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  1. mustardCB750f

    1975 cb750f -purpose of the black wire.

    Here is the picture of the repair
  2. mustardCB750f

    1975 cb750f -purpose of the black wire.

    I've figured it out! So I'm still not 100% sure about the purpose of the black wire, but I believe it's anauxiliary power source or a common ground. The issue was in the points system, the yellow wire going to coil for cylinders 2-3 was frayed and contacting the base plate, I repaired the...
  3. mustardCB750f

    Starter Solenoid Connectors

    Hey Evan, so it the first plug you found on eBay appears to be the correct one, as for the other wires, the yellow and red one runs through the harness to your starter switch to send a signal to activate the solenoid. and the green and red one runs through the harness to your silicon along with...
  4. mustardCB750f

    1975 cb750f -purpose of the black wire.

    I bought this bike a little over a year ago in a box so I had no reference as to where anything went beforehand. The bike is almost complete now but I've been dealing with issue after issue on the wiring side of things, if seems like every time I fix something, something else stops working. I...
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