor on to deaden vibration up the frame...and boom! Great upgrade! (IMHO).

 

[temon10]

Repaint and rebuild after 2 months recovery from broken collarbone. Happy to be back again.

 

[calvintys]

Anyone know the weight for m820 crank spider

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[brbr]

Anyone know the weight for m820 crank spider

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on my side, I've bought a m510 spider on Aliexpress and the offset seems completely wrong. I did not installed it but when compared to the original 34t chainring, it seems completely different

 

[patdam]

on my side, I've bought a m510 spider on Aliexpress and the offset seems completely wrong. I did not installed it but when compared to the original 34t chainring, it seems completely different

they are dedicated to fat bike

 

[Lehr]

Repaint and rebuild after 2 months recovery from broken collarbone. Happy to be back again.

Does your motor crunch when going downhill?

 

[Zimmerframe]

Anyone know the weight for m820 crank spider

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The Vitus m510 crank is about 270g if that helps.

 

[temon10]

Does your motor crunch when going downhill?

there are rattles sound like Shimano EP8. But it's Ok for me.

 

[thaeber]

View attachment 125571 View attachment 125572
View attachment 125573
Repaint and rebuild after 2 months recovery from broken collarbone. Happy to be back again.

Looks like You have blue blood Mylord

 

[Myalteregohamish]

Does your motor crunch when going downhill?

Mine doesn’t.

 

[Myalteregohamish]

I haven't seen anything in the App to adjust the torque sensor sensitivity. Maybe try playing with "Acceleration Feature"? Try max acceleration?

Did some on the trail testing and it seems what works best to give the motor the most natural feel for me is turning acceleration down to two, and using the offset start up at around 11%. This is also conserved considerable battery. But mainly has reduced that binary on an off feel the motor comes stock with.

 

[temon10]

Tried this firmware for a while. I think this make better power delivery than my previous 102002.2 firmware. Later will test power decrease under 20% battery.

 

[temon10]

Btw for mullet setting, what is correct setting for wheelset size and wheel circumference value to make speedometer on the right value??

 

[calvintys]

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Ti Shock nut

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Shock niddle Bearing bush

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[Myalteregohamish]

Tried this firmware for a while. I think this make better power delivery than my previous 102002.2 firmware. Later will test power decrease under 20% battery.

What would you say are the major differences with this firmware vs the stock.

 

[thaeber]

The Vitus m510 crank is about 270g if that helps.

Do You have a link please?

 

[thaeber]

Btw for mullet setting, what is correct setting for wheelset size and wheel circumference value to make speedometer on the right value??

Arround 2.250 mm for 27.5 x 2.6. I run 2.100 mm, giving a little tailwind on max speed, but still withing legal limits (25 kmh + 10% max)

 

[Zimmerframe]

Do You have a link please?

They fit the M510, is that the same crank fitment as the M820 ??

https://www.chainreactioncycles.com/p/bafang-m510-right-crank-arm-vitus-e-mythique-lt

Miranda do one which also fits (M510) - search for Delta LS from what I remember ..

 

[thaeber]

They fit the M510, is that the same crank fitment as the M820 ??

https://www.chainreactioncycles.com/p/bafang-m510-right-crank-arm-vitus-e-mythique-lt

Miranda do one which also fits (M510) - search for Delta LS from what I remember ..

Thanks mate! I run the Miranda 160, great crank / fair price. I think the M820 uses standard spline..

 

[Neeko DeVinchi]

Guys, I've been so impressed with this thread,

you've all inspired me to get one

Gotta be honest, I've not really spent much time on super light/mid assist emtbs.

So this will be a treat. Not sure if it's been mentioned before. But I was surprised to find that the main rocker link is also made out of carbon aswell.

To play it safe, I'll opt to run an air shock

Lol. They even went as far as install the headset cups. Bless!!

Cable routing seems simple. And I should be able to run a lighter battery compared to the 43v Bafang proprietary battery.

