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CDI
by: sailracer - Jul 24, 2013 15:36:10 GMT -5
Post by sailracer on Jul 24, 2013 15:36:10 GMT -5
Has Anyone had a problem with their scooter suddenly eating CDI boxes? Mine has ruined three so far . they start and run fine, but then Quit.Anybody have the wiring diagram? its an ac unit. The only thing I can figure is maybe the trigger wire and the power from the stator are somehow reversed in the harness. would it still fire like that?
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CDI
by: scoots - Jul 24, 2013 15:57:07 GMT -5
Post by scoots on Jul 24, 2013 15:57:07 GMT -5
try new voltage regulator
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Freshman Rider
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Posts: 55
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Joined: Jul 8, 2013 0:35:19 GMT -5
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CDI
by: djscootz - Jul 24, 2013 15:59:40 GMT -5
Post by djscootz on Jul 24, 2013 15:59:40 GMT -5
Wish I knew something helpful. The electrical systems to me are just crazy hard to figure out. Good luck
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CDI
by: sailracer - Jul 24, 2013 16:45:48 GMT -5
Post by sailracer on Jul 24, 2013 16:45:48 GMT -5
try new voltage regulator The thought crossed my mind' but I think the charging and firing circuits are seperate. A.C. CDI. If im wrong there, somebody tell me  |
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CDI
by: tvnacman - Jul 24, 2013 17:52:02 GMT -5
Post by tvnacman on Jul 24, 2013 17:52:02 GMT -5
try new voltage regulator The thought crossed my mind' but I think the charging and firing circuits are seperate. A.C. CDI. If im wrong there, somebody tell me You are correct they are different . the scooter can run without charging the battery and or headlights . what I have found if your ignition circuit is dc and you put an ac cdi it will run for a very short time . if it is ac and you a dc cdi it will not start . I would check the main fuse then check the black/red wire on the two pin plug on the cdi . First check the voltage with the key switch in the run position , kill switch in the run position . if it is a dc ignition you will have 12vdc , if it is ac ignition you will get 40vac + while cranking . Take the voltage measurements with the cdi unplugged . John |
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CDI
by: sailracer - Jul 24, 2013 18:05:18 GMT -5
Post by sailracer on Jul 24, 2013 18:05:18 GMT -5
[replyingto=tvnacman]tvnacman[/replyingto]Yeah Thanks  I definitely have an ac. systemThe original cdi was restricted. But getthis; The 2nd wire on the two prong connector(the one thats supposed to go to a kill switch) went down to a pickup sensor on the clutch bell. I disconnected it, and it revved like crazy. I bought a new 139qmb, and built it up BBK,cam,variator,gears,carb... I was not happy with it, so for now, I put the original motor back in. Heres where the problem started. No spark, so I tried an orange cdi. no good, I put in a used cdi, and it ran but rev limited.I put in a non rev limited cdi, It started and revved. when I went to ty wrap it to the frame and button up the plastics, no more spark. Is it possible that the wires from the stator were wrong? (firing or trigger ckt on power in ckt, and power in AC volts on trigger pin? would it start and run and then let go |
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CDI
by: tvnacman - Jul 24, 2013 18:19:24 GMT -5
Post by tvnacman on Jul 24, 2013 18:19:24 GMT -5
if you reverse the power and pulse wire it will not start/spark . Where are you getting the cdi's from ?
John
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CDI
by: sailracer - Jul 24, 2013 18:35:48 GMT -5
Post by sailracer on Jul 24, 2013 18:35:48 GMT -5
two came from my local bike guy. the used one ( the one that worked) we dont know ,the other, he got from parts for scooters, the original came in the scooter, and i ordered one from scrappys today.What sucks is I cant find any info on this bike. It's a Jonway YY50QT30 Raptor 50M30 I bought it with7 miles on it got theTitle but no manual and nothing online. closest is yy50qt28e still cant download anything on that  |
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CDI
by: tvnacman - Jul 24, 2013 18:37:57 GMT -5
Post by tvnacman on Jul 24, 2013 18:37:57 GMT -5
what is the engine number ?
John
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CDI
by: sailracer - Jul 24, 2013 18:42:42 GMT -5
Post by sailracer on Jul 24, 2013 18:42:42 GMT -5
[replyingto=tvnacman]tvnacman[/replyingto] 139QMB *120375052* If you can help me out here in any way,I'll be indebted to you  |
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CDI
by: sailracer - Jul 25, 2013 2:54:10 GMT -5
Post by sailracer on Jul 25, 2013 2:54:10 GMT -5
anybody with info on this model,chime in anytime too ;D
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CDI
by: scoots - Jul 25, 2013 9:18:49 GMT -5
Post by scoots on Jul 25, 2013 9:18:49 GMT -5
i got the blue "racing" cdi and i used it on 2 scooters for over 7k miles
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CDI
by: sailracer - Jul 25, 2013 14:46:40 GMT -5
Post by sailracer on Jul 25, 2013 14:46:40 GMT -5
Got a blue one today, getting a gold one tomorrow.Got another iridium plug too. Found these diagrams Attachments:
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CDI
by: sailracer - Jul 25, 2013 14:47:38 GMT -5
Post by sailracer on Jul 25, 2013 14:47:38 GMT -5
and this: Attachments:
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CDI
by: alleyoop - Jul 25, 2013 14:51:25 GMT -5
Post by alleyoop on Jul 25, 2013 14:51:25 GMT -5
Check the bottom wire on the TWO PLUG of your CDI with either a VOLT METER or a 12V light TESTER and see if you get a reading on the VOLT METER or the LIGHT TESTER LIGHTS UP.
Alleyoop
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jet
..BAD TO THE BONE..