CDI replacement question By genseeker (Read 3,194 times)

[genseeker]

The kit I ordered comes with a coil & triple prong spark plug.

I was able to electric start 1 or 2 times, then kick maybe a doz times but now it won't start at all. The new CDI I ordered hasn't arrived yet, hoping today.

[Alleyoop]

HAHAHAHA, I misunderstood what you said about the 3 prong, I thought you meant the cdi, but now you clarified it the 3 prong is the plug (DUH)
Alleyoop

[genseeker]

Well, today was the last day of the expected delivery date and no CDI. I've got work to do tomorrow so now I have to buy a new CDI for my son's scoot and I'll use it.

Is there any difference in how an AC & DC CDI are wired in? I figure my problem has to be some kind of wiring issue or a short but my brother can't find his meters, he moved recently & is still unpacking.

[Alleyoop]

Aug 31, 2015 20:22:44 GMT -6 genseeker said:

139QMB TaoTao ATM50. My CDI has 2 plugs - 4 pin & 2 pin. With the stock CDI, when I turned the key on I had absolutely no power, no lights. Even after making sure battery was fully charged still no power at all to anything. CDI measures 3/4" thick X  1 1/2" wide X 2 5/8" long on the black part.

A DC CDI gets its power from the BATTERY when you turn the KEY ON. A AC CDI gets its power from the STATOR as the Flywheel with its magnets rotates around it.

So as you can see if your scooter is wired for a DC CDI you always need a good battery for the motor to run.
TO VERIFY THE CDI FOR AC OR DC, TEST THE WIRE PLUGGED INTO THE BOTTOM OF THE 2 PLUG ON THE CDI WITH THE KEY ON.

The CDI that works is on your sons scoot right? Do both of your scoots have a KILLSWITCH and if so is their a BLACK and WHITE wire plugged into the TOP OF THE 2 PLUG ON THE CDI?

THE NO POWER TO ABSOLUTELY ANYTHING (HAS NOTHING TO DO WITH THE CDI ..PERIOD) That problem is due to several possible problems:
(1) Battery is bad
(2) The Fuse attached to the POSITIVE TERMINAL on the Battery is bad.
(3) Bad Ignition Switch(IF 12volts from the battery is PRESENT).
(4) BLack WIre is disconnected on the IGNITION Switch or down the line where it Plugs into a main connector that distributes the power to other things.

[genseeker]

power problem was solved. my low beam is burned out & son had flipped it off & my tail light was burned out. My concern is still with the CDI. just bought a replacement CDI for sons scoot cause it quit after being used in mine.

the CDI I had ordered hadn't arrived so I emailed seller to complain it was 2 days late, they claim PO was returning it to them & they'd give me full refund. Had been trying the track # they listed & it never showed on USPS web so I had told them I felt they were trying to scam me since USPS will let you track anything if it has a #, even if Amazon doesn't show the tracking. Took the CDI from sons scoot to local place & got replacement. Not trying to get one for mine until I figure out why its blowing them. Cant afford $30 every couple days for new ones. Is it just possible that both were on the verge of going out? Mine came ion the scoot, bought new June 2014. Son's appears to be aftermarket on a 2006 Jonway, no idea when it was put on or how many miles it has run.

What am i looking for when I test the plug?

ETA: Just checked & both scoots have a black/white & black/red wires on the 2 prong plug for CDI. Both scoots do have a kill switch.

ETA: Got back with the new CDI & son's scoot wouldn't start - low battery. Tried it on my scoot & no start - took both batteries inside and mine is dead. So looks like I have a problem in my charging system. Could that be what is causing all my probs? Only 1 charger so waiting for my battery to charge, then I'll do son's battery.

[Alleyoop]

See the BOTTOM WIRE(BLACK AND RED) on the TWO PLUG on the CDI. Test that wire WITH KEY ON with either a 12volt Light Tester or a Multi Meter.

IF your system is AC and you have it wired as DC(which means the bottom wire on the two plug is getting 12 volts from the battery) then the CDIs usually will get burned out.

So DO THIS:
1. TRACE the BOTTOM Wire on the two plug BACK and tell us where it is coming from.
2. TRACE the TOP LEFT Wire on the 4 plug BACK and tell us where it is coming from.

[genseeker]

I'll have to tear the front end off to completely trace the wires. None of my wires up @ the cluster match the colors on my CDI plugs. However, my CDI only has 3 wires connected on the 4 prong section, 1 ground & 2 colored wires which I'm guessing is fine because if I understand the pix above, it could have 2 grounds? After my son's battery charges I'll go to WalMart & get a meter. Will report back this evening what I find cause I got some work to do @ WalMart area & might as well get it done since I'll be there anyways.

