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I now have full spark. Even got her to purr for a second, on starter fluid.

Long story short:
I ran a wire to the positive ignition switch harness, and a ground from there as well. Got great colored spark from the old Autolite spark plug. The new Chinese plug was blue and orange colored. It works, but is garbage. I'll keep it as a backup, until I'm ready to buy a new Autolite plug.

I finally found a wiring diagram, for a 50cc motor WITH the 4 wire stator. Turns out that the Rectifier and ignition share a common wire. With the ignition getting power and ground, the rectifier worked. Sending power to the coil?? Or power to the CDI, then to the coil? I hate electrical...

Ultimately, I didn't need to buy anything, originally. Just needed a new ignition key and tumbler. I'm not worried about it, the plug boot had seem better days, spark plug works but isn't full of life like it once was.

I do have to replace the front brake reservoir. The sight glass had been broken some how, and no longer holds fluid. Figure that I might replace the ABS unit also, it's rusted tight.

New coil has a DOA secondary coil. Sending back under warranty. Few days there, week back.

Overall, $200 more would pay for the parts I need and the title.

Looking like I'm ready to chase down the titled owner, to get him to sign some paperwork for me.

Thanks for all the ideas and help guys,
~ Junior

Ok. I've solved the mystery part problem.
That part is the headlight resistor. YAY Me!

Also found a wiring diagram, in all it clarity! That's a huge relief.

So power goes from the stator, to the CDI, then off to the coil. However, the coil shares the same ground as the rectifier.

So if the rectifier is fried and doesn't work, then it's not getting ground? Is that right? Am I confusing me again? I hate electrical.

~ Junior

I hear you dude, I really do! I genuinely wanted to get a Stella. Still do.
But I don't understand these machines, from my washing machine. I feel like I'm starting from the ground up. And yes, the tinkering hobby aspect did play the major part of my buy. I want to be able to repair these things on my own. Give me a dirt bike, I can fix it. My VW has taught me a lot, and I'm still learning.
I just don't want to waste my money at a repair shop, when asking for help, watching youtube, and getting a little dirty can take care of everything.

I'm totally with you when it comes to fix it, then ditch it. But I have to fix it first.

~ Junior

Just out of interest. I hooked my battery charger up to the valve cover engine ground bolt. I was able to still send current through the starter relay. So the ground is good. Still no spark.
My question is this. What else could be disrupting the electrical flow?
A new stator, coil, cdi, plug, and gounds. Everything should be running smoothly, right? What else is there?

Out of curiosity(because I am a dog guy), I pulled out the fly wheel. Took a wire brush to the magnet. In the hopes that the pick-up was not getting a pulse. Nothing changed.

I just don't know what I'm missing,
~ Junior

Yea. I've had some back registration woes, of my own.
The ground was good. I also briefly took a wire brush to it. I could give it a little more elbow grease, but I feel it is good.


Thanks for the heads up with that one. I was referring to the plug with 9 wires. After laying in bed, playing on the phone. I think I've determined that it's the plug for the headlight harness.... I think. Broke out the PB blaster this morning, for the cluster cover screws. Should be apart when I attack it, when I get home.

A single Accessory wire.... might be put to use, for my USB port.... But that's pipeline dreamin.

Thanks for the responses guys,
~Junior

Just called up on the registration. I've no problems, so long as no situations have been acquired.
Just normal fees.

~ Junior