engine died while riding and won't fire back up

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Soflowrider

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hello,
I was riding my 66cc MB today and I was running great up in till 10miles in my trip where it suddenly lost power and s**t off. I tried to start and it would not. I have a audio clip (actually took video in my pocket and didn't know it) of it dying out. but it won't let me post a video. I'm sure this topic has been beaten to death but I can't figure it out. I have the two wire Magneto that has a blue and black lead coming out of it. I tried to test ohms with my multimeter but it's reading zero. (Not sure if I'm doing it correct or its fried). The only other time I've had this issue is when I crossed the leads from the magneto to the CDI (black-blue and blue-black) I was thinking of just buying a new Magneto and slapping it on but then I thought maybe it wasn't the issue. Any Info would be awesome.
 
Probably have to be more descriptive about the not starting part such as is it turning over and dying, just cranking, etc. Also, did u check for a spark in a dark closed garage? Check the wiring to see if it has come loose (blue, black, and spark plug cap).
 
Probably have to be more descriptive about the not starting part such as is it turning over and dying, just cranking, etc. Also, did u check for a spark in a dark closed garage? Check the wiring to see if it has come loose (blue, black, and spark plug cap).

Everything was wire properly and the connections are tight, I've had the bike now for about a month or so and it was running fine up until yesterday. When I try to pedal start it sounds like it wants to fire up but just won't crank over. It's getting fuel and has compression. I will check the spark again when I get back home later. I have an audio/video clip of the engine running and dying out but I have not figured out how to upload it to the site
 
Just out of curiosity was it raining while you where riding or been near water? Any dirt in you're tank? Could be that a small grain of dirt is causing carb to flood. Also check the carb nuts bolts are tight and you're fuel lines in perfect condition
 
black to motor ground should be zero, blue to motor ground is usually around 350ohm (+ - about 40), but can be at 480 for some mags (read this on 1K or 2K scale depending on your meter)
 
Just out of curiosity was it raining while you where riding or been near water? Any dirt in you're tank? Could be that a small grain of dirt is causing carb to flood. Also check the carb nuts bolts are tight and you're fuel lines in perfect condition

I was out riding by the beach when it happen. I had a leak in the tank so I had to drain it and JB weld around the studs. I Will clean the carb out when I get back home and try to see if it fires up. But the only time it has ever acted like this is when I wired the magneto to the CDI backwards. Fuel flows out of the hose when I disconnect from carb and carb is full of fuel. Not sure if it's a fuel issue leaning more toward electrical.
 
black to motor ground should be zero, blue to motor ground is usually around 350ohm (+ - about 40), but can be at 480 for some mags (read this on 1K or 2K scale depending on your meter)

I have the magneto off the motor and when I test with the multimeter I get zero readings. If I do get a reading it's not constant it just jumps around and settles at zero.
 
jumping around could mean connectors are corroded or wires are broken, but I'd say try a new stator
 
Here's a trick: remove the air filter. Next time you try to start ( assuming fuel, compression and spark) once you drop the clutch ( preferably going downhill) give it WOT and cover the carb intake with your hand. This will make it really rich and it should pop.
 
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