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  1. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Alright now that the precharge circuit is tried and true, I have another question for y'all! I'm beginning to design my battery box. I will be making it out of mild steel. It will eventually being painted or powder coated, but I am wondering what to use to insulate and support the battery. I'd...
  2. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Yeah it definitely takes a couple seconds, but I'm willing to spare that. I think of it like priming the fuel pump on a car. On a related note, I have a question regarding the pre-charge circuit. So I know that when opening the circuit, the process is along the lines of: flip the precharge...
  3. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    This is a completely fair point. I figured having at least one more safety can’t hurt besides the key switch off the controller. That said if this next contactor suffers the same fate as the last one, I’ll just leave everything plugged in. I guess it’s good to figure all this out while it’s...
  4. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Ok, I just ordered the 72v coil from amazon that you recommended. You said you've worked with this one before, correct? Any issues or so far so good? We'll see if the same issue occurs as the last contactor ... hopefully not. In the meantime I get to start making the battery box :D
  5. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    I’m now taking recommendations for a new contactor if you have any tried and true winners.
  6. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    I tried disconnecting everything like you stead still to no avail. Are there any other tests I can run or is my contactor as good as dead. Here is a video of my test and the setup:
  7. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    That's what I was thinking too but I just can't explain the full continuity, regardless of the switch being on or off. I attached the best picture I could and a video of the switch having an audible effect on the contactor without turning off the power AT ALL. The battery monitor is monitoring...
  8. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Sadly I bought it at the end of may and just not got it unboxed and tested. To my avail... it doesn't work. The customer support of the website I bought it from said that, "these devices can be destroyed in seconds," which is absolutely baffling to me. They essentially believe the fault is on my...
  9. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Just tested for continuity across the contactor and unfortunately it shorted when the switch was both on and off. Both switches themselves only shorted in the on position. So I guess the contacts are welded together; there goes $140 😭. I don't know how my circuit would've possibly welded the...
  10. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    I hadn't considered the capacitors in the controller. I have a little battery monitor at the connection to my motor controller. It reads 84v and I can turn the keyswitch for my controller and still have lights and motor power. It's the weirdest thing.
  11. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Hi all! It has been awhile since I've been able to work on my e-motorcycle project but I finally was able to wire up the contactor and precharge circuit. I ended up following this diagram: Despite the excitement of seeing everything fire up, I am facing a problem where even when I switch the...
  12. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Yup, literally just color. In my mind this will help me differentiate between the two different functions: one enabling the precharge circuit, the other operating the contactor. Ha, that is fair. I figured I mind as well order it all from one place for simplicity.
  13. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Alright so I've been working on incorporating everyone's feedback and I believe I have come up with a pre-charge contactor circuit that will work for me. Parts have been ordered. :D For those curious about the components, they are as follows: 72V Coil Contactor 72V SPST Switch 72V SPST Switch...
  14. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Alright so an update for my wiring diagram. I have made a rough outline of what I think it should look like based what I have gathered so far. I will try to gather a list of components tomorrow. Any input or critiques of this diagram would be appreciated!
  15. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Haha, my head is spinning trying to imagine how everything can be safely wired together. For reference, I was thinking about using this contactor (TE Tyco Kilovac LEV200 72V 500A Sealed Contactor) so that I would not have to power the contactor from an external 12v DC/DC converter. How would...
  16. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    I think the synthesis that I have come to is that for safety reasons, I would still like to use a combination of a properly sized fuse and a 72v coil contactor. I do not think I really need a precharge circuit, but I may still add it just as another precaution. Better safe than sorry. The only...
  17. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Ha, for some reason, @harrisonpatm and @Dui ni shuo de dui 's comments. They hadn't loaded. Both of you make some interesting points that are definitely worth considering. My ideal circuit is uncomplicated but safe and reliable. I would be okay with having two physical key switches. One is...
  18. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Thank you for all the information, it has been extremely helpful! The only thing that I would like to add to my circuit for peace of mind is an extra switch for battery power. As of right now, I just have a key switch used to turn my controller on. It would be nice to have an extra kill switch...
  19. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Gotcha, the remote idea is definitely worth looking into. Likewise for “Great Scott” haha. Thank you!
  20. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Yeah I realize that. I’m hoping that it will suffice for my requirements. I figure I can always upgrade it later if I am not satisfied. I think the em260s uses the same wiring harness too which would be convenient.
  21. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Gotcha, I have a DC/DC converter which is already apart of the wiring harness that was provided with my shipment from QS. It is hard to be able to test if it actually works without having the full 72V battery so it may be wise to wait for that before I continue more testing. Thank you for all...
  22. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Wow thank you for the descriptive response! I really appreciate you taking the time to help me understand some of these concepts. I think one of the main reasons I'm confused is because of the contactor. I don't quite get how I would trigger the contactor. I'm confused where the 12v power comes...
  23. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Hi Sphere! I've been hard at work fabricating a lot of the parts I've needed for my build and I am now at the point where I need to worry about electrical. For background, I have: Controller: SiAECOSYS/VOTOL Programmable EM200-2sp 72V 600A Controller Motor: QSMOTOR 138 4000W V3 Mid Drive Motor...
  24. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    That's super sweet! It's nice to have the input from some more similar setups. I'd love to see a picture of that build 😁
  25. R

    First Electric Motorcycle Conversion Advice (1974 Honda CB360)

    Also realizing now this thread may have been better suited for the builds thread. Can any admins help with moving this?
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