New Rider
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Posts: 2
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Joined: Feb 14, 2018 13:36:24 GMT -5
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No Spark
by: enti - Feb 14, 2018 14:09:10 GMT -5
Post by enti on Feb 14, 2018 14:09:10 GMT -5
Hi guys I'm guessing you have done the no spark thing to death already but i really need some help with this one if you wouldn't mind. Ok so ive bought lexmoto fmx 125 2016 as a none runner for my son thinking stick a cdi on it and away he goes... not the case!!! the story so far...
I have 50 to 60 ac volts on the black/red wire on the 2pin plug at the cdi when cranking (so have ruled out the stator/magneto side of things)
Black/white wire on 2pin plug at cdi looses earth when cracking (so have ruled out faulty kill switch)
white/red wire appears to be pulsing when checking for resistance (so i have ruled out pick up sensor)
tried a coil and spark plug off his 50cc and still no spark.
now for something weird, having checked on the net it seems the top right pin on the 4 pin plug is to energize the coil however on my scoot there was no wire in it and the black/yellow wire is in the bottom left position (has anyone even seen the wire in that position before?), i have swapped the wire across but still no spark. so now i'm really confused as to the correct position of the black/yellow wire to the coil.
If it makes a difference to anything the replacement cdi was a blue new racing one as CMPO had no stock of original.
any advise please as i'm at a complete loss (and look a bit silly in front of my son who thought i knew what i was doing)
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No Spark
by: cyborg55 - Feb 14, 2018 18:21:09 GMT -5
Post by cyborg55 on Feb 14, 2018 18:21:09 GMT -5
Put it all back together with the original cdi &coil and everything put a new gapped Ngk plug in it and lite it up,,,and also check the hot wire off the ignition switch
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New Rider
Currently Offline
Posts: 2
Likes: 0
Joined: Feb 14, 2018 13:36:24 GMT -5
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No Spark
by: enti - Feb 15, 2018 3:48:22 GMT -5
Post by enti on Feb 15, 2018 3:48:22 GMT -5
thanks for the reply cyborg55....iv'e tried a ngk new spark and still no joy, what are you calling the hot wire from the ignition? do you know the color and where it ends up thanks
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No Spark
by: cyborg55 - Feb 15, 2018 9:37:33 GMT -5
Post by cyborg55 on Feb 15, 2018 9:37:33 GMT -5
If you've pulled the plastics ( I assume you did) there'll be a hot feed line coming from the battery then coming off the switch there'll be a few wires that go to different components using a test lite turn on the ignition and check all the wires coming out of the switch one or more may be dead,,if so then you'll know you have a bad key switch
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