Yes, that is it.

Not sure about the voltage, whether or not one or two of the legs should show voltage even if one is shorted.

 

Thanks for the confirmation. Maybe I just wasn't getting good contact between the voltmeter leads and the plug terminals, but I'm going to replace the stator anyhow based on it failing the resistance check. Even if the previous owner had already replaced the stator with an aftermarket (like the Electrosport) there's no reason the resistances should be substantially different than what's specified in the service manual, correct?

 

You need to set the V meter to AC! Even a bad stator should give you some voltage. Measuring zero is rather suspicious.

What are the resistance to ground readings? They should be infinitive or very high. Measure resistance of each of the 3 leads against ground.

The winding resistance should be about the same for all 3. What are the actual readings for them?

 

...whoops, I should've known that! 😅 I will remeasure voltage in AC, duh.

Resistance to ground was infinite on all 3 terminals.

Rresistance from one point to another were all roughly the same, maybe 6 or 7 ohms, but it's hard to say with much certainty past that - resistance would drop steadily as I held contact across them.

 

You should see about 70V AC at 4k-5k rpm. Seems that there is no short to ground, at least not with a cold motor. So the stator may or may not be the issue.

Why you think you have charging issues? Maybe the battery is dying?

 

With the multimeter set properly, I was getting around 70V at 5K (though the bike had been running a few minutes, wasn't completely cold like the service manual suggests, not sure if that matters). I also rechecked the resistance today and while I could've sworn the other day I was reading like 7 ohms, today every pairing read something like 1.5 ohms initially, and then slowly dropped until it leveled off at 0.7 ohms (just at the limits of the service manual spec). So maybe my stator is good after all? or at least, it's good today? Thanks for the help with the diagnosing, guys.

 

Do you have a V meter installed? If not get a cheapo digital one and monitor the battery voltage whilst operating the bike. Invaluable information about the health of the changing system and the battery. Also allows you to know when you are drawing too much, for example running heated grips and heated gear plus 2 x H4 headlight bulbs etc.

 

I do have one, I started messing around with the stator because last time I road the bike the voltmeter was reading 12V or so (maybe even 11.8 V?) when I was stopped at lights, no accessories on, and it felt like the bike was close to dying. now it's back to reading ~14.2V at idle, not sure why it's behaving differently now. Haven't given it a good ride again, though, just a quick back and forth down the block and idling in the driveway.

 

Make sure that the battery contacts are clean and tight. Also the main ground cable to the engine case. Also make sure that the V meter has good clean contact to the battery and at any connections in its wiring.

You may still have stator problems that manifest themselves only when everything gets real hot. Just keep watching it.

How old is the battery? Do you keep it on a battery tender when the bike is sitting for extended times?

 

good suggestions, thank you. Battery is new, it was the first thing I threw at this problem when I noticed the old one didn't seem to be holding a charge great recently (and it was getting pretty old).

 

Set your meter to "ohms". Put one lead on any one of the three wires in the connector ( the one you show in the pic ) and put the other lead against a good ground. Do each of the three wires. If ANY of them show ANY change in the meter, the stator is shorted and bad. I think 70 VAC is a bit low.