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  #1  
Old 04-02-2011, 04:27 PM
Weekend Warrior
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Default no spark on a 1985 yamaha 80cc

I am asking this for my father inlaw.He bought this 4-wheeler for his son we knew it wasnt getting spark when we bought it and it has turned into a nightmare up to now we have put a new cdi,coil,spark plug,wiring harness,checked the key switch off/run switch.Icant remember what the magnetic thing was called its by the fly wheel I call it that is new.any way he and I have gone over everything a thousand times cant figure it out dumped alot of money in it hope someone can help.thanks
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  #2  
Old 04-02-2011, 04:39 PM
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Welcome

Is it a moto 4 i still have myne it was my 1st bike

So what is actuly wrong.
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  #3  
Old 04-16-2011, 03:01 PM
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Default Thanx

But that doesnt help me get spark.Got anything else?
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  #4  
Old 04-16-2011, 03:04 PM
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Default sorry

Didnt see your ? It will not spark we tested everthing we could with a multi meter everything checked out if it didnt we replaced it.Dont know were to go from here.
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  #5  
Old 04-16-2011, 04:51 PM
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Is the magneto producing current. What about the magneto?
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  #6  
Old 04-16-2011, 05:25 PM
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1986 yamaha Moto 4
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Fuse? its under the seat. i blow them alot
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  #7  
Old 04-17-2011, 02:20 PM
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Default I think

We replaced the fuse,The magneto Which goes to the pick up coil I think that was not prducing aLOT of voltage but we replaced the pick up coil so could the magneto be bad?
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  #8  
Old 04-17-2011, 02:21 PM
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The magneto itself is original.
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  #9  
Old 04-17-2011, 02:46 PM
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That magnetos/stator been spinning in that bike for 25 years... Most defiantly that could be it .

Im not sure how to test them or how much current the stator on that bike puts out but its something you might want to look into , if everything electricals new thats the only thing it could be, or did you replace the stator/magneto already?

I dont know much about the specific model but all engine setups tend to work alike.

I hope thats what it is. Good luck...
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Old 04-17-2011, 02:46 PM
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1985, 80, 80cc, 85, cc, cdi, chinese, coil, info, moto, motor, spark, wheeler, wire, yamaha, yfm, yfm80



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