Modern Vespa

Howdy. I've reached the final steps of rebuilding my once-derelict 1980 Vespa 100. Along the way I switched to an electronic ignition stator and all-AC.

I was told the stator I received is an ET3 stator. I was expecting (in addition to the red, white and green wires going to the CDI) to have one power output wire and a ground. Instead, I have THREE wires on the output side: blue, green and black.

I'm sure black is ground, but what's up with the other two? Are they both 12 v output? My super-simple wiring loom is designed with just one wire bringing power to the switch. But I think the stator is giving me two.

I am no electrician. This will become obvious by my next question: If I just twist the two stator output wires together, will the result be 24 volts? Or just 12 volts with more amps?? The first of those options would be bad, the second good.

If it had just one power wire coming off the stator, I could proceed with confidence. With two wires, I'm not completely sure wassup. If I have a second power wire, I might use it for indicators. The loom is set up for them, but I'll get to them later. This is my first Vespa and, for now, I just want to get it up and running.



So I get what to do with a ground and one wire. But what should I do with a ground and two?

Grateful for any wisdom. Thanks.

An et3 stator is 6v and has 7 wires. It should have yellow, red, blue and black in addition to the 3 Cdi wires.

Yellow wire is for tail and park lights, blue is brake lights and red is for head lights and horn. Black is ground. You may be able to wire the 3 lighting coils on the stator in series like a pk stator is wired.

If you want 12v you can use a PK stator which has a blue and black pair of wires + 3 Cdi wires.

Sounds like a 12V stator. Black is ground, blue is unregulated AC output (goes up to 40V), green connects to kill switch…

Thanks.

I thought the guy I bought it from said it was an ET3 stator. But looking at the description I see that it just goes with an "ET3 flywheel", among others. It's 12 volt and has red, white, green going back to the CDI and black, blue, green coming off the power side, ready to hook up to the junction box.

Coming from the loom, there are three wires: black (ground), blue (power to the switch) and green. But this green is long, comes from the "kill" button on the switch, and I assume goes to the 2nd green terminal on the CDI.

Which, if that's the case, would still leave the green wire coming off the power side (next to the black and blue wires) with no place to go.

Again, all new to me and very likely that, like so much in life, I'm missing something obvious. But right now I don't know what it is. Thoughts?

Here's a pic of the wires coming off the power side, and of the wires coming back from the loom:

Connect each color to the same one on the loom and everything will work fine. The green wire of the stator is spliced internally on the low tension coil and parallel to the one going to the CDI so the engine will die pressing the kill switch…

That, sir, is totally rockin'!! Now I'm almost COMPLETELY out of excuses! It's getting on time to LIGHT THIS CANDLE !!

(Tho, you know, I gotta tension the gear-shift cables properly. Never done that either . . . )

Mucho merci.

iI

All true. Some smallies had their kill switch connected to the stator, most to the cdi. I'm guessing you could connect the green wire from the loom to either with the same result. Regarding the green plots on the cdi, they are also interchangeable.