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I have build several sets of wheels using koozer hubs (mostly 450 and 455) they do not have easy life with me. They proven to be very good. Highly recomended. Regards

Rear end in CEF69 is not stiff at all. There is a good bit of the flex at the back stays. Hope new seatstay with bridge will be developed soon. That would be great improvement.

M820 - i think it is more efficient at lower powers (up to sport mode), let me say You would like to some very long mountain tours. There is more clunk noise coming from it. It is lighter to ride with drained battery. There is a nice fake taxi FW for it. M510 FC4.0 - very smooth, nice to ride...

Yes, only 337 from the ground to the motor axle. I think this is the first iteration of the linkage. I got the frame around September 2025. Cheers

Yes 29'' both wheels.

With 2.6" front and 2.5" rear tires BB is at 337mm. Cheers

Recorded some short video, so You can check the motor noise. https://www.instagram.com/reel/DXmmUAPCJlj/?igsh=MTNwYzBvZnNpa2Z1Zw==

Going downhill motor is extremely quiet! IMHO it is due to tighter tolerances. Done a few kilometers today and only one used boost mode. Do I need more power ? I do not think so. I can always ramp up current limit and give it a try.

Weekend is coming and what a disaster I can not to ride two bikes at the same time :D

In order to solve ''not turning on 2nd time M820'' problem I have tried changing display, on/off switch and controller board from the motor itself. Somehow data is transferred/synced when You connect 1 new component. One of the forum members had exactly the same problem and mentioned that...

Had the same with M820 motor. IMHO some kind of firmware issue. Had to reconnect the power every time to ride the bike. Solution is simple. You have to ride the bike and drain the battery completely to 0% until the PAS is gone. Than leave the bike to turn off. Next day charge the bike and it...

I got the motor with frame from SZZS maybe ill ask for 16A FW. But just in case my plan does not work I will need the stock firmware to have some kind of come back :D The sensor: - old - simple single magnet sensor - new - hall sensor with multi hole disc + some magic box Now the question is...

Thanks I am 183cm tall, about 100kG kitted, inseam about 86cm. In L - frame You can slam 210mm oneup dropper post all the way in, but it ends up around charging port. I got L frame and it is just about right size for me, but was considering to get M. If You get M size frame, You can always...

My battery percentage is controlled via BBR V2 device, so is motor FW independent. Below my sw Just wondering if I can upload 4816 RS firmware to it and run the motor on standard sensor? Does anyone have RS firmware ?

I have prepared small DC-DC converters boards to run 25W me2000 LED lights. I can not live without anymore. Automatic mode can run either from bafang display or from headlight itself. No more worries about getting dark. Light is always on handlebar and always ready to go.

During the week I'll connect besst to it to check the settings, I will prapobly tune only ECO mode a bit. My fc4.0 firmware is xxxx4814xxxxx which is about right. I have single 🧲 speed sensor. I Feel that m510 efficiency is much lower than m820. If I can compare those two motors with the same...

EDIT: Forgotten to mention, from about 15% of the battery left, power is limited to about 350W.

Hi to all :D Long story short, got the CEF69 build last week. FORK: RS ZEB BASE 170MM (BUTTER CUP AIR SHAFT) SHOCK: RS SELECT 205X65 BRAKES: SHIGURA BRAKE ROTORS: IIPRO 203mm-front and 180mm rear WHEELS: DT Swiss rims (models as on the photos), Sapim race spokes, brass niples and KOOZER 455...

It sounds like a small disaster. What is the way of getting a bit more power out of m510 motor? - 1 cell up + BBR - some special firmware ? - Max current limit change ? Thanks

Had cef50 with bomber CR, very happy with it. https://www.emtbforums.com/threads/green-mamba-cef50-900wh.42439/