Sunny df300 tkb smoking CDI modules By oneleggeddave (Read 1,508 times)

[oneleggeddave]

Hello there everybody, my name is Dave. I'm in Southwest Florida, I have a three-wheel sunny df300 tkb that I got that hadn't ran for some time. Long story short I went through the carburetor, replaced all the fuel lines and fuel filter, flushed out and cleaned the fuel tank filled it up with fresh fuel and then cranked the bike over to verify that the fuel pump is working.It still wouldn't run so I pulled the spark plug and noticed that it had a weak, intermittent Spark. So I ordered a new CDI module for it. I plugged it in and was getting ready to check for spark and as I did a little bubble opened up in the CDI module and it started to smoke out through that little hole. I chalked it up to just being a faulty module and ordered another one. The replacement CDI module came in and I plugged it in and went to check and it did the exact same thing. I'm kinda stumped so I wanted to see if anybody out there had heard of this issue or if anybody knows if there's some kind of known fault with these or even if it might be the wrong CDI that I've gotten twice. Any help would be appreciated thank you all very much!

[Alleyoop]

I think you are getting the wrong CDI in my opinion. Get your multi meter and or 12volt light tester and TURN THE KEY ON and TEST the WIRE THAT GOES TO THE BOTTOM OF THE TWO PLUG ON THE CDI.
It most likely will register 12 volts. Now the CDI's you are ordering are they DC CDIs??? You may be getting AC CDI's

LINK TO THE CDI's you have been ordering would help.
Alleyoop

[oneleggeddave]

Thank you very much for the response.

These are the modules that I have gotten:

www.partsforscooters.com/122-1-Linhai-260-CDI

The boxes that they came in were labelled with the same part number as what is listed on the website, however the module itself has no markings of part numbers or anything on it. Are there any tests that can be performed on the modules themselves to differentiate an A.C. unit from a D.C. one? Is it possible that I have been getting the correct cdi's and this issue could be developing due to a fault in the wiring or any other components on the scooter itself?

Any help is truly appreciated, this is beginning to become quite expensive at $40 a pop. :/

Thank you all very much, have a great day!

[oneleggeddave]

I forgot to mention this in my first post. It has an 8 pin connector rather than the two separate connector plugs that I usually work with. However, only five of the available 8 pins are in use.

The wires are (all of this is checked with the key on)
-Light green- has battery voltage with the key on
-Green-has resistance of 70 ohms
-Brown with a white trace-has resistance of 5.26m ohms
-black with a red tracer-has 5.20m ohms
Solid black- this one is kind of weird, it has continuity to ground at 0 ohms when I check for resistance. And then when I check it for voltage it is showing up on the meter that it is at battery voltage. Both of those checks are with the key on.

I'm stumped and don't want to go ripping into the wiring harness blindly.

Thank you for reading these long winded posts. I appreciate any ideas or input you may have. Have a wonderful day, ride safe, and watch out for the ones on the road that aren't watching out for you.

[Alleyoop]

Well here is the thing, A AC CDI is powered by the STATOR and 1 WIRE from the STATOR PLUGS INTO THE CDI to power it. Then you have another WIRE FROM THE PICKUP COIL from the STATOR that also plugs into the CDI to trigger when to RELEASE the voltage to the COIL.


A DC CDI is powered by 12volts from the battery WHEN YOU TURN THE KEY ON.

So knowing that WHAT ARE THE WIRES FROM THE STATOR and that will tell you if you "NEED" A AC OR DC CDI?

The number of connectors 8 not 5 would raise a red flag.

Do you still have the OLD CDI?