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

[Tilt]

on the forum lc930 lightcarbon 16kg800 well done to him

 

[spokémon]

Yap at the moment coil shock may not work but linda told me they are redesign it to make it work on coil. Sorry typing error, i am getting 210x55 not 200.

if you run 29" on the rear with 210x55, remember to check clearance on full compression. I don't remember hearing anyone running this combo.

 

[calvintys]

Good news guys .... End of oct Linda its coming out Carbon crank. Price n weight will be available soon

 

[patdam]

Good news guys .... End of oct Linda its coming out Carbon crank. Price n weight will be available soon

crank arms or motor guard ?

 

[calvintys]

BOTH

 

[brbr]

that's great!

 

[kimochi]

hi, I have a question, are official bafang batteries reliable and have lower risk of catching fire, exploding up my as..? this is my first time doing diy ebike and can't shake that image off my mind. i don't plan on building my own battery but using the 410wh one.

 

[mike_kelly]

hi, I have a question, are official bafang batteries reliable and have lower risk of catching fire, exploding up my as..? this is my first time doing diy ebike and can't shake that image off my mind. i don't plan on building my own battery but using the 410wh one.

Nobody knows.

 

[petkevich]

Here's a video I made showing a detailed view and build of the CEF50 frame and M820 motor. Once I get a few more rides in, I'll be creating a detailed review of both the frame and motor.

Can I get your build spec? I just finished mine and want to compare on weight and costing

 

[forsa355]

Can I get your build spec? I just finished mine and want to compare on weight and costing

look at the description of this video... I have most of the components linked there. Other than those, I used a Rockshox Yari 160mm fork, Fox float shock, deity saddle, and Chromag ranger shorty stem. Could be a lot lighter with better compents and a smaller battery (I have the 720 battery)

 

[petkevich]

Here's a video I made showing a detailed view and build of the CEF50 frame and M820 motor. Once I get a few more rides in, I'll be creating a detailed review of both the frame and motor.

Can I get your build spec? I just finished mine and want to compare on weight and costing

 

[petkevich]

My m820 CEF 50 size L build 720w battery. Fox 36, Rhythm Fox float X (new from Levo takeoff). Lightcarbon carbon enduro wheels 29/27.5 with DT Swiss hubs, SRAM Code R brakes with 203mm rotors(new takeoffs), SRAM AXS GX, 11 speed SRAM GX cassette, Nukeproof carbon bar, 200m TranzX dropper. Scwalbe Eddy Current rear and Spez Butcher Grid Gravity front tires setup tubeless. 22kg final weight, target was 20kg

1st ride notes:
17miles, 2k climbing with 71% battery left.

Fox suspension is awesome. Plows thru the chunky gnar like hot butter and on my typical jumps feels great. Feels lighter than my levo, more flickable. Love the low seat tube height as I can really slam the seat on the steeps. Geometry feels similar to my levo.

Negatives, motor whines under load big time, have to have high cadence or it's not going anywhere on the steeps, rode in S+ equal to 4 and had to hit boost on super steeps. I went for 11 speed on this build for a beefier chain then a 12 speed chain as I never used over 10 in other bikes but with this "light" motor you will use the 12th gear. There is a clunk in the motor on downhills. Probably similar to ep8? There is no kick when you engage like Bosch or brose. Think the tuning is for a commuter bike. Need to see if we can play with it. I did my normal test track and I had to use alot more legs to do it. On the tarmac it's fine, that's why I think it's tuned for commuter riding.

Carbon rims and dt Swiss hubs are epic. Rolls fast. Sram code r brakes are good but need to re step up. AXS shifting different then cable shifters dynamics, need to re learn as I'm not smooth yet.

Net net, super fun pointed downhill, more work going up with wrong tuning on motor for technical eMTBing.

 

[spokémon]

My m820 CEF 50 size L build 720w battery. Fox 36, Rhythm Fox float X (new from Levo takeoff). Lightcarbon carbon enduro wheels 29/27.5 with DT Swiss hubs, SRAM Code R brakes with 203mm rotors(new takeoffs), SRAM AXS GX, 11 speed SRAM GX cassette, Nukeproof carbon bar, 200m TranzX dropper. Scwalbe Eddy Current rear and Spez Butcher Grid Gravity front tires setup tubeless. 22kg final weight, target was 20kg

1st ride notes:
17miles, 2k climbing with 71% battery left.

