Two things. .9 ohms is the meter lead resistance/and/or zero error. .9 ohms resistance on the white wire (if it actually was resistance) is of no concern.
The thing about this thread that worries me the most, is your description of parts not be firmly fastened to the laminates !
fault finding stator (all readings perfect) SORTED! :)
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olliewtf
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Cheers Daggs.
I think I'm barking up the wrong tree slightly and need to re rivet the stator.
This will, along with checking the solder joints, sort any earthng problems I may have.
I'm still not 100 percent sure what the fault is as i do seem to be getting a good earth. Will check out the lt coil too.
Can anyone point out which rivets are strong enough and the right size for this application? Never done any riveting before so bit of a noob in that department...
Cheers all!
I think I'm barking up the wrong tree slightly and need to re rivet the stator.
This will, along with checking the solder joints, sort any earthng problems I may have.
I'm still not 100 percent sure what the fault is as i do seem to be getting a good earth. Will check out the lt coil too.
Can anyone point out which rivets are strong enough and the right size for this application? Never done any riveting before so bit of a noob in that department...
Cheers all!
I once replaced the rivits in a stator laminates using small stainless roundhead setcrews. I put nuts on the underside and rivited the end of the screw. Worked a treat.
What makes you so sure your cdi is ok, when every check is pointing to a good stator.
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olliewtf
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I have 2 stators. indian one and this vespa converted one. vespa one was fitted first until it one day just stopped sparking. i took it off and fitted an indian one. indian one after 300 miles the lt coil failed. thought it would be simpler to return to the vespa stator and fix that. whilst testing both stators i have swapped out cdi, to no avail. therefore by default the cdi is fine. when the lt coil failed on the indian one i ould still get a spark, indicating that the cdi is doing its job. i wish it was the cdi, would be a lot simpler!
today i will be taking off the vespa stator again, and checking the lt coil for breaks that arent immediately obvious when testing with a meter.
today i will be taking off the vespa stator again, and checking the lt coil for breaks that arent immediately obvious when testing with a meter.
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olliewtf
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righto, think im getting somewhere now.
stator off again, decided to re test everything and check earthing points. the earth tag behind the lt coil earths the lt and pickup. i have noticed that when i tap the earth, very occasionally i get a spike in the readings of the lt coil and the pickup.
therefore i can only assume that this earth is not 10o% secure and is causing too high a resistance for the coils to function properly.
it was only a very very occasional spike from say 500 ohms to 1000 odd, so quick i could barely read it. wouldve assumed it was just my meter f@@king up. either way i decided to desolder the earths, check for breaks and resolder them then check continuity.
i have taken readings of both coils (pickup and lt) whilst hammering the stator with a non conductive instrument (the backend of a screwdriver).
readings stayed constant, the earth itself is solid and reading minimal resistance. I am therefore assuming now that everything is as it should be. i am now going to refit the stator, and if it still doesnt spark then im giving up. i cant for the life of me work out why it wont do its thing. i have gone over it with a fine toothcomb now, everything is solid and testing as it should. if there is a break in the lt coil windings, it has not shown itself on test whilst tapping the coil. I also dont think there is a break in the earth wire coming out of it as adam suggested as i applied pressure to various parts of this wire and coil and it stayed constant.
so fingers crossed. im not overly optimistic, but hey ho. at least i understand it a bit better and hopefully any future stator malfunctions will be far easier to problem solve.
thanks again everyone and will report back shortly.
stator off again, decided to re test everything and check earthing points. the earth tag behind the lt coil earths the lt and pickup. i have noticed that when i tap the earth, very occasionally i get a spike in the readings of the lt coil and the pickup.
therefore i can only assume that this earth is not 10o% secure and is causing too high a resistance for the coils to function properly.
it was only a very very occasional spike from say 500 ohms to 1000 odd, so quick i could barely read it. wouldve assumed it was just my meter f@@king up. either way i decided to desolder the earths, check for breaks and resolder them then check continuity.
i have taken readings of both coils (pickup and lt) whilst hammering the stator with a non conductive instrument (the backend of a screwdriver).
readings stayed constant, the earth itself is solid and reading minimal resistance. I am therefore assuming now that everything is as it should be. i am now going to refit the stator, and if it still doesnt spark then im giving up. i cant for the life of me work out why it wont do its thing. i have gone over it with a fine toothcomb now, everything is solid and testing as it should. if there is a break in the lt coil windings, it has not shown itself on test whilst tapping the coil. I also dont think there is a break in the earth wire coming out of it as adam suggested as i applied pressure to various parts of this wire and coil and it stayed constant.
so fingers crossed. im not overly optimistic, but hey ho. at least i understand it a bit better and hopefully any future stator malfunctions will be far easier to problem solve.
thanks again everyone and will report back shortly.
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olliewtf
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erm no. nada. nothing.
all back together AGAIN and still no f-ing spark.
tried another cdi again, just in case. triple checked everything, but it just doesnt want to.
readings are good. earths are good.
completely stumped. if i pull it off again i genuinely wouldnt know what to do next.
all back together AGAIN and still no f-ing spark.
tried another cdi again, just in case. triple checked everything, but it just doesnt want to.
readings are good. earths are good.
completely stumped. if i pull it off again i genuinely wouldnt know what to do next.
You should be able to see a spark from the green stator wire to engine case, when kicking it over. (take the plug out and use your hand on the kickstart, that way you can get close to the green)
If you have no spark and all your resistance readings are good. It has to be mis-alignment of the pick-up and crossover magnets in the flywheel.
If you have no spark and all your resistance readings are good. It has to be mis-alignment of the pick-up and crossover magnets in the flywheel.
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olliewtf
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I will check that out, did kind of try it earlier but to no avail. however, this stator and flywheel has worked together previously, with the same crank. nothing has been stripped, so mag and crank are in exact same position as they were before, when the stator ran.
the only change i can think off is the flywheel nut and washer, but that shouldnt be affecting height of flywheel as its always torqued up to the right amount. Im also pretty sure that the pickup height is the same as the indian stator i took off 2 weeks ago.
its rather frustrating as what youve said makes complete sense, but i cant see why it would suddenly be an issue.
the only change i can think off is the flywheel nut and washer, but that shouldnt be affecting height of flywheel as its always torqued up to the right amount. Im also pretty sure that the pickup height is the same as the indian stator i took off 2 weeks ago.
its rather frustrating as what youve said makes complete sense, but i cant see why it would suddenly be an issue.
I thought that some time back in this thread you said the laminate rivets were loose or missing. This would have an impact on the alignment.