scuffa
2nd Class Ticket
Posts: 41
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Post by scuffa on Jul 17, 2024 6:50:08 GMT
I slowed down for a junction on my 56 plate PX125 and on accellerating again it started to miss until it cut out completely. It has lost its spark. I changed the plug and CDI which made no difference. I measured the resistance at the green wire and it says 563 ohms. Is this a normal reading as that was the next thing i was going to try? It has run fine until today. Thanks
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Post by adrian on Jul 17, 2024 11:03:30 GMT
Try looking in the last place you remember having it , it might still be there 🤣🤣🤣🤣🤣
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Post by gpowell on Jul 17, 2024 21:59:44 GMT
green to white 500 +/- 20 ohms
Red to white 110 +/- 5 ohms.
Try plug, cap and clip the end of the ht lead and redo ends.
Check ht to ground with cap off.
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scuffa
2nd Class Ticket
Posts: 41
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Post by scuffa on Jul 18, 2024 6:26:16 GMT
It turns out it was an internal break in the red wire. Replaced it and starts ok now. All ohm readings are within spec. :-)
The engine is now a BGM 177. Is it normal to have what I would call a piston-slap noise, worse when cold?
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Post by gpowell on Jul 20, 2024 8:38:50 GMT
Had that before corroded wires.
Good result!
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