[Alleyoop]

Yea the 4 plug most only have 1 green ground wire so that is fine.
But I will give you a little help.
1. The TOP WIRE ON THE 4 PLUG should go DOWN to the STATOR and you should find that wire plugs into another wire that goes to the PICK UP COIL.
2. The BOTTOM WIRE ON THE 2 PLUG should go down to the STATOR and you should find that a wire plugs into another wire that goes to the STATOR.

IF 1 and 2 above JIVE THEN:
If that is the case then you definitely NEED A AC CDI. Notice I say NEED A AC CDI cause I do not know what type of CDI you currently have in there, But if 1 and 2 above are TRUE then you NEED TO BY A AC CDI.

[genseeker]

SO wasn't able to get to WalMart today but got the batteries charged. Son's scoot is hard to start but we know it's old (2006) and needs rebuilt. You have to feather the gas to get it to start.

As for mine, got my battery fully charged, then set it aside. Checked it a few hours later after it had sat and the battery is low again. Just for hell I plugged my CDI into son's scoot & son's started once I charged his battery that got low from trying to start his scoot. Haven't tried mine because my battery is charging again. This is the battery that came with it so is it possible the battery is the problem? Could it be starting to go out and just be coincidence it worked on my son's scoot?

When I was able to start my son's scoot with my battery prior to today, it was just after taking it off the charger. My son didn't run it much the couple days he used it, maybe 15 miles total run. Haven't tried my CDI with my battery in my son's scoot today. Is there a way to test a battery & tell if it is going bad without just running it & hope for the best? Maybe autozone or advance?

Getting frustrated quickly. think I got the problem solved only to find something different not working.

[Alleyoop]

Appears that battery is bad but if you had a multi meter you could find out for yourself pretty quick.
But you can take it to just about any auto parts store have them test it and LOAD TEST IT.
Alleyoop

P.S.
If you guys are going to own scooters or motorcycles I suggest you go and get a multi meter and a 12v light tester you can get both of them for under $10.00.

[horace]

So, about that fuse issue........

Not an issue?

[genseeker]

No, wasn't the fuse. Had battery checked and it tested good at both Autozone and Advance. Finally was able to get test light & multimeter & then the rain started & been staying wet for well over a week now. Waiting on it to be a not raining day before trying to track down electrical issues. No way I want to wet with wiring in the rain.

[genseeker]

So past month has been pain hell for me so the scoot has sat.

My brother came over to trace the wiring and found that the plug going to the charging system was damaged so he fixed it. Spark plug was nasty so we got a new plug. She almost starts now but not quite. Getting plenty of fuel, he even tried to start it with starting fluid. Has a new CDI on it as well. She's getting fire and carb is not clogged. Trying to kick her over produces the same effect as starter switch.

Any ideas? He's coming over to try work on it again today but I'm laid up in bed again. Could the coil have been damaged by it not charging properly?

[jerryscript]

Check valve lash.

[genseeker]

Passed it along to my brother, he has it at his house now. What started all this was the belt broke. Took it to a shop cause my brother didn't have tools for the variator & I had a stiffer contra spring I wanted installed. Also got them to change the roller weights. My brother had set the valves according to the board specs not 2 months prior and she purred.

When the belt broke, she still purred but didn't move and rear tire didn't spin if on the rear stand so we figured it was the belt. When we picked it up, we had trouble starting it, shop said they did as well when I called them the next day. We had 2 scoots we needed to get moved & no truck right then to haul so I had to ride my son's home so he could get to work, then my brother took me to pick mine up. Once we got it started by kicking, it ran fine all the way back to his house. I stayed the night cause they worked nights & had trouble starting when I left the next morning so stopped by the shop.

Shop claimed they didn't even disconnect the battery but someone did something to the connector going to the charging system, the plug was casing was cracked and it wasn't completely plugged in. We didn't find that out until much later though because of me being either sick or hurting bad and my brother was working long hours. I was still sick when he came over to check the wiring and found the problem with the connector. He checked the connector on a Roketa I have for parts & it was the same so he changed the plug & made sure it was tight. Checked the spark plug while he was at it and replaced it.

Scoot turned over real well but wasn't quite catching so he tried some starter fluid after confirming fuel was flowing well & taking the carb off and spraying it out with cleaner cause at that point the scoot had been setting a couple weeks. Checked air filter as well & it was fine.

Brother just messaged me that the valves are still set right