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

[Ger@anio63]

 

[Adilka]

Hi! I tried offset bushings to fit CC DB kitsuma - but it doesn't fit the v1 frame.

 

[Ger@anio63]

Hi! I tried offset bushings to fit CC DB kitsuma - but it doesn't fit the v1 frame.

Penso che la camera d'aria sia troppo larga, i 2mm\1.5mm che ti dà offset non sono sufficienti, nella versione Cef 50 v2 o
v B come la chiama il produttore va anche senza offset della boccola

 

[Ger@anio63]

I think the air chamber is too wide, the 2mm\1.5mm it gives you offset is not enough, in the Cef 50 v2 or v B version as the manufacturer calls it also goes without bushing offset

 

[Ger@anio63]

Hi, while I'm waiting for the frame to be shipped, I'm checking where to buy the components I'm missing, I found this Fox x Performance 205x60 shock absorber with travel reducers, I could bring it to 50/52.5 by fitting offset bushings, I'd get to 209mm, what say, it could be fine, it costs €160 at a discount

 

[patdam]

Hi, while I'm waiting for the frame to be shipped, I'm checking where to buy the components I'm missing, I found this Fox x Performance 205x60 shock absorber with travel reducers, I could bring it to 50/52.5 by fitting offset bushings, I'd get to 209mm, what say, it could be fine, it costs €160 at a discount View attachment 146637

205 is length of trunion mount (not this pics) ?

 

[Ger@anio63]

205 is length of trunion mount (not this pics) ?

in the photo the eye-eye length is 205, I don't want them to put the wrong photo

 

[Ger@anio63]

in the photo the eye-eye length is 205, I don't want them to put the wrong photo

in the photo the eye-eye length is 205, I don't want them to put the wrong photo

 

[Ger@anio63]

205 is length of trunion mount (not this pics) ?

thanks for the news, I'll ask the shopkeeper

 

[Adilka]

I think the air chamber is too wide, the 2mm\1.5mm it gives you offset is not enough, in the Cef 50 v2 or v B version as the manufacturer calls it also goes without bushing offset

Yes, I've ended up exchange shocks with Yozha - he has a v2 frame

 

[calvintys]

B

Hi, while I'm waiting for the frame to be shipped, I'm checking where to buy the components I'm missing, I found this Fox x Performance 205x60 shock absorber with travel reducers, I could bring it to 50/52.5 by fitting offset bushings, I'd get to 209mm, what say, it could be fine, it costs €160 at a discount View attachment 146637

Bro 205 eye2eye it's totally impossible for u to install it on cef50 as I have fox float X2 in my garage not using almost 2 years. Why impossible it's because the mount design it's totally different from 210. Cef50 use eye2eye 210. Your picture it's 210 NOT 205 design.

 

[Ger@anio63]

Yes, I've ended up exchange shocks with Yozha - he has a v2 frame

Hi, what size is your frame?
the 170mm seat post fits well into the vertical tube have you had any problems?

 

[Ger@anio63]

B

Bro 205 eye2eye it's totally impossible for u to install it on cef50 as I have fox float X2 in my garage not using almost 2 years. Why impossible it's because the mount design it's totally different from 210. Cef50 use eye2eye 210. Your picture it's 210 NOT 205 design.

thanks for the information

 

[Ger@anio63]

this should be fine for the Cef 50 super discount €160 as the price is not bad

 

[Cazman]

First, thanks for all the massive info here I decided to jump on the DIY train. I've built up many bikes, but this will be the first ebike build. Just waiting on my frame to be delivered. They were nice enough to send me video of everything hooked up and working perfectly. Also got ports cut for cable routing because I'm not dealing with headset routing. That's a deal breaker for me.

 

[LAnton]

Only handmade.

 

[MrFixit]

Only handmade.

View attachment 146747 View attachment 146748

Lanton, Your batteries look excellent! I am interested in building my own batteries, my motor is the Bafang 43v m820. I currently have a 43v 11.4AH 410WH which I may have to repair or replace. Would you be willing to provide a list of equipment/supplies you used to make those batteries, as well as a ‘how to’ guide?
Thanks

 

[LAnton]

Lanton, Your batteries look excellent! I am interested in building my own batteries, my motor is the Bafang 43v m820. I currently have a 43v 11.4AH 410WH which I may have to repair or replace. Would you be willing to provide a list of equipment/supplies you used to make those batteries, as well as a ‘how to’ guide?
Thanks

If you read all 150 pages of this story. You will become a true professional in the construction of CEf50. I can advise you to make a 48V battery. Your engine will become a little more powerful. You will completely drain the battery. With Smart BMS, you can control the battery capacity and voltage.

