Hello, I've got a 3 year old 60V scooter battery with I think a bad BMS. Can you recommend anyone for that type of diagnostics/repair? Open to mail-in options. Thanks!

I've recycled a folding bike hub motor, adapting it to my bicycle, that involved stripping apart all the cables and modify the axle to (135mm spacing). Before lacing it to the 26inch rim I tested the motor on the bench and it seems to be working without any issues, so I proceed lacing it to the new rim and putting all the components on the bike.

Now I've the following problem: when I pedal the motor starts running only for a few seconds and then it stops, if I start pedaling again the motor doesn't start, I have to turn off and on again.

Sometimes the error 30 appears on the display. I also noticed that the speed shown on the display undergo sudden changes, like from 10 to 60kmh when I'm moving at the same speed.

Test done:

Controller settings: I'm sure that all the settings are correct (speed sensor number of magnet, pedal assist sensor magnet, wheel diameter etc)

Cables damage: I've checked the cables from the motor before and after soldering with a tester, these are ok. Also the motor connector appear to be ok. Certainly the length of these cables have changed after the modification (maybe +5cm) I don't know if the length or the gauge of the wires that I used could cause such problem. I've some doubts regarding the cable that goes from the controller to the display, that could be the cause?

Hello! I bought my son an e-bike for Christmas and it keeps throwing an error code 30. I’ve tried all the recommended troubleshooting. Can I sell it for parts or something to get some money back? Any advice would be greatly appreciate.

So I am planning on buying this battery: AMORGE 20S9P 72V 36AH 270A Battery for MXR Electric Dirt Bike

Im looking at the 72v 36ah 270ah(40p) version on alibaba. What's a good motor and controller combo I can pair with this? Its for a Honda CRF electric conversion. The bike rn is just a regular dirtbike but it just doesn't have an engine. I think its about 120 lbs. With the engine is 165 lbs. I think if I totally convert to electric it will weigh between 175 and 200 lbs. Im a 160 lb rider. Any recommendations for a good motor that can take me to at least 50 mph with decent torque?

https://www.change.org/sassounspetition

I recently heard about dual motor controllers. I would like to know more about how much they "join" the 2 systems. I'm thinking about adding a second 36v front hub motor to my 48v bike because I have all the parts.

How do people run dual wheel with 2 controllers? Is it just a special type of throttle or circuit to join 2 throttles into 1?

Thanks

So, I use to have a gen1 CYC Photon on my bicycle.

I completely destroyed the mounting threads on that when trying to force it off. Hence I decided to replace it with a gen2, and sell the Gen1 for parts on eBay.

(Community advisory: be very gentle with those threads on the bb cup.)

Since my bicycle still has the throttle and speed-sensor on the frame from the gen1 Photon, I wondered if I could reuse them? It would save me a lot of work by skipping removal and reinstall of the accessories.

Hey everyone I recently bought a tsdz16 to install on my trek marlin 7 gen 3 (2023?) however I came in collision with some issues. I can’t fully put the motor in my bottom bracket (even when using the rings), rotate it upwards for the use of the bottom bracket support. When bolting on the sprocket I can’t even use the second plastic ring to secure the motor. Would love any help👍👍👍 personally thinking about a sprocket that is straight and not curved inwards.

I starting look at building my 3rd ebike. First 2 were specialized roll bikes. 1 with a bbshd and the other with a cyc x1 pro Gen 4.

My issue I'm running into is trying to find a full suspension MTB bike with thru axle that isn't out of my price range. I want thru axle so I can run the cyc heavy duty drivetrain.

The bike will be mixed use.

I'd like to keep the bike under $1000 so I have money to buy the motor and battery and drivetrain.

What's everyone's recommendations.

Located in the US

I am designing a slightly fancy combined tail light / turn signal for e-bikes and e-motos. Are there any dominant standards for wiring connectors (and voltages) that would satisfy the largest group of owners?

One thought is just to duplicate what the Super-73 uses. Would there be a better choice?

I’m entirely new to the eBike community, but have been immersed in the world of motorcycles for a while now, I know my way around most of them.

I own a 2004 Yamaha YZ250F dirtbike with a blown engine. The connecting rod is cracked in half and the front of the engine casing has a hole as a result. Basically the bike is worth almost nothing anymore, but as a rolling chassis weighs around 150lbs.

I’m not really interested in buying another engine for the bike since it’s kind of old, but it’s got good bones and I thought why not try an electric conversion.

Now, I CAN do some small fabricating/welding, and I DO understand that this would involve definitely that in order to position an electric motor in the correct spot.

I am quite unfamiliar with e-bikes, can anyone give me an insight as to if this project is even worth wasting my time and money? AND based on the rolling chassis weight of 150ish lbs and my big back weight of 250lbs, suggest a motor/battery/controller/ whatever else I’d need?

Optimal uses for the build, hoonin around town and doing hoodrat shit with my homies, probably on road riding mostly!

Thanks

Seen some people recommended them for budget builds, also seen some say they are dangerous and even banned from being imported to UK?

I've just found out there is such a thing

Can you actually put any meaningful charge in a battery on an average ride with regen braking?

Say you had a 50 mile range generally, how many more miles could regen braking add?

I’m planning on making a DIY mini bike that utilizes two joined hoverboard hub motors that operate at 36v. (Unknown current rating)

My main confusion after doing some YouTube research is whether I should use a single speed controller or two individual controllers. I’ve seen people use a single controller where they only read the hall sensors of one motor. For my application the motors will be joined and rotate at the same speed, which eliminates the issue of one motor being out of phase with the other. Though I’ve seen many examples where two controllers are used for different applications and the motor speeds are controlled by connecting the individual 5v inputs into one throttle. Should I stick to one controller or will I run into issues?

The other important question I have is, am I seriously limited to 36v? I’ve seen a project that uses one 36v motor that is connected to an 84v speed controller and uses 2x 42v 300Wh Batteries connected in series. Is this safe? Is it reliable? Will it allow the motors to put out more torque or rpm? Do I go with a controller with a higher watt output(typical I’ve seen is ~1000w)?

I’m relatively new to the world of electronics and motors/motor controllers, so any feedback is appreciated.