coil coil and recoil

leo in wv · 05-20-2017, 05:16 PM

i ordered a coil on ebay recently, the listing says up to 250cc, but they keep sending me coils that clearly say 50cc-125cc on the label.
everything else "seems" to check out ok. i even went so far as to completely rewire the entire bike, just in case i may have missed a ground or something...

it will start and run for a couple minutes, then die. after that it will crank until the battery goes down without ever hitting again. if i give it 30 minutes to cool down, it starts right up and we do the whole thing again. it was running great before this coil issue came up.

am i missing something? are these 50-125cc coils the same as the 200-250cc coils?

the ebay seller says they are "identical" to the 200-250cc coils... i'm not so sure...

Bruce's · 05-20-2017, 05:40 PM

Try sticking the cdi in the freezer for a half hour to see if it will run a little longer .I have run tiny weedwacker coils on 250 dirt bikes before ,don't know what coil you ordered but it might be fine .

dpl096 · 05-21-2017, 10:16 PM

I've not tried the freezer test b4 but I've been told it helps to diagnose a coil failure....anxious to hear your results

bogieboy · 05-22-2017, 08:34 AM

I would dare say that your coil is fine... I would be replacing the cdi box before the coilll lot more to go wrong with a cdi...

leo in wv · 05-22-2017, 06:18 PM

i am willing to give it a shot. i looked at some cdi's en ebay, not sure about which one. what is the difference in the dc and ac cdi's?

05-20-2017, 05:16 PM	#1
leo in wv Join Date: Nov 2016 Posts: 75	coil coil and recoil i ordered a coil on ebay recently, the listing says up to 250cc, but they keep sending me coils that clearly say 50cc-125cc on the label. everything else "seems" to check out ok. i even went so far as to completely rewire the entire bike, just in case i may have missed a ground or something... it will start and run for a couple minutes, then die. after that it will crank until the battery goes down without ever hitting again. if i give it 30 minutes to cool down, it starts right up and we do the whole thing again. it was running great before this coil issue came up. am i missing something? are these 50-125cc coils the same as the 200-250cc coils? the ebay seller says they are "identical" to the 200-250cc coils... i'm not so sure...
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05-21-2017, 10:16 PM	#3
dpl096 Join Date: Sep 2015 Location: East Central Hellinois Posts: 1,344	I've not tried the freezer test b4 but I've been told it helps to diagnose a coil failure....anxious to hear your results __________________ ************************************************ * " Time you enjoy wasting, is not wasted." - John Lennon “I predict future happiness for Americans, if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.” ― Thomas Jefferson "If you don't know where you're going any road will take you there" ....George Harrison song
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05-20-2017, 05:40 PM	#2
Bruce's Join Date: Apr 2015 Location: Sudbury ,Ontario Posts: 855	Try sticking the cdi in the freezer for a half hour to see if it will run a little longer .I have run tiny weedwacker coils on 250 dirt bikes before ,don't know what coil you ordered but it might be fine .
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05-22-2017, 08:34 AM	#4
bogieboy Join Date: May 2013 Location: finger lakes NY Posts: 2,063	I would dare say that your coil is fine... I would be replacing the cdi box before the coilll lot more to go wrong with a cdi...
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05-22-2017, 06:18 PM	#5
leo in wv Join Date: Nov 2016 Posts: 75	i am willing to give it a shot. i looked at some cdi's en ebay, not sure about which one. what is the difference in the dc and ac cdi's?
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