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Old 03-26-2011, 08:35 AM   #1
Vividkid
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07 GSXR 600 Charing system Diag..?

I brought my buddies bike to the shop today so we can figure out this charging system bug.

I need to know what kind of Voltage/ how much I should be seeing from the stator the rectifier (AC I assume) and any other tips for pin-pointing issues with this charging system.

Any help would be much appreciated so I can order some parts from Motorcycles Unlimited.
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Old 03-26-2011, 08:40 AM   #2
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well. when engine off, you should be getting ~12 volts and when bike is running, you should be getting ~13 volts. that is after rectifier voltage. I have no idea about after stator, prior to rectifier.
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Old 03-26-2011, 09:04 AM   #3
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We bought a brand new battery, charged it up..ran for a little while but it's draining the battery...
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Old 03-26-2011, 09:06 AM   #4
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Old 03-26-2011, 09:08 AM   #5
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Quote:
Originally Posted by Vividkid View Post
We bought a brand new battery, charged it up..ran for a little while but it's draining the battery...
check the voltage at the batter terminals. should be the voltages stated when off/on
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Old 03-26-2011, 09:23 AM   #6
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It's not charging...less then 12v when running.
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Old 03-26-2011, 09:56 AM   #7
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This one on the recall or no?
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Old 03-26-2011, 10:00 AM   #8
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No, 08+..missed it by 1 year.
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Old 03-26-2011, 10:27 AM   #9
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Quote:
Originally Posted by witchdoctor575 View Post
well. when engine off, you should be getting ~12 volts and when bike is running, you should be getting ~13 volts. that is after rectifier voltage. I have no idea about after stator, prior to rectifier.
AC output from the stator is 50-90, 65 is spec.
Check across each leg of the stator for continuity between each leg, also check for NO continuity between each leg and the ground.
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Old 03-26-2011, 11:56 AM   #10
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I'm having the same issue.. Think prob just the rectifier but need to get off so I can have someone check it out!
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Old 03-26-2011, 12:43 PM   #11
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Old 03-26-2011, 11:23 PM   #12
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Thanks much for the help guys...

I have to wait till Monday do get going because the brand new battery he put in a week ago will not take any kind of charge. Have to get it started first. I figure the rectifier but I always diag my problem before I hang a part on it.
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Old 03-26-2011, 11:31 PM   #13
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Have you noticed a rotten egg smell after you ride? My 07 had the same problem, took it to patrick and it was the rectifyer....apparently, suzuki forgot to include the 07's in the recall....id take it to Motorcycles Unlimited and someone trustworthy check it out.
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Old 03-28-2011, 10:07 AM   #14
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Update: Charged and installed new battery. No continuity to ground at stator connectors- Good. Tested Stator output @ 60-70 AC volts at 3000rpm on each winding...Stator looks good. Shut off bike, Reconnected stator to reg/rec.....Now charging system showing 14v+ DC volts at idle.

Diagnosis...DOA new battery(Replaced with another new one)

Another wad of money saved with a good diag = )

I suspected a regulator at first but good to know it wasn't.
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Old 03-28-2011, 11:37 AM   #15
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Where'd you take it to?
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Old 03-28-2011, 03:50 PM   #16
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Keep an eye on it.... I had one come in that was charging SOMETIMES.... I would test it and it passed all of the tests in the manual and show 13.8v at the battery while running.... Take it out and ride it for 30 mins and come back home to test it and it would be less then 12.0v. It turned out to be the regulator/rectifier......For some reason it would only pass DC current when cold but once it got hot, it would break the circuit....real weird.

This was on a busa.
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Old 03-28-2011, 03:55 PM   #17
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Quote:
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Keep an eye on it.... I had one come in that was charging SOMETIMES.... I would test it and it passed all of the tests in the manual and show 13.8v at the battery while running.... Take it out and ride it for 30 mins and come back home to test it and it would be less then 12.0v. It turned out to be the regulator/rectifier......For some reason it would only pass DC current when cold but once it got hot, it would break the circuit....real weird.

This was on a busa.
I figured that(it may get hot and quit) so I've been letting the bike sit and idle for a good hour at a time. That rectifier gets hot and sitting barley an inch from the header pipe I suggested that he replace it just due to the fact we KNOW it'll fail early in this particular model. It's at just over 2000 miles so I don't know how far they go.
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