electrical problem

Hi. First of all sorry If my english is bad. So I recently built my own custom ebike with Bafang BBS02B 750 W motor kit with battery. Everything is working very well and I've had a lot of fun riding it, except the battery seems to lose contact and because of that the ebike shuts off and I have...

Hi. First of all sorry If my english is bad. So I recently built my own custom ebike with Bafang BBS02B 750 W motor kit with battery. Everything is working very well and I've had a lot of fun riding it, except the battery seems to lose contact and because of that the ebike shuts off and I have...

I finished assembling everything today. Charged the battery, connected all the wires.... And nothing. It doesn't turn on, it doesn't go. There are a couple wires not connected to anything, but I don't see anything for them to connect to. This kit came with no instructions, and the website only...

We have the above listed bike and there is an intermittent problem with the following symptoms. 1. Turning bike on, the display will turn on but no MPH is displayed on the screen. Moving and or riding the bike (without any assist) does not help and the display will turn off after a time. 2. The...