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Old 11-08-2014
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Stator testing

Is it possible for a stator to be faulty even if the resistance of the coils is within the tolerances stated by the workshop manual?
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Old 11-08-2014
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Originally Posted by nuggetwr View Post
Is it possible for a stator to be faulty even if the resistance of the coils is within the tolerances stated by the workshop manual?
Does the manual provide any AC voltage output tests?
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Old 11-08-2014
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No, the bike in question is an 04 WR250f.
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Old 11-08-2014
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I tested AC voltage a few months ago and from memory it was around 0.5 to 1 VAC. Can't figure out why my bike isn't charging the battery and just not sure if it could still be the coil causing the problem
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Old 11-08-2014
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In the absence of an expert, I'll offer the following;

Your stator should be putting out more than 0.5 - 1 Vac, i am not sure how much your WR should be putting out but likely around the +50 Vac at 5000 RPM.

Your results beg 2 questions, is it the way you set up the multimeter and which wires you picked off or is there an issue.

Might be worth doing a youtube search for stator testing, there are a few good clips that will show you how to go about it.
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Old 11-08-2014
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Might be worth while checking none of the poles have gone to ground if you haven't already?
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Old 11-08-2014
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Quote:
Originally Posted by youngmic View Post
In the absence of an expert, I'll offer the following;

Your stator should be putting out more than 0.5 - 1 Vac, i am not sure how much your WR should be putting out but likely around the +50 Vac at 5000 RPM.

Your results beg 2 questions, is it the way you set up the multimeter and which wires you picked off or is there an issue.

Might be worth doing a youtube search for stator testing, there are a few good clips that will show you how to go about it.
Im with you on this one. That ac output is way down. 40v min ac between the 2 stater charge wires sounds about rite.
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Old 11-08-2014
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Originally Posted by nuggetwr View Post
Is it possible for a stator to be faulty even if the resistance of the coils is within the tolerances stated by the workshop manual?
Yep! My brothers CR500 stopped weak spark virtually no spark. Sent the coil to small coil rewinds in Geelong. They sent it back saying there was nothing wrong with it and that they had tested it and it was fine. Bike still would not go. Got them to redo the coils anyway. Bike ran fine after that! Dunno.
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Old 11-08-2014
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thanks for the replies. It was a while ago when i tested it so i'll redo the test tomorrow. The output from the rec/reg is low aswell, always just reads battery voltage no matter what.
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Old 11-08-2014
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Quote:
Originally Posted by hondahead View Post
Yep! My brothers CR500 stopped weak spark virtually no spark. Sent the coil to small coil rewinds in Geelong. They sent it back saying there was nothing wrong with it and that they had tested it and it was fine. Bike still would not go. Got them to redo the coils anyway. Bike ran fine after that! Dunno.
Thats the main reason I started this thread, The manual suggests that if the coil resistances are within spec then it is something other than the coil that is the issue, but with your experience that is obviously not the case.

Quote:
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Might be worth while checking none of the poles have gone to ground if you haven't already?
Not sure exactly what you mean by that, can you elaborate?
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