First Electric Motorcycle Conversion Advice (1974 Honda CB360)

Are you using a 1k ohm pre charge resistor? I would guess it takes some time to finish pre charge in that case. I dont remember exactly, but I think for me with 20 or 30 ohm resistor it takes almost a second. Or at least half a second.
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 switch, wait 5 seconds or so, flip the contactor coil switch (to trigger full battery power). This makes sense to me, but is there a similar or inverse process for closing the circuit? Should I kill the contactor coil switch and allow the voltage to ramp down and then kill the precharge circuit or can I kill both switches at the same time. Or should I kill the precharge circuit directly after I energize the contactor coil.

I would really appreciate if someone could chime in about a process that works for them. I'm just trying to avoid the same fate of my last contactor (R.I.P.).
 
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 assume some type of non-conductive high-density foam but I figured it'd be small to check in with you all for any recommendations
 
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 assume some type of non-conductive high-density foam but I figured it'd be small to check in with you all for any recommendations
Usually the most common thing used is rubber sheets. They are inexpensive and easy to work with.
If you can, try to use another material for the battery box as steel is quite heavy. The less weight, the less strain on your powertrain.
Aluminum is easier to work with, it's easy to cut, easy to bend and if you don't have the appropriate welding tools you can always use rivets. Also, it won't rust, unlike steel.
 
It is advisable to use heat-treated aluminum, it is hard and elastic like steel, but 3 times lighter. I have been using this material for several years, the thickness of the sheets is 3 mm, on one of the mepeds I have repeatedly fallen and had several accidents, but the cabinet and the battery remained unharmed. By the way, after assembly and tightening with knitting needles, the battery was covered with 1 mm thick fiberglass, this is a very durable material with excellent insulating properties.
 
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