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So as suspected, the connector for the starter solenoid was installed 180 degrees off. The bike now turns over, but still doesn't start. S0, here I go with a couple more questions. 1. After attempting to start the bike for a couple minutes, I decided to verify that I have power at the spark...

Pretty sure that the plug was simply installed 180 degrees out. I will hook everything back up shortly and let you know. Thanks a lot for all the info/help, really appreciate it.

Can I completely dispense of the two wires that would have originally been connected to the always hot pins? Assuming I can, but just wanted to verify. Also, concerning the two pins that are not always "hot", are they only hot when starting the bike?

Yes

From the starter solenoid to the reg/rec, the ignition side is wired as follows. Red/white solenoid to red/white reg/rec Red solenoid was dispensed with as it originally would have run to the keyed ignition switch Red/yellow solenoid to start output of m-unit Red/green from solenoid to ground...

Good news and bad news. I'll start with the good first. Got the m-unit installed and figured out that the blinking of the bluetooth LED is normal and is indicative of the m-unit getting 12v from the battery. As you (Sonreir) stated previously, the m-unit does not go through its startup sequence...

Got everything hooked up today, but wanted to test each circuit before I finalized the wiring and harness. Connected power to the m-unit, this was the first time doing so, and nothing happens. The leds do not go through there initial startup sequence and none of them come on. The only led that...

Scratch that, I misread the schematic. Which makes way more sense now. Thanks, Drew

Rick Reg/Rec only utilizes three of the four pins in the connector that plugs into the solenoid. The colors are red/white, black and green. However, I do see a red/yellow wire in the schematic that runs from the solenoid to the start button. That said, do i utilize that spare pin slot, and if so...

Couple more questions and then I believe I will be set. 1. The motogadget schematic shows that the start wires that come from the output side of the m-unit are spliced together and then one single wire connects to the starter solenoid. My question is where does the wire connect on the...

If I am utilizing the original harness for the alternator, starter, spark units and ignition coils, do i need to provide a power wire to the spark units and coils or do they draw power directly through the original harness? Also, on the regulator/rectifier, which black wire do i need to splice...

I ended up figuring out the issue on my own by removing the ignition switch and metering for continuity between the Red and Black wires. When the switch is in the off position there is no continuity and when it is in the on position there is. I also came across a simplified schematic on the sohc...

I actually came across the thread you linked, but wasn't sure if the wiring held true for a dohc CB750. -Drew

Hey everyone, my name is Drew and I am new to the forum as well as this hobby turned obsession. That said, I suppose a little background information on my ride will be required. I purchased a stock 1981 CB750F that I am slowly turning into a brat/cafe racer mongrel. Anyways, I have come across a...