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  1. R

    Custom Bike Electrical Issues

    Thank you for those guides, they were very helpful! While I wait for the proper motor and controller to come in here is a terribly done video with all of the information I have for the current setup. When the motor controller and proper motor arrive I will try with them as a control group. If...
  2. R

    Custom Bike Electrical Issues

    Sorry if this is a dumb question but what does POS stand for, and would you happen to have an example of a precharge resistor or would the one from amberwolf be what you are referencing?
  3. R

    Custom Bike Electrical Issues

    That is very good to know, I have a homemade motor at home that is probobally outside the scope of the current goal. Would this motor here be a good option to re-test all of my connections...
  4. R

    Custom Bike Electrical Issues

    This was an amazing idea sorry I missed it when re-reading the forum. I had temporally borrowed the motor from a friend, would it be a good idea to buy this kit from amazon and return it if I get the motor to spin and if I break it to just accept the loss, or would I immediately ruin the...
  5. R

    Custom Bike Electrical Issues

    I am from Ohio and I had the exact thought about the colors not matching up for the hall sensors. However the motor controller supports a no-hall motor, the wording is a little rough but the same product from other sellers say the same thing, that it supports a no-hall motor (attached). When I...
  6. R

    Custom Bike Electrical Issues

    I know the wires were connected correctly because I matched the colors according the the attached diagram with the controller. I marked on each image the wires I was connecting. I tried both of the possible 3 wire throttle lines just to make sure that wasn't an issue as the translations are a...
  7. R

    Custom Bike Electrical Issues

    My guess for the -81 it's the black and red lead holes on the voltmeter are switched, reversing the reading. As for the overcharging concern, I don't plan to charge this battery in any way without a BMS, if I can get any sign of my setup working I plan to use this BMS...
  8. R

    Custom Bike Electrical Issues

    Sorry again for the long response time, here is a more top-down view of my battery if that helps you at all! If you respond ill get back to you within a few hours this time!
  9. R

    Custom Bike Electrical Issues

    I'm sorry for the long wait time between my responses, life happened and I had to put my interest on hold. As for your questions, my answers are as follows. You mentioned "Build notes: Some of the cells look like they have no shrinkwrap, and no insulator on the positive end between the cell...
  10. R

    Custom Bike Electrical Issues

    Yes, it is 20s 5p. The batteries are all old mixed and matched 18650 laptop batteries from a recycling center. I tested them with a volt meter upon purchase and put any cells below 2v aside. I used the Liitokala lii-500 full cycle on every battery and used a thermal camera to make sure the...
  11. R

    Custom Bike Electrical Issues

    If I have a controller that's rated 45a 72v would it be safe to 1) Connect my battery below attached to it without a BMS? If not would it be ok to use a 100a Bms or what kind of BMS should I use if this would not be a good configuration? I am very new to this side of things and couldn't find an...
  12. R

    Custom Bike Electrical Issues

    That's extremely helpful and informative! I opened the controller and the capacitors are labeled 80V. I had assumed that the manufacturer would have accounted for the max capacity of a lion nominal voltage 72v is 84v and adjusted accordingly. So thank you for bringing that up. You mentioned...
  13. R

    Custom Bike Electrical Issues

    No, it hasn't worked before. I have ruled out it being the throttle though. Nothing has changed since my initial attempt to get it to spin. Thank you for your super fast response I really appreciate it!
  14. R

    Custom Bike Electrical Issues

    I think I might have fried one of my motor controllers when I plugged my battery into it (the 48-72V 1500w one). I am aware in the image the power + and - are backward but I connected them correctly. There was a big spark when I touched the positive leads and it never made my motor turn when...
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