 

[Adilka]

Hi, what size is your frame?
the 170mm seat post fits well into the vertical tube have you had any problems?

L size, yes 170 mm AXS fitted perfectly

 

[Thomas39]

Ciao a tutti, questo non è il posto giusto per postare la domanda ma volevo chiedere se qualcuno conosce un frame vpp per m820

 

[Yozha]

Only handmade.

View attachment 146747 View attachment 146748

I join the request above. Tell, what characteristics of batteries you got, please? And please share the wiring diagram and drawings/dimensions of the frame.

 

[souftosouf]

Now you can install a 170mm long dropper on a frame with a size of M

I wish i have listened to you

Guys i have an issue with my m820. It does a strange noise on my right cranck when i'm at ~70°. Only when the motor is powered on

Other issue : I have some vibrations at very low cadence but high torque. Is it normal ?

Other issue : I was on a hill, and my motor started to make a LOT of noise (Low cadence, high torque). It was the first and only time i heard it. What caused it ?

 

[LAnton]

L size, yes 170 mm AXS fitted perfectly

Frame size M. A 175mm long Magura Vyron MDS-V pin.3. There were no problems under my height of 175mm, he entered to the end. I had to remove the bolts to secure the charger. The biggest problem is with MAgura. The quality is very poor. The lid on the manette immediately broke, I had to tape it up. The pin is made of thin iron. When I tighten the frame more than 2H, the pin stops moving out normally.

 

[LAnton]

5A and 10A batteries on DMEG 21700 cells. I don't have any diagrams. 1st layer of shrink wrap. The second layer is 0.5mm carbon fiber, handmade. The 3rd layer is heat shrink. Check out the messages earlier I posted photos of batteries.

 

[voigtkampff]

I just noticed one of the gaskets in the suspension hinge has broken. These gaskets are made of aluminium and seem to be very fragile. I was very careful not to overtorque them when assembling the bike so I used calibrated torque wrench set to 12Nm. Seems like the material fatigue. Thankfully, there are 2 spare gaskets in the kit from SZZT. Anyway, just to remind you, be very careful with those aluminium gaskets and better order several spares just in case, to have uninterrupted fun.

 

[TCFlowClyde]

I just noticed one of the gaskets in the suspension hinge has broken. These gaskets are made of aluminium and seem to be very fragile. I was very careful not to overtorque them when assembling the bike so I used calibrated torque wrench set to 12Nm. Seems like the material fatigue. Thankfully, there are 2 spare gaskets in the kit from SZZT. Anyway, just to remind you, be very careful with those aluminium gaskets and better order several spares just in case, to have uninterrupted fun.

View attachment 146906
View attachment 146907
View attachment 146908

Yep, I didn't like 'em...junk! Especially as a heavier rider.

Probably can find a local machinist in your area to make aluminum mating bolt. The OEM thrubolt (pin) is good, which is most of the cost.

Likely get high-grade 7075 Al for $20-25 per X 6 = $120-150. Maybe half that much with 6061 Al, so $60-80 instead?

Bonus...never lose the beveled washer which is hard to replace.

 

[Ger@anio63]

Hi, I found this cable which unlocks the speed limit and changes the diameter of the wheel. I asked if it is compatible with the M820 motor.
They replied yes. I don't understand anything about electronics. Surely in the forum some expert is giving an opinion on the object.
BAFANG BESST linea di programmazione limite di velocità rilascio diametro ruota impostazione M600 M510 protocollo CAN motore linea di programmazione dedicata - AliExpress 18

 

[mike_kelly]

I don't think that will work. It is a serial cable. I think the only thing that works is a bluetooth connection to a handlebar device like the 245v3.

 

[Ger@anio63]

This is the answer to the question of compatibility

The M820 can be used, but the DPC245 does not have a USB plug,
so you need to plug the USB into a computer or charger for 5V power

 

[mike_kelly]

The M820 is not a serial motor. It is canbus and the old serial devices will not work.