82 XJ650 Charging mystery.

I've been working on my bike for a few days but I can't quite figure out why my battery is not charging. Here is what I have done. I've explored a few threads and you guys are always extremely helpful hopefully someone has an idea about charging.

I think I've tracked it down the the stator/rotor but I'm still uncertain. My stator is reading 1.7 ohms resistance between each of the 3 wires at the connector (should be about 0.5 don't know if that makes a difference as long as they are the same?), I have continuity, and no shorts to ground. When the bike runs I get no current off any of the three regardless of rpms (I go from the lead to ground)

The rotor has magnetism or at least the sides and the bolt in the middle do, I cleaned off some light corrosion. The rotor doesn't short and I get 5.5 ohms resistance between the contact rings and Zero resistance on each individual ring.

I checked my brushes and they have plenty of wear before they reach their warning ticks. The wiring from the brushes doesn't give me any voltage at the connector.

I'm considering checking the wires to make sure they have resistance from start to finish but other than that I am at a loss as to why I am getting no power. Any suggestions? I'm new to this so please excuse any incorrect vocab or lack of detail in my descriptions.

Am I the only one who has experienced this? If you had something similar what did you do? Replace the stator? or the rotor?

 

There. Are tons of them around get a complete use one

 

A complete used stator and rotor?

 

I have a few parts bikes here,650's and 750's use the same one

 

out of spec is out of spec and your stator is way over the spec
your rotor is over spec as well but this could be just cleaning the contact surfaces.
from this thread
The Ultimate Relay, Switch, Sensor, and Diodes Guide
Checking Alternator Stators:
0.46 ohms +/- 10% for all XJ650, all XJ700, all XJ750, and XJ900RK models.
Note that the resistance specifications for the stators are extremely small; they should barely have any resistance at all (compared to most other electrical devices).
Checking Alternator Rotors:
4.0 ohms +/- 10% for all XJ650, all XJ700, all XJ750, XJ900RK, and XJ1100 models.

Note that worn, dirty, or damaged alternator brushes can affect these readings, as can "dirty" copper commutator rings on the rotor face (where the brushes contact the rotor):
end of info from thread quoted
you are measuring current from wire to ground? not how current is measured.
do you mean voltage?
that would be AC voltage not DC voltage until it passes through the Voltage Rectifier

could also be your brushes are not making good contact
do you have access to another meter to check your test results?
or some 10% or better resistors to measure to check your meter?

 

XJ550h
Thank you for the info! I do have another multi meter that I can check against. Should I be checking the stator for current or AC voltage while the bike is running? I'll go ahead and check all the numbers again.

I'll also clean the rotor surface and the brushes again.

 

I'll start checking around for a parts bike 650 or 750 here in Utah

 

you should check battery voltage DC , it should rise as the rpm is increased

The Ultimate Relay, Switch, Sensor, and Diodes Guide
Your charging system output VOLTAGE should be checked, again at the battery terminals, while the engine is running. The measured voltage should be:

* 14.2 - 14.8 Volts at about 2,000 rpms for all non-X models, and the same voltage for "X" models, but at about 3,000 rpms. Again, you would measure these voltages at the battery terminals with your voltmeter.

 

Thanks, Turns out my multimeter was giving bad readings, It would appear I am getting a charge just a weak one not sufficient. I will post with more details when I replace the multimeter.

 

measure volts AC from wire to wire. like A-B, B-C, C-A then see what you have.

 

Update Solved! I fixed the bike some time ago.
I ended running over to a junk shop and just putting parts in and out. Turns out the replacement regulator/rectifier was bad. Note, it had already been replaced once so that was confusing, and led me and my "mechanic adviser" on a goose chase. Got a good one in there and it charged up great! Hope this helps anyone else