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Old 06-29-2008, 01:00 AM   #1
wnchstr156
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Arrow 82' nighthawk doesnt charge.

I need someone help that may have a info on how to test the stator on my 82'nighthawk 650. It is charging very little if at all. I found out that that year doesnt charge under 2500 rpms but that doesn't seem to be the problem. I need to know the specs and the procedure for testing the stator. I know I cant test the regulator-rectifier. but I hate to spend money on parts if I don't need to. I assume the stator is the problem but I would like to test it first. If you can help I would gretly appreciate it! Thank you!
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Old 06-29-2008, 01:22 AM   #2
The_AirHawk
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If you're all thumbs, or have the tendency to hurt yourself when you work on things - THIS PROCEDURE IS NOT FOR YOU - GO SEE SOMEONE WHO KNOWS WHAT THEY'RE DOING! YOU HAVE BEEN WARNED, AND I ACCEPT ZERO RESPONSIBILITY IF YOU INJURE OR KILL YOURSELF, OR DAMAGE ANY PROPERTY IN ANY WAY BECAUSE YOU WERE UNAWARE OF COMMON SAFETY-PROCEDURES WHEN WORKING WITH ELECTRICAL SYSTEMS AND RUNNING ENGINES - YOU HAVE BEEN WARNED!!!

That out of the way, you'll need a multimeter that will check resistance (ohms) and AC and DC voltage. (yes, I said "AC" - as in Alternating Current)

With the key off; using your multimeter set to your lowest resistance-range, check the three yellow-wires going to the stator - should have continuity one-to-another, and it should be between roughly one-half (.5) to two (2) ohms. Greatly outside that range, the Stator is probably bad. There should be Infinite resistance between the wires and crankcase (i.e. NO continuity). Any continuity to the case, the Stator (or one of the lead wires) is bad.

Next, leave the connector apart and start the engine. Set your multimeter to AC Voltage, any range should work above ~120v. CAREFULLY! check each stator lead to each other one again (on a three-phase alternator, there will be three checks). You should see roughly the same voltage across each of the phases. If they're not equal, and any or all of them are below about ~50V AC, the Stator is probably bad. DO NOT LEAVE THE ENGINE RUNNING THIS WAY FOR VERY LONG - A "GOOD" STATOR WILL BURN-OUT RAPIDLY IF YOU DO.

Good Luck.
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Last edited by The_AirHawk : 06-29-2008 at 01:25 AM.
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Old 06-29-2008, 01:28 AM   #3
wnchstr156
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Your a life saver man! To put your mind at ease I have tested other stators in the past I know exactly what you mean. I just needed the specs. I wasnt sure if being so old if it was a common resistance or not. Thanks for all oyur help!
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Old 06-29-2008, 01:36 AM   #4
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Quote:
Originally Posted by wnchstr156 View Post
Your a life saver man! To put your mind at ease I have tested other stators in the past I know exactly what you mean. I just needed the specs. I wasnt sure if being so old if it was a common resistance or not. Thanks for all oyur help!
I don't know that bike in particular, but most-every bike made from the '70s through now with a permanent-magnet alternator should be roughly those specs. Of course, there's a fly in the ointment now and again.
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