Citizen/Mxus XF07 resurrection.

[bluegill]

I bought a Citizen foldable e-bike and the old battery is dead and the company that made it is not able to help.

My basic question is what do I need to purchase to get the electronics working on this again? The motor controller says 22.2 volts. The motor is rated for 36v. Can I run a 36 volt battery through a 22.2v MC or do I need a new motor controller? The wire coming off the motor is a Julet 6 pin and what I can tell online most components appear to be 9 pin.

Thanks in advance for any advice in terms of what I should get to make this bike electric again.

 

[harryS]

The motor connector indicates a sensorless motor with an internal speed sensor. These are harder to find.

Do you want to find a 24V battery and run it that way? The old controller is probably good. The bike might be a little slow, but it is a 20" folder, I own three of them, and I'm happy with 12-16 mph although mine can approach 20 mph.

If you go 36V, you might have to buy a new controller/display as well as a battery. More work than the bike is worth, although that's never stopped me from throwing money into a beater bike,

What model is the bike, and how are the electronics positioned? CItizen used to sell a front wheel motor kit with the battery in a bag, Now their only ebike has a rear hub motor and a seat post battery,

Sourcing a suitable battery is the least labor intensive approach if the controller is OK. If you can finagle a pair of 12V car batteries on series, you can test the bike first. You might also find that the controller will take 36V, and then you can upgrade. You also have to weigh whether the bike itself is safe on 36V,

 

[PCeBiker]

,.. You might also find that the controller will take 36V,

How do you find out other than plugging it into 36V to see if it blows up ?

 

[bluegill]

The motor connector indicates a sensorless motor with an internal speed sensor. These are harder to find.

Do you want to find a 24V battery and run it that way? The old controller is probably good. The bike might be a little slow, but it is a 20" folder, I own three of them, and I'm happy with 12-16 mph although mine can approach 20 mph.

If you go 36V, you might have to buy a new controller/display as well as a battery. More work than the bike is worth, although that's never stopped me from throwing money into a beater bike,

What model is the bike, and how are the electronics positioned? CItizen used to sell a front wheel motor kit with the battery in a bag, Now their only ebike has a rear hub motor and a seat post battery,

Sourcing a suitable battery is the least labor intensive approach if the controller is OK. If you can finagle a pair of 12V car batteries on series, you can test the bike first. You might also find that the controller will take 36V, and then you can upgrade. You also have to weigh whether the bike itself is safe on 36V,

Very helpful! I'm more interested in just making it work for now. A 24 volt battery is what I will look for. If there's any names or features to seek or avoid I'm all ears.

While bike itself is old it's definitely not a beater. A lady bought it I think back in 2019 to get exercise but kept it in her living room and never used it. So it's a little bit of a relic. This link will take you to the Facebook marketplace listing with a bunch of pictures including electronics location.

They're basically put an extra little rack right above the front fender and right below the luggage basket. It was all custom designed for incredibly unique battery with a built-in tail light.

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Really thankful for the help and advice.