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

[voigtkampff]

That sucks, not sure how you might remove them, Maybe a drill is you best bet. I snapped one of the shock bolts trying to torque to spec, I found the bolts are quite weak but when speaking to Jean they said they would make them stronger for future. I now use these TI bolts from Ali and they have been great so far.
You need a 33mm and. 38mm

AU$8.40 5%OFF | M6x1 Middle Nut Length 18-75mm Ti/Golden/Rainbow GR5 Titanium Bolts & Rod Nut For Bike Rear Suspension

4.44￡ 5% OFF|Titanium Rainbow Bolts Bike | Bolt Nut Titanium | Titanium M6 Bolt Gr5 - M6x33mm - Aliexpress

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a.aliexpress.com

Are you sure this bolt from the link has right diameter? Cuz the shock mounting hardware has 8mm internal diameter, so I guess this should be M8 bolt rather than M6? Or maybe the screw ID is M6 and OD of the sleeve is M8?

 

[voigtkampff]

Interesting development regarding OEM ICR headset creaking. At some point I started noticing the gap between headset top cap and the bearing cup underneath it is skewed, ie. wider at back than at front. After putting some thoughts into this I came to the conclusion this is probably caused by the stem with split clamp flexing under the force of preload screw, which needs to be tighten unusually strong on this headset to remove play. At this point I was using stem like in the pic below.

After trying out stem with solid clamp like below, the gap is now even and the creaking is gone. I haven't had a chance to put this under heavy stress yet, but it seems resonable to assume that skewed top cap was putting uneven force on the split cone and the bearing underneath, resulting in creaking noises when turning handlebar left/right due to cone and bearing seating.

The stem I tested it with is a temporary solution, I ordered green Deity Copperhead which also uses solid clamp. I guess the problem isn't really related to the stem material (softness of it), the same stem would work fine if the headset didn't require so much preload force. Anyway, solid clamp seems to fix it.

 

[un..inc]

Maybe some of you followed my build-thread, maybe some didn't - so I'll post some first pictures here as well...

[BUILD] CEF50 Custom (former budget) Build

Hi there... As I'm getting older and have less time for mountain biking due to family, voluntary work and my job, some time ago I felt the need for electric assistance so that I wouldn't be knocked out three days later after an afternoon on the bike with my mates... However, I don't want to roll...

www.emtbforums.com

 

[borysgo2]

Interesting development regarding OEM ICR headset creaking. At some point I started noticing the gap between headset top cap and the bearing cup underneath it is skewed, ie. wider at back than at front. After putting some thoughts into this I came to the conclusion this is probably caused by the stem with split clamp flexing under the force of preload screw, which needs to be tighten unusually strong on this headset to remove play. At this point I was using stem like in the pic below.

View attachment 141154

After trying out stem with solid clamp like below, the gap is now even and the creaking is gone. I haven't had a chance to put this under heavy stress yet, but it seems resonable to assume that skewed top cap was putting uneven force on the split cone and the bearing underneath, resulting in creaking noises when turning handlebar left/right due to cone and bearing seating.

View attachment 141155

The stem I tested it with is a temporary solution, I ordered green Deity Copperhead which also uses solid clamp. I guess the problem isn't really related to the stem material (softness of it), the same stem would work fine if the headset didn't require so much preload force. Anyway, solid clamp seems to fix it.

Did the solid stem sort the problem with headset?

 

[voigtkampff]

Did the solid stem sort the problem with headset?

I can't say it's completely solved but the creaking happens much less frequently now and I don't feel headset knocking on the handlebar. There's still a bit of creaking which seems to be caused by uneven pressing of top bearing cup (left is ~0.3mm higher than right) but front-back skew of headset cover was fixed.

 

[TCFlowClyde]

I can't say it's completely solved but the creaking happens much less frequently now and I don't feel headset knocking on the handlebar. There's still a bit of creaking which seems to be caused by uneven pressing of top bearing cup (left is ~0.3mm higher than right) but front-back skew of headset cover was fixed.

