Now, this next part is going to be a bit crazy because of the fact that it is hard to read etc...but the first pic, is kind of how the power is going right now, through switches etc...
Second pic, is a cheater way to make the damn thing run. As far as a carbureted bike goes. It needs fuel, and spark, and the spark has to be at the right time. So power wise, you only NEED power to the coils, and the IC Ignitor. The last thing you NEED is GROUNDS ON THOSE. So, please chime in people if I missed a step, since I'm not doing my own harness at this time (mines done
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From the battery, take HOT aka positive, and put it to a switch. This switch will then run that hot through it and power the coils and IC Ignitor unit. The next HOT line you need is to your starter motor. So, use the starter solenoid wired in with a switch to make it work, OR jumper it to turn the bike over, preferred to have a button, but thats not always easy for new guys to electrical. Last HOT line I tossed in was the stator or Regulator/Rectifier line. Since this is used to "charge" the battery as it runs.
Now, ALL OF THE ABOVE need GROUNDS TOO. So, the battery should be grounded to the FRAME of the bike too, so the engine is grounded. Then make sure you ground the Reg/Rec, and the IC Ignitor too. Most likely will be a Black with Yellow line, as others will use the Black with Yellow as ground too.
Hopefully I'm not insane and I hope all goes well. Note how I still ran the 20 amp fuse in line on the drawings! Wow I need a beer after this for sure! If all else fails, I have to tear my electrical out when I send the frame to get powdercoated soon, since I did NOT make it pretty before. I have to get rid of the nest thats in there of wires. We'll get it squared away.