Fox suspension is awesome. Plows thru the chunky gnar like hot butter and on my typical jumps feels great. Feels lighter than my levo, more flickable. Love the low seat tube height as I can really slam the seat on the steeps. Geometry feels similar to my levo.

Negatives, motor whines under load big time, have to have high cadence or it's not going anywhere on the steeps, rode in S+ equal to 4 and had to hit boost on super steeps. I went for 11 speed on this build for a beefier chain then a 12 speed chain as I never used over 10 in other bikes but with this "light" motor you will use the 12th gear. There is a clunk in the motor on downhills. Probably similar to ep8? There is no kick when you engage like Bosch or brose. Think the tuning is for a commuter bike. Need to see if we can play with it. I did my normal test track and I had to use alot more legs to do it. On the tarmac it's fine, that's why I think it's tuned for commuter riding.

Carbon rims and dt Swiss hubs are epic. Rolls fast. Sram code r brakes are good but need to re step up. AXS shifting different then cable shifters dynamics, need to re learn as I'm not smooth yet.

Net net, super fun pointed downhill, more work going up with wrong tuning on motor for technical eMTBing.

View attachment 124916 View attachment 124917

Do you have Bafang GO+ app to tune your motor? or BESST tool?

 

[petkevich]

Do you have Bafang GO+ app to tune your motor? or BESST tool?

both, Bafang go is only good to update firmware, no motor control panel. I have CAN BESST tool but do I need a login for Shaozheng as the OEM bike vendor?

 

[spokémon]

both, Bafang go is only good to update firmware, no motor control panel. I have CAN BESST tool but do I need a login for Shaozheng as the OEM bike vendor?

Bafang GO is useless. You need Bafang GO+ app. But it currently only works with DP C245 v3 (MUST be v3)
This will allow you to tune your motor. It wont set wheel size and max speed. You can look at the screenshots on the app-stores

I don't have BESST, so I can't help.

 

[petkevich]

Bafang GO is useless. You need Bafang GO+ app. But it currently only works with DP C245 v3 (MUST be v3)
This will allow you to tune your motor. It wont set wheel size and max speed. You can look at the screenshots on the app-stores

I don't have BESST, so I can't help.

Let me download it and try. Tha is for the help

 

[patdam]

My m820 CEF 50 size L build 720w battery. Fox 36, Rhythm Fox float X (new from Levo takeoff). Lightcarbon carbon enduro wheels 29/27.5 with DT Swiss hubs, SRAM Code R brakes with 203mm rotors(new takeoffs), SRAM AXS GX, 11 speed SRAM GX cassette, Nukeproof carbon bar, 200m TranzX dropper. Scwalbe Eddy Current rear and Spez Butcher Grid Gravity front tires setup tubeless. 22kg final weight, target was 20kg

1st ride notes:
17miles, 2k climbing with 71% battery left.

Fox suspension is awesome. Plows thru the chunky gnar like hot butter and on my typical jumps feels great. Feels lighter than my levo, more flickable. Love the low seat tube height as I can really slam the seat on the steeps. Geometry feels similar to my levo.

Negatives, motor whines under load big time, have to have high cadence or it's not going anywhere on the steeps, rode in S+ equal to 4 and had to hit boost on super steeps. I went for 11 speed on this build for a beefier chain then a 12 speed chain as I never used over 10 in other bikes but with this "light" motor you will use the 12th gear. There is a clunk in the motor on downhills. Probably similar to ep8? There is no kick when you engage like Bosch or brose. Think the tuning is for a commuter bike. Need to see if we can play with it. I did my normal test track and I had to use alot more legs to do it. On the tarmac it's fine, that's why I think it's tuned for commuter riding.

Carbon rims and dt Swiss hubs are epic. Rolls fast. Sram code r brakes are good but need to re step up. AXS shifting different then cable shifters dynamics, need to re learn as I'm not smooth yet.

Net net, super fun pointed downhill, more work going up with wrong tuning on motor for technical eMTBing.

View attachment 124916 View attachment 124917

how you do to make functioning AXS with 11 speed cassette ? i tried and never can.

 

[Myalteregohamish]

Nobody knows.

Also none of us have caught fire either.

 

[petkevich]

how you do to make functioning AXS with 11 speed cassette ? i tried and never can.

Use the upper Limit screw on the biggest cassette cog. Never goes over and if you over shift it's a no op.