Perfect match for your set up. Will make that awesome sparkle green pop IMHO

 

[voigtkampff]

Perfect match for your set up. Will make that awesome sparkle green pop IMHO
View attachment 141508 View attachment 141509 View attachment 141510

already have this one… but i don’t want to take break from riding to work on this now, enjoying good weather

 

[TCFlowClyde]

already have this one… but i don’t want to take break from riding to work on this now, enjoying good weather

View attachment 141517

Yep. Smart

 

[ymmr32]

Hello. I want a carbon crank, but should I buy the one for BOSTH gen4? I also have a carbon crank from SZZS, but I've given up on it because it's making strange noises and feeling rough around the edges. I don't know when they'll be re-produced. Can someone tell me? Thank you.

 

[ficorama]

CEF50 for sale.
@TCFlowClyde I hope I can place an ad?
selling my cef 50. xl frame size, m820 motor and if you need a diy battery. kit comes with: complete frame. new front triangle that needs to be painted, engine, headset, thru axle. hanger and battery if needed. delivery possible in the territory of the European Union. everything else via messages.

if necessary, I have parts to assemble the whole bike.
Thanks

 

[Yozha]

Hi everybody. My frame is on its way and I can't wait. Help me to solve one question... Jean says to use a 22x8mm shock bushing, but the frame diagram says 22.2x8mm. I will be using a rear shock RockShox Super Deluxe Select+. Which bushings should I order after all? Share your experience!

 

[Yozha]

And immediately the question about the suitable shape for my shock, I found two options for the size, but I don’t understand which is correct for this frame (for RockShox Super Deluxe Select+):
1:

RockShox Bushings for Struts 8 mm metric/imperial

These RockShox bushings with 8 mm diameter are used to mount your RockShox shock, regardless of whether it has a measurement in millimetres or inches. Compatibility: RockShox shock with 1/2" (12.7 mm) shock eyelet Manufacturer Numbers: 14.0 mm: 11.4

www.bike-components.de

2:

https://aliexpress.ru/item/1005004586080437.html?spm=a2g2w.orderdetail.0.0.62e74aa60iqGnK&sku_id=12000029728091335

?

 

[voigtkampff]

Hi everybody. My frame is on its way and I can't wait. Help me to solve one question... Jean says to use a 22x8mm shock bushing, but the frame diagram says 22.2x8mm. I will be using a rear shock RockShox Super Deluxe Select+. Which bushings should I order after all? Share your experience!

I used 22.2x8 (with RS Super Deluxe Ultimate). It's not easy to push them in but it's doable with a bit of grease and wit.

These are the ones I used 0.79￡ 83% OFF|Mountain Bike Rear Shock Absorber Bushings, Rear Wheel Shock Absorber| | - AliExpress . The 2. option you list requires you to replace the DU sleeve originally mounted in the shock which I didn't want to do without a good reason (and I don't think there's 22.2mm option available).

 

[masahirov]

Hi everybody. My frame is on its way and I can't wait. Help me to solve one question... Jean says to use a 22x8mm shock bushing, but the frame diagram says 22.2x8mm. I will be using a rear shock RockShox Super Deluxe Select+. Which bushings should I order after all? Share your experience!

Good evening, Yozha. I use a genuine RockShox 22.2x8. (DELUXE SELECT+) Tools are required to attach the mounting hardware to the shock. The installation on the bike is quite tight, but it works smoothly without any problems.

 

[LAnton]

CEF50 v3.0 with removable battery. Frame weight 3050g The frame holds two 48V 10A batteries on 21700 cells.

 

[LAnton]

The DPE171C connects to go+. 3 levels assists

 

[patdam]

CEF50 v3.0 with removable battery. Frame weight 3050g The frame holds two 48V 10A batteries on 21700 cells.

View attachment 142162 View attachment 142163 View attachment 142164

what whould you mean by "The frame holds two 48V 10A batteries on 21700 cells". you have 2 10A battery inside the frame (960 Wh) ? you can use with only one if you want ?

