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No spark
Jul 1, 2023 7:26:08 GMT -5
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Post by mike1234 on Jul 1, 2023 7:26:08 GMT -5
Trying to help my sister in law with her scooter. Has no spark changed cdi,coil and a new plug. Still nothing. I’m guessing stator next but can’t find exact replacement. The paper work has the engine as a XS1P39QMB. The stator only has a three wires coming out of it. A yellow and white on a plug and a blue by itself. Anyone point me to the correct stator or anything else to try? Thanks in advance
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Post by GrumpyUnk on Jul 1, 2023 9:12:31 GMT -5
You may have a DC CDI. The flywheel had a squarish bump that passes near a pickup mounted at about 11 on the stator housing. That is the FIRE signal to the CDI. If it is an AC powered CDI, there also be a winding coming from the stator area up to the CDI itself. So... muli wires to the CDI. If you need to have the battery in place & charged to have the CDI work, pretty sure it will be a DC powered CDI. Seems 'higher end' bikes use DC power for the CDI. Also Taiwan built or based companies will use DC. If you look on the web, you can find pics of bot kinds, and if you look on-site you can find wiring diagrams that should confirm/deny the type of CDI installed. Also, if an AC powered, you can disconnect the ignition switch completely, and be able to kick start the engine. The ignition switch provides ground to kill the CDI spark output, shutting down the engine. The three wires from the stator are the charge system, yellow and white any way. If you look at the wiring diagrams, you can likely figure if your CDI is DC powered. The kill for a DC is the ignition switch removing voltage, I think, from the CDI. tom
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No spark
Jul 1, 2023 12:20:17 GMT -5
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Post by mike1234 on Jul 1, 2023 12:20:17 GMT -5
It is a dc cdi and I replaced it with the same. Should I still have spark if the stator is bad?
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Post by aeroxbud on Jul 1, 2023 13:09:12 GMT -5
You should be able to test the stator with a multimeter.
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Post by classacted on Jul 1, 2023 20:34:07 GMT -5
make sure your connectors are tight on the coil (a problem I had with my gy6 early on). not a bad idea to run an extra ground wire from battery negative to frame.
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Post by classacted on Jul 1, 2023 21:02:05 GMT -5
I saw a used stator on ebay with a yellow and a white wire on a connector. no blue wire. seems that is a vehicle that is hard to find parts for. bummer. I wonder if it's possible to simply swap out the stator with a common 50cc gy6 stator.
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Post by GrumpyUnk on Jul 2, 2023 9:03:03 GMT -5
Not knowing the checks done, I would look for good power & ground at the CDI. I would also look for a 'tickle' signal from the pickup mounted outside of the flywheel(which is over the stator), about 11 on the clock. As the 'bump' on the flywheel passes, a signal should be sent to the CDI. Thinking, I do not think a DC powered CDI has anything inside the flywheel, and nothing needed on the stator as the battery provided its operating power. The coil should have a good ground on one terminal, and the CDI connected to the other. When the bump passes the pickup, the signal is sent to the CDI for it to de-power the coil and generate spark.(collapsing field causes HV juice to flow). tom
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