My darn crystal ball is on the fritz again
You have looked at the engine.
We haven't. So.....how about some pics? Clear. Close up. Like you want someone to see the details through the bong smoke.
How about an engine number? I'll type it into Google for you so I seem like I know everything.
How about the tiniest amount information possible to help strangers on the internet HELP YOU?
Typically choppers will use a Sportster engine and put the better Buell parts on it, like the heads and such. But 34:19 is right, a Buell XB engine is easy to spot.
Buellmods.com for a wiring diagram, and engine number decode (or Google). But it will only confuse you because you aren't running ANYthing from it.
BUT, since it's converted to carb, I bet the CPS will be converted to coils fire the coil directly, not using the ECM. Follow the wires coming from the rights side case cover. there should be a little box.
Assuming a ton about the guys that build choppers, this will be easy.
The coil should have a 3-wire input.
Ignition power to the center wire (coil +), the other wires are the coil (-) that fire each cylinder.
The single wire sensor by the oil filter is for the oil light, it grounds to turn the light on.
The single wire sensor but the transmission output is the neutral light, it grounds to turn the light on.
The only other wires on the engine are the 3 stator wires coming from the clutch side. They go to the Voltage Regulator. They're all the same color because it doesn't matter what order, if you don't have a VR, you will have to ID the year of the engine to know what VR to use, or look at the stator. If you have a VR that came with this basket case, those 3 wires go to the VR, the other 2 wires on the VR go to the battery (+ and -). Charging system done.
The starter has a big stud that goes straight to the battery, and a small spade plug that gets (+) to crank the engine over. Starting system done.
If you find out whats you bought, it will help me be clearer.
"Your answers can only be as good as your questions"