 

[LAnton]

what whould you mean by "The frame holds two 48V 10A batteries on 21700 cells". you have 2 10A battery inside the frame (960 Wh) ? you The frame holds 2 batteries of 10A 48V (960W). This is for long-distance trips. For short trips, I will install 1 480W battery. I also plan to make two 5a batteries for a bike park without a lift in order to ride a lighter bike. I can change it at the bottom of the track to a charged 5A battery.

 

[LAnton]

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

 

[patdam]

Sorry lanton it's not clear for me. SZZS provide 2 batteries inside the frame and you can use the bike with only 1 (great improvement) ? or you will doing that yourself ? does they provide cover to close the battery hole ?

about DPE171; i use it on my 1075 on the handelbar, more efficient

 

[LAnton]

Sorry lanton it's not clear for me. SZZS provide 2 batteries inside the frame and you can use the bike with only 1 (great improvement) ? or you will doing that yourself ? does they provide cover to close the battery hole ?

about DPE171; i use it on my 1075 on the handelbar, more efficient View attachment 142171 View attachment 142172

There are 2 batteries installed in the frame. But I connect one to 10a. The cover will be printed on a 3D printer. Here is an example photo on the CEF49 frame

 

[92se-r]

Whoa didnt know they had a V3. Cool stuff.

 

[TCFlowClyde]

There are 2 batteries installed in the frame. But I connect one to 10a. The cover will be printed on a 3D printer. Here is an example photo on the CEF49 frame

View attachment 142176

Nice job.

 

[92se-r]

On the V2 and V3 cef50, is anyone actually running a coil? Im finding the suspension dynamics not great to run a coil. On my air shock fox float x im finding the linkage ratio too regressive where im having to lower the air chamber volume because it blows thru the travel too much. I find it hard to believe you could run a coil without having to run way too high of a spring rate.

 

[voigtkampff]

There are 2 batteries installed in the frame. But I connect one to 10a. The cover will be printed on a 3D printer. Here is an example photo on the CEF49 frame

View attachment 142176

Replacable batteries in cef50 are game changer for me. I will consider ordering V3 with non-ICR headset to replace my current one (or just a front triangle without hardware if it matches). But I don't quite understand what I see here, on pics with grey frame the battery opening is from the top, here on orange one it's on the bottom. Is this battery hole DIYed into v2, please explain? Is SZZT going to offer replaceable battery cases to match the opening in the frame, allowing to install 2x10Ah?

 

[LAnton]

I made a hole in the frame myself and reinforced the lower pipe with carbon fiber. The weight increased by 400g. If we all ask Jean to make a factory hole in the frame and strengthen the lower pipe with carbon fiber. Then version 3.0 will be released with a removable battery. Imagine that you can install a choice of 5, 10, 15 or 20A 48V battery in the bottom pipe. Grey CEF50 frame. Orange frame CEF49

 

[92se-r]

I made a hole in the frame myself and reinforced the lower pipe with carbon fiber. The weight increased by 400g. If we all ask Jean to make a factory hole in the frame and strengthen the lower pipe with carbon fiber. Then version 3.0 will be released with a removable battery. Imagine that you can install a choice of 5, 10, 15 or 20A 48V battery in the bottom pipe. Grey CEF50 frame. Orange frame CEF49

Holy crap. Lol. Got any pics of the reinforcement? Did you have to recure the reinforcement? How are you bonding this?

 

[LAnton]

Holy crap. Lol. Got any pics of the reinforcement? Did you have to recure the reinforcement? How are you bonding this?

For what purpose are you interested? If you have never worked with carbon fiber and repaired frames. Then it's better not to do it.

 

[92se-r]

For what purpose are you interested? If you have never worked with carbon fiber and repaired frames. Then it's better not to do it.

Curiosity. I peripherally work with composites at work but it is another groups responsibility. My previous bike had a removable battery and I never once took it off, so dont really see a need for my personal use.

 

[TCFlowClyde]

Curiosity. I peripherally work with composites at work but it is another groups responsibility. My previous bike had a removable battery and I never once took it off, so dont really see a need for my personal use.

I'm ok with the 720 Wh too....less weight for the motor drop frame. Soon I'll plan the extender mount for camping, but really haven't needed a larger one for me under 2.5 hrs of riding..