CB550F stator question

[dualitymike]

Hi guys.

I'm diagnosing a no charge situation on my CB550f. I've tested the field coil and it is a perfect 4.9 ohms resistance. This is exactly in spec with the repair manual. I've tested the stator and it reads 1.0 ohms resistance when measuring between any two of the three output wires. I've checked 3 separate sources and the factory spec for this test is 0.35 ohms resistance. That's fine with me but now I've tested four separate stators and they all measure 1.0 ohms. So the question is, could all of these stators fail to the exact same number? Seems like too much to be coincidence. I don't know the science behind this so maybe someone can tell me why all these stators are reading 1.0 ohms instead of the 0.35 ohm spec that they should.

Mike

 

[Bert Jan]

Hi guys.

I'm diagnosing a no charge situation on my CB550f. I've tested the field coil and it is a perfect 4.9 ohms resistance. This is exactly in spec with the repair manual. I've tested the stator and it reads 1.0 ohms resistance when measuring between any two of the three output wires. I've checked 3 separate sources and the factory spec for this test is 0.35 ohms resistance. That's fine with me but now I've tested four separate stators and they all measure 1.0 ohms. So the question is, could all of these stators fail to the exact same number? Seems like too much to be coincidence. I don't know the science behind this so maybe someone can tell me why all these stators are reading 1.0 ohms instead of the 0.35 ohm spec that they should.

Mike

When the bike is running, how much current is between either yellow wire coming from the alternator? Don't unplug it, just pry the meter terminals in the plug. Should be around 30 to 80v AC.

When they are between 30 and 80v AC, your alternator is ok. I suggest you invest in a combined regulator/rectifier, like this:
http://forums.sohc4.net/index.php?topic=47779.0

i have them in the shop an can ship them. Best electrical upgrade to do on a cb four.

Now, the values i mentioned can vary. 25v to 110v AC is not uncommon, but very painfull/hazardous. Use common sense and be carefull. 110v AC does hurt.

Also, read this:

http://www.electrexworld.co.uk/pdfs/Trouble-Shooting-RR24.pdf