CDI questions. By offutt0311 (Read 3,389 times)

[Alleyoop]

No disapointment just trying to find out what you found since we new we have not heard of any scoot with 2 CDIs. The wiring on your CDI looks like it is a DC cdi and gets it's juice from the battery when the key os turned to on. Notice no killswire on the CDI since turning the key off cuts the 12volts to the CDI and the same with the killswitch.
Alleyoop

[Bashan]

If it's three phase it will have three yellows coming off of the stator running to the regulator/rectifier. It seems the high end three phase, modern scooters have relays so I figured if yours had a mega stator it probably had a relay. The three phase produces much more energy than the standard GY6 single phase. The three phase stators are always mainly a DC system like a 250cc. That is a good thing. Some of them still have AC powered components as the Chinese love to mix and match.

[mcgyvre]

rich - there ARE 3 yellows heading for the r/r. Is this good? Is that why my CDI & R/R are so big?

@oop - that's what I thought too, but it stays running with the battery disconnected. The r/r is also huge. About double the size of any I jave seen.

[Alleyoop]

Oct 28, 2014 21:49:30 GMT -6 mcgyvre said:

rich - no 3 yellows heading for the r/r.

@oop - that's what I thought too, but it stays running with the battery disconnected. The r/r is also huge. About double the size of any I jave seen.

Very easy to find out what you have either a DC or AC CDI bud. Either follow the power wire on the CDI back and see where it goes or just TURN the key on and test it. If you get nothing it is a AC CDI if 12 volts it is a DC.
So lets quit farting around and test the damn thing takes all of 5 minutes. Either with a 12volt Light Tester or a Multi Meter. If a Lighter tester if its a DC CDI it will light up Mulit Meter it will register 12Volts pretty straight forward and will take all the guessing and bull crap back and forth.
Alleyoop

[Bashan]

This:

shows a black wire into the power port of your CDI. Also, there is no B/W killwire. That indicates a DC powered system that is shut off by the ignition switch as opposed to a single phase system killwire. Almost invariably that is a three phase stator system. The only reason I bring this up is that can determine the type of CDI you have and if a relay is present. Can you get us a pic of your R/R like you did the relay?

[mcgyvre]

I didn't think you guys would be up. I edited my previous post to say there ARE 3 yellow wires as you described. What does this mean to me, besides more expensive replacement parts?

[Alleyoop]

Not necessarily more expensive but it does say you have a DC CDI which is what rich and I have said, unless you can show us by doing a VIDEO you disconnecting the battery and the motor is still running.
Alleyoop

[tvnacman]

Oct 29, 2014 0:05:09 GMT -6 Alleyoop said:

Not necessarily more expensive but it does say you have a DC CDI which is what rich and I have said, unless you can show us by doing a VIDEO you disconnecting the battery and the motor is still running.
Alleyoop

Alley , if he has a good 3phase stator and dc cdi the regulators output could hold the load demand for dc cdi preventing engine stalling . Remember some setups have a blocking diode , it blocks a back feed to the regulator from the battery , the regulators output powers items , then any extra jump the diode junction and charge the battery . I like to look for the ac power lead off the stator and measure the voltage at the cdi to determine . I'm also kind of finicky when it comes to troubleshooting electrical .

John

[mcgyvre]

All right, fellas, here we go. Sorry about the delay as I worked from 9pm until 6am this morning. Here is the video as requested.

[Alleyoop]

Thank you MC for the look see on your scoot which is setup a little different than most scoots. So it is a DC CDI but looks like it is fed 12volts from the R/R Or the RELAY one of the two and not directly from the battery that is why the volts dropped when he disconnected the battery.
Alleyoop

[Alleyoop]

Also I did not notice any other wires on the positive post on the battery. MC is there only the BIG RED Wire on the postive post? Now I am wondering if his SOLENOID is like some of the 250s that distrbute the juice from the battery and have a fuse on it. Can you take a picture of your solenoid. Because normally a thin red wire with a fuse from the battery goes to the ignition key and on yours that is not there. So I am thinking your 150 is setup like some of the 250s with this type of Solenoid:
Alleyoop

[mcgyvre]

It's there, just not visible in the vid.

[Alleyoop]

Ah, ok cool thanks, just making sure no other different wiring is on this scoot from most 150s.
Alleyoop

[mcgyvre]

So, now for the $64,000 question - what does all this mean? Is this a better system? Is it more reliable? Are parts going to be harder to find? What kind of downside is there? Do I need to specify this if I want to order upgrades for the CDI, coil, or R/R (not that I want to now, but if something goes bad, it's always a good time to add a little more oomph to the scoot). Anything else that y'all know that I might be need to be aware of? Like Mr. Oop's signature says, I don't know what I don't know, so it's difficult to ask the right questions about this out-of-the-ordinary set-up.

[Bashan]

The ignition is DC fired. The black wire is energized from the battery when you turn on the key. That supplies the CDI so the bike will start. Once started the three yellows are converted to DC and continue to run through the black wire. That is why it will run without the battery hooked up. I would have thought there would be a ground issue without the negative battery terminal but it must be grounding back through the stator and or regulator/rectifier. In any event, it is a DC CDI fired system, it is three phase, and it is pumping out a boatload of juice. There is nothing wrong that I see here. The other component is a relay, not a CDI. Your R/R had a black which is bike supply, a red which is battery supply, and a green which is ground. The three yellows are AC from the stator. A single phase would have a yellow, white, and green. Some three phase have a red/black off of a magneto coil which supplies AC to an AC CDI, but you wouldn't get 12v DC at the power port like you are getting. You have a three phase, DC powered system that uses the black wire for power off of the R/R. That is a good system and be glad you have it. Components are not that much more. Was there a problem at the start of this thread? I forget.