Sounds like a bad flywheel stator. You can test like this:
Remove the connector from the rectifier/voltage regulator. Attach an AC voltmeter to the connector's stator terminals (the two outer connector terminals). Now run the engine at governed RPM and observe the voltmeter reading. A good stator will develop at least 28 volts AC at 3,600 RPM. Less or no voltage indicates a bad stator.
You can also do a stator resistance check at the connector. Measure across the same pair of terminals above. A good stator will read 0.1 to 0.2 ohms. 0 ohms says the stator has a short; infinity means it's open.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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