 

[petkevich]

Anyone know how to get the m820 cranks off? They aren't coming off. Need to remove the motor to check the wiring connections, getting error 21, speed sensor error

 

[mike_kelly]

Anyone know how to get the m820 cranks off? They aren't coming off. Need to remove the motor to check the wiring connections, getting error 21, speed sensor error

Did the sensor rotate around the fixing screw causing it to miss the magnet?

 

[petkevich]

Did the sensor rotate around the fixing screw causing it to miss the magnet?

Nope, the speed sensor cable came out of the motor. It was my 2nd ride and was in the absolute middle of nowhere and had to pedal out with no motor. Good news is it pedals great, no drag and wasn't that bad. Purchased a crank arm puller at REI. All is well.

 

[brbr]

Nope, the speed sensor cable came out of the motor. It was my 2nd ride and was in the absolute middle of nowhere and had to pedal out with no motor. Good news is it pedals great, no drag and wasn't that bad. Purchased a crank arm puller at REI. All is well.

I was able to remove the crank arm without the proper tool by removing the screw and pedaling hard. I did few wheelies, the cranck arm just came out easily !

 

[Pinkee]

My m820 CEF 50 size L build 720w battery. Fox 36, Rhythm Fox float X (new from Levo takeoff). Lightcarbon carbon enduro wheels 29/27.5 with DT Swiss hubs, SRAM Code R brakes with 203mm rotors(new takeoffs), SRAM AXS GX, 11 speed SRAM GX cassette, Nukeproof carbon bar, 200m TranzX dropper. Scwalbe Eddy Current rear and Spez Butcher Grid Gravity front tires setup tubeless. 22kg final weight, target was 20kg

1st ride notes:
17miles, 2k climbing with 71% battery left.

Fox suspension is awesome. Plows thru the chunky gnar like hot butter and on my typical jumps feels great. Feels lighter than my levo, more flickable. Love the low seat tube height as I can really slam the seat on the steeps. Geometry feels similar to my levo.

Negatives, motor whines under load big time, have to have high cadence or it's not going anywhere on the steeps, rode in S+ equal to 4 and had to hit boost on super steeps. I went for 11 speed on this build for a beefier chain then a 12 speed chain as I never used over 10 in other bikes but with this "light" motor you will use the 12th gear. There is a clunk in the motor on downhills. Probably similar to ep8? There is no kick when you engage like Bosch or brose. Think the tuning is for a commuter bike. Need to see if we can play with it. I did my normal test track and I had to use alot more legs to do it. On the tarmac it's fine, that's why I think it's tuned for commuter riding.

Carbon rims and dt Swiss hubs are epic. Rolls fast. Sram code r brakes are good but need to re step up. AXS shifting different then cable shifters dynamics, need to re learn as I'm not smooth yet.

Net net, super fun pointed downhill, more work going up with wrong tuning on motor for technical eMTBing.

View attachment 124916 View attachment 124917

Keen to hear more about the rims. About to pull the trigger on Jim's rims but haven't found anybody else that has bought them.


Which spec did you get? (Rim and spoke type).

 

[calvintys]

Keen to hear more about the rims. About to pull the trigger on Jim's rims but haven't found anybody else that has bought them.


Which spec did you get? (Rim and spoke type).

Base on my experience any Chinese carbon rim will stronger then any branded alloy wheel. I try before hammer a branded alloy rim n its dent so easily without much afford BUT cheap carbon rim, u need to hit it hard in order to crack it.

 

[petkevich]

Keen to hear more about the rims. About to pull the trigger on Jim's rims but haven't found anybody else that has bought them.


Which spec did you get? (Rim and spoke type).

Here is the details from light carbon wheels

 

[petkevich]

Here is the details from light carbon wheels

View attachment 124998

The weight was over by 200g but other than that awesome wheels

 

[mike_kelly]

I have built 4 sets of wheels by this vendor. Very happy with the product and service. You must specify the number of holes or you will get 28h by default.

MTB 27.5ER Carbon Rim Hookless 40mm Width Cycling Mountain Bike 29ER Carbon Rims | eBay

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www.ebay.com

 

[mike_kelly]

Also none of us have caught fire either.

Nobody is using a Bafang battery yet...

 

[kaylee.s]

Nobody is using a Bafang battery yet...

I received mine Friday for my lce930. Weighs 2704g. Installed the battery and took the bike for a short test ride around the block yesterday. Hope to get a longer test ride in today! Ohh, and I didn't burst into flames.