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Post by carasdad on Jan 11, 2014 7:06:05 GMT -5
 + Like Alley said..if Chinese made..even 'New' is no guarantee. Also as he said the R/R has nothing to do with spark....that current to the CDI and coil comes directly from the stator. So make sure the stator is giving you consistent voltage from the red..or red/black wire.. Here is something I posted on another site that should help you.. Glenn 49ccscoot.proboards.com/thread/4666/easy-guide-spark-condtions
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Post by benburnin on Jan 11, 2014 7:06:53 GMT -5
i know it works because it was put one a week or so before i lost my spark and worked great i had needlesly replaced it in an attempt to fix a high rpm power loss problem, i purchaced it from a mechanic, so im pretty sure they both work
i mean it just seems unlikely to me that they both go bad at the exact same time unless something on the bike is frying the cdi
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Post by benburnin on Jan 11, 2014 14:59:05 GMT -5
i have read in several forums that you need something like .5 volts ac from the pickup where as I'm getting only about .2vac (assuming I'm measuring correctly) from both the new and old pickup coils. or maybe the voltage I'm getting from the power wire (about 50-60vac) isn't enough...
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Post by carasdad on Jan 11, 2014 21:31:57 GMT -5
i have read in several forums that you need something like .5 volts ac from the pickup where as I'm getting only about .2vac (assuming I'm measuring correctly) from both the new and old pickup coils. or maybe the voltage I'm getting from the power wire (about 50-60vac) isn't enough... 50-60 VAC should work fine. The .2 for the pickup is low.. HOWEVER it is often low..if not close enough to the flywheel. It does have a slight amount of room for movement. I turn the flywheel until the trigger on it is right below the pickup..then barely loosen the 2 bolts..Place a .10 feeler gauge between them and move the pickup down until it touches the feeler gauge..then tighten the bolts down. You have to remember that with very low voltage that is normally .5vac-1.0 vac... the distance from the magnet becomes more important than with a high voltage circuit such as your charging and ignition system. Hence..this the reason the inductance(pickup system) is adjustable while the other systems are not. So check that gap..  Glenn... <--- Glenn may cause...neck pain..back pain ...dizziness...headaches..nausea...vomiting...diarrhea.....constipation....hemorrhoids.......watery eyes....decrease in vision....increase in flatuence....impotence.....hives....testicular cancer.....moderate to severe hallucinations......and accelerated hair loss....Glenn may not be right for everyone......so ask your doctor.......if Glenn is right for you..... A Johnson and Johnson company....a name you can trust...  |
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Post by JerryScript on Jan 11, 2014 21:33:00 GMT -5
Just a shot in the dark here. Curious, did the new spark plug you put in have a resistor? They usually have an "R" in the part number if they do. If it does have a resistor, and your scooter doesn't call for a plug with a resistor, perhaps your system cannot overcome that resistance coupled with the coil/wire's resistance.
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Post by benburnin on Jan 12, 2014 18:44:54 GMT -5
im using the same ngk spark plug as before and i tried switching it with the old one no change also i tried to adjust the gap on the pickup coil and it rose the votage to .3 but still no spark is there anything that could be stopping the cdi from producing a spark, as i have tested 3 so far and they all get power and signal but send no spark, i checked the green wires where they connect at the harness and it looks good, i also used a light meter to see if current would go through the ground and it did any ideas?
i just ordered a new stator and cdi.....
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Post by benburnin on Jan 14, 2014 16:04:30 GMT -5
i know! its acting like its the cdi but like i said ive plugged in 2 so far.. but maybe they r broken, i payed like 15 at a bike shop . the one i just ordered was pretty cheap looked like the stock one so we will see.....
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Post by benburnin on Jan 14, 2014 16:07:14 GMT -5
does anyone have any other theories as to what would make it send out a small spark every once in a while but usually have no spark?
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Post by benburnin on Jan 18, 2014 12:47:56 GMT -5
replaced the cdi for third time no change only thing i havent replaced is the actual stator so im trying that next but im not very hopeful how could the cdi be getting voltage but not sending out a spark?
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Post by Mainely Scooters on Jan 18, 2014 16:25:28 GMT -5
TLDR.
CDI is bad. Not grounded properly. Bad wire in the harness.
CDI's are cheap. Always have two.
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Post by benburnin on Jan 20, 2014 18:53:18 GMT -5
well i tested the grounds to the cdi with a lighbulb meter and it light up when i touched it to the positive battery terminal. Im sure at this point its not the cdi and if the test method i used to check the grounds are correct i have good ground to the cdi. the stator will be here tomorrow, so if that doesnt work the mechanic will be the next stop.
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Post by benburnin on Jan 21, 2014 22:06:33 GMT -5
well i got the new stator today and hooked it up and it fired right up! nice blue spark! its running good, but now i am having a problem i once experienced on a scooter i had a couple years ago. the headlights are dimmed out unless i have the rpms ups with the break slightly depressed . i have noticed there is another thread on this forum similar to my problem but it doesnt seem to be going anywhere. anyone have any ideas? please note i didnt have this problem until after i changed the entire ignition system
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Post by alleyoop on Jan 21, 2014 22:11:13 GMT -5
Those symptoms that the lights get brighter only when the brakes are depressed is the R/R it is not regulating the dc voltage.
Alleyoop
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Post by benburnin on Jan 21, 2014 23:32:08 GMT -5
thanks for the reply alley:) yeah i was thinking it might be that, but im leaning towards a wiring problem either from when i put in the stator or when i was messing with stuff whats the best way to test that? and by the way thanks everyone for being so helpful and giving me so much free advice:)
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Post by alleyoop on Jan 21, 2014 23:49:43 GMT -5
Well first thing is Start the motor and put a volt meter on the battery and see what it reads at idle and then rev it up to around 4K and see what it reads at higher rpms. If low then it is one of two things the R/R or the Stator to test the stator test the power wire going to the R/R it should read 40-100Vac as you rev it up. If lower than 40Vac revving it is the stator. But even after you put in a stator it could also be the R/R so after the stator if it is charging good then your ok but if not then the R/R also went south.
Alleyoop
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..BAD TO THE BONE..