you may have burned the wiring on the cradle where the battery plugs in.  It happened to me.  I tend to use throttle a lot and I have an upgraded controller so I send lots of juice through it. 

I replaced the connectors on both the battery and the cradle. 

Is your battery difficult to remove?  If so then it is a sure sign that you have burned the wiring.  Rads wiring is smaller than it should be.

you should put more information about the bike.  what year is the bike?  and which model?  There are more than one model of the city bike.  photos are best to have.  Also Facebook marketplace is a good place to list them too.

Look for LG and Samsung battery cells and you should be good.
On Amazon one says Bafang brand battery but I don't know if they actually make it or they are just using the name to bring you to the ad.

Quote from: Tree on April 19, 2024, 12:20:07 PMfollowing, as i haven't bought the kit but plan to in the next 30 days.

i haven't settled on my second battery yet, but leaning towards this Super Shark or this mini shark, but man, i hate how expensive batteries are...

If it were me I would go with a 20 to 24 amp battery.  That is where you will increase your range without being too large a battery.  Amazon has them. 

It might be a setting, but as long as you use both brakes at the same time I would keep it disconnected until you can find the issue.  The purpose of the brakes being connected is to turn the motor off so you can come to a stop without the bike continuing along. 

Yes you will need to make changes. I have a different version. 
Maybe contact the seller for the settings.  You might find success on youtube as well.

which model kit did you buy?  there are 2 different ones depending on the bike you have.
that will help those interested.

if you add the accessories you mention then you won't be able to fold it.

should be able to find in any bike shop.  you could try RAD through customer service.  Possibly Area13 could sell and lace one up for you. 

from your photo it is the front wheel.  I suspect they hit the brake caliper.  It may be out of alignment. 
If you rotate the wheel watch the caliper as the wheel turns.  You can manually adjust the caliper by pushing or pulling depending the alignment need.  Once done make sure you find a clean clothe to whip off your hand oils you put on the caliper.  This is what seems to be your problem that the caliper is pressing on the brake pads. 

could be out of balance.  may have bent spokes and causing brakes to rub.

It does sound like the motor has an issue.  Is motor cable connector on the left or PORT side?  If so you can't open the motor up to check or repair.  Have you tried flipping the bike upside down to diagnose?  movement of the wheel....

You could try AREA13 for a replacement motor and they will even help with diagnosis.  They respond fairly quickly. 

Not sure why it worked before and now after shortage it doesn't work. 

Best of luck.  Let us know what comes of the motor issue.

yes new controller is more power but I have already gotten used to a different bike with tons more power. so that's why i say some extra power. I have the upgraded controller with a new motor and was very pleased until the bike needed a new battery.

Area13 should have that motor and may have a true 750 bufang motor as well.

you may know but it is a fairly simple swapping of the motor to into your wheel.

I is most likely the controller.  The rectangular box on your bike.  Area13 has the upgraded version giving you a little more power and a new color LCD screen.