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Old 11-24-2013, 07:23 PM   #1
Brian2006
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GSXR Charging woes (videos included)

Back story: I have had a couple recent issues with charging/electrical system on my 2006 GSXR 600. I replaced the R/R with Mofset and added a new sealed battery. They both have less than 200 miles on them. The bike appears to ride fine once started, but occasionally it will not crank once parked. See tests below:

Battery voltage test:


Stator AC Voltage test:


Stator resistance test:


The fact that I am unable to get any AC voltage reading on the A/C stator terminals leads me to believe the stator is bad. I was thinking even if I had a bad stator, I would still get some readings so maybe I'm measuring it wrong? However, my resistance readings is consistent across all terminals. Thoughts on what is wrong?

Mods feel free to move if this is not the right section
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Old 11-24-2013, 09:34 PM   #2
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looks like one of the phases on your stator windings went out. It barely makes enough power to keep itself running.
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Old 11-24-2013, 10:06 PM   #3
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From the ohm readings the stator windings look to be OK. I suspect a shorted rectifier on the winding that has no AC voltage. That is assuming the stator AC voltage tests were made with the rectifier connected. If the windings were connected to nothing but the meter, then it looks like a bad stator winding.
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Old 11-24-2013, 11:26 PM   #4
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If your not getting the same ac voltage out of each one of the three ways to connect to the yellow wires, then the stator is bad. It is possible the stator could have ruined your new RR. You can test it though using the diode test mode on your meter.
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Old 11-25-2013, 09:24 AM   #5
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Bad stator.
Hard to tell but in the third test it appears as all 3 legs are going to ground?
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Old 11-25-2013, 09:43 AM   #6
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Quote:
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Bad stator.
Hard to tell but in the third test it appears as all 3 legs are going to ground?
Yes that is how I did the test. I also measured resistance on all 3 A/B, B/C, A/C terminals after the fact and got 0.4ohms on each combination.
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Old 11-25-2013, 10:24 AM   #7
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Quote:
Originally Posted by Patrick View Post
Bad stator.
Hard to tell but in the third test it appears as all 3 legs are going to ground?
This.

You should be getting just over 13v at the battery at idle and ~14.5v at 5k RMP. You're getting .4ohm resistance on all 3 legs, and I think the max allowed resistance is 0.1ohm. Do not buy a 3rd party stator. They have a much higher chance of being defective. Spend the money and buy OEM....and don't forget to buy a stator cover gasket.

FWIW...I've tried to do the A/C test on my rectifier but couldn't get a reading (with a brand new, OEM perfectly functioning stator). Guess I might not have been doing it right.
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Old 11-25-2013, 10:55 PM   #8
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yes your stator is bad, I agree with Patrick

first your ohm reading to ground should be OL or open line, if you meg the stator you should read about 2 GigOhms or more at .1 ohm to ground its grounded

second at .1 ohm across windings your not going to make any voltage it should be between .2 and .5 ohms so your .4 ohms across the windings is good and the stator should be putting out somewhere about 65 volts AC or more while running plug NOT connected

get yourself a new stator install it and take all the you have attached and disconnect it.

There are several good after market stators and OEM is ok

as you are checking your voltage make sure the meter is on the 200 volt AC scale or auto AC, check from line to line if your meter is on DC or too low of a setting the meter will not read it.

MAKE SURE THE STATOR IS DISCONNECTED FROM THE ELECTRICAL SYSTEM
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Old 11-25-2013, 11:10 PM   #9
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Really? When I installed my OEM stator I checked resistance before buttoning everything up. Two combinations on the stator plug read 0 ohm and one read 0.1ohm. I get 15.4v at my battery at 5k RPM.
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Old 11-25-2013, 11:17 PM   #10
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yea really, I promise you, get a real meter not some wal mart
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Old 11-25-2013, 11:21 PM   #11
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Quote:
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yea really, I promise you, get a real meter not some wal mart
Don't remember where I got it, but knowing me it was cheap. Just looked at the manual for his bike. Resistance between legs should be between .2-1.0 ohm.
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Old 11-25-2013, 11:30 PM   #12
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Quote:
Originally Posted by pinball View Post
Don't remember where I got it, but knowing me it was cheap. Just looked at the manual for his bike. Resistance between legs should be between .2-1.0 ohm.
LOL, seeee!

really though I been thru all that stuff, got manuals for about 10 bikes so far, just looked up his bike and read my notes for the usual stuff. I use meters that cost in the 1grand range and even fluke meters aren't really good for checking ohms and grounds and they run in the 300$ range. but what I posted came straight from the manual.

btw when you work with 138KV its a good idea to have good toys, being fried sux
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