Dropper insertion seems generous on this XL. But the charge port could pose a potential problem. But I'll grab a 210 one up dropper this weekend.

Still can't get over the fact that the rocker link is carbon as well!!!

The lack of a seat stay bridge does have me questioning the torsional stiffness in the rear. But I'll reserve judgement for now.

But considering that this frame is made out of a stronger grade of Carbon compared to other frames I've built up,

Initial impressions are pretty good.

Like I said, thanks to everyone who's contributed to this frame on this thread. Seriously, it's taken a lot of the "guess work" out of the equation

 

[Myalteregohamish]

Guys, I've been so impressed with this thread,
View attachment 125791
you've all inspired me to get one
View attachment 125792
Gotta be honest, I've not really spent much time on super light/mid assist emtbs.
View attachment 125793
So this will be a treat. Not sure if it's been mentioned before. But I was surprised to find that the main rocker link is also made out of carbon aswell.
View attachment 125794
To play it safe, I'll opt to run an air shock
View attachment 125795
Lol. They even went as far as install the headset cups. Bless!!
View attachment 125796
Cable routing seems simple. And I should be able to run a lighter battery compared to the 43v Bafang proprietary battery.
View attachment 125797
Dropper insertion seems generous on this XL. But the charge port could pose a potential problem. But I'll grab a 210 one up dropper this weekend.
View attachment 125798
Still can't get over the fact that the rocker link is carbon as well!!!
View attachment 125799
The lack of a seat stay bridge does have me questioning the torsional stiffness in the rear. But I'll reserve judgement for now.
View attachment 125800
But considering that this frame is made out of a stronger grade of Carbon compared to other frames I've built up,
View attachment 125801
Initial impressions are pretty good.

Like I said, thanks to everyone who's contributed to this frame on this thread. Seriously, it's taken a lot of the "guess work" out of the equation

Looks good Neeko and likewise, your videos helped me understand the bafang ecosystem a bit better.

 

[TCFlowClyde]

Does anyone with our CEF50 frame and big 720Wh battery know what type of 21700 cells that are being used?

SZZS and Linda are on holiday which is too long to satisfy my curiosity before I lose interest.

For better context, watch the short vid below on "new" cell chemistry before chiming in por favor....

- YouTube

Enjoy the videos and music that you love, upload original content and share it all with friends, family and the world on YouTube.

youtube.com

 

[brbr]

Does anyone with our CEF50 frame and big 720Wh battery know what type of 21700 cells that are being used?

SZZS and Linda are on holiday which is too long to satisfy my curiosity before I lose interest.

For better context, watch the short vid below on "new" cell chemistry before chiming in por favor....

- YouTube

Enjoy the videos and music that you love, upload original content and share it all with friends, family and the world on YouTube.

youtube.com

Apparently m58t

 

[TCFlowClyde]

Apparently m58t

Sorry is it an LG/Samsung/Panasonic and what amp/capacity?

The vid guy says the 21700 5.8 A cell yielding 16% more juice overall and is newer chemistry.

Yet, I see a Samsung 8.6A out there. Wondering how our new our 21700 cells battery would stack up (given same motor Voltage and battery configuration) and if it's a little hype on his end.

I know it's always risky asking this type of question, but someone has to be brave enough to ask the "dumb" questions...just for improved learning.

 

[brbr]

Sorry is it an LG/Samsung/Panasonic and what amp/capacity?
View attachment 125804

The vid guy says the 21700 5.8 A 21700 cell yielding 16% more juice overall and is newer chemistry.

Yet, I see a Samsung 8.6A out there. Wondering how our new our 21700 cells battery would stack up (given same motor Voltage and battery configuration) and if it's a little hype on his end.

I know it's always risky asking this type of question, but someone has to be brave enough to ask the "dumb" questions...just for improved learning.
View attachment 125803

** INR21700-M58T 5570mAh - 12.5A - CLEAR WRAP - 21700 & 20700 - Li-ion - Piles rechargeables | NKON

.

www.nkon.nl