Yet another R6 with a charging system issue - Yamaha R6 Forum: YZF-R6 Forums
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post #1 of 17 (permalink) Old 06-26-2018, 07:45 PM Thread Starter
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Yet another R6 with a charging system issue

To start off, I sold an 07 R6r and got a 2008 with 4,500 miles. This bike sat in a garage for 4 years without being turned on. Last time it was used, it ran fine, never had an issue(used to be my brother’s bike). Needed fresh fluids and a battery which I’ve done already.

Bike ran good around the neighborhood till I did a 20 minute ride on the fwy. Getting home, it turned off on me...check engine light came on along with code 46.

I’ve done ALOT of research on multiple forums/YouTube, even went to a motorcycle shop to get a second opinion. Going through all the testing of the stator and rectifier, they come back with positive tests, including the new battery, BUT the charging system still doesn’t read when doing the multimeter to battery,5k rpm test. Of course the shop said to replace the whole charging system. I call bs.
Now my question to you guys...what am I missing? All connectors look brand new with no signs of overheating wires. Am I over looking something?




Btw, I’m not a noob trying to yank your chains. I’ve been a member since 08, but had to make a new profile due to sign in problems. Thank you guys in advance!!
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post #2 of 17 (permalink) Old 06-27-2018, 07:34 AM
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Re: Yet another R6 with a charging system issue

nice job
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post #3 of 17 (permalink) Old 06-27-2018, 11:27 AM Thread Starter
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Re: Yet another R6 with a charging system issue

Quote:
Originally Posted by Cenusa Aurelian View Post
nice job
Thank you, but the job isn’t done yet. Still need to figure this electrical problem out.

Last edited by 3ggr6; 06-27-2018 at 11:30 AM.
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post #4 of 17 (permalink) Old 06-27-2018, 12:13 PM
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Re: Yet another R6 with a charging system issue

Haha, ignore that man. He's on his 5 post hunt to view links. Some people just have an annoying way of going about it.

But yea I am not much help either.

What was your multimeter reading of the battery with bike off, at idle and at 5k rpm? I'm sure you already followed one, but there are some pretty good flowcharts online that will pinpoint charging issue.

Check your ground is clean too.

It might help others too if you posted your diagnostic results when testing stator and rectifier.
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post #5 of 17 (permalink) Old 06-27-2018, 09:56 PM
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Re: Yet another R6 with a charging system issue

Are you reading anywhere near 14.2-14.4 volts when the bike is running/reved?

Chillin'... while the Lord watches over me!

I love my R6, but...there's no buts...
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post #6 of 17 (permalink) Old 06-28-2018, 07:38 AM Thread Starter
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Re: Yet another R6 with a charging system issue

Quote:
Originally Posted by Flyers28 View Post
What was your multimeter reading of the battery with bike off, at idle and at 5k rpm? I'm sure you already followed one, but there are some pretty good flowcharts online that will pinpoint charging issue.

Check your ground is clean too.

It might help others too if you posted your diagnostic results when testing stator and rectifier.
When the bike is off I get from 12.1-12.3 volts. At idle and 5k rpm...it doesn’t change.

The stator’s resistance tested at .4 ohms(my multi meter’s continuity was .3, so .3-.4=.1 ohms...right where it should be)Per manual, should be at .12-.18. I also did an A/C test while the bike was running and got good voltage all across.
The rectifier checked out good too with resistance open one way and also when flipping multimeter probes, it showed even readings.

I haven’t checked any grounds other than the battery...where should I start?

Quote:
Originally Posted by Straight Success View Post
Are you reading anywhere near 14.2-14.4 volts when the bike is running/reved?
It’s not. Only voltage I get is what the battery is reading. Oh, btw...I’m using a battery tender to charge the battery to be able to turn on the bike for testing.

Last edited by 3ggr6; 06-28-2018 at 07:41 AM.
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post #7 of 17 (permalink) Old 06-28-2018, 09:42 AM
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Re: Yet another R6 with a charging system issue

12.1-12.3 seems kind of low for a brand new battery. But I know that is most likely a symptom of the issue and not the cause, just pointing it out.

The bikes main ground is under the tank beneath all the connectors that sit there. Just move them aside and you sill see it. I'd inspect all ground wires (specifically main ground wire to battery). A bad ground could make it very difficult for the battery to charge.
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post #8 of 17 (permalink) Old 06-28-2018, 09:55 AM Thread Starter
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Re: Yet another R6 with a charging system issue

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Originally Posted by Flyers28 View Post
12.1-12.3 seems kind of low for a brand new battery. But I know that is most likely a symptom of the issue and not the cause, just pointing it out.

The bikes main ground is under the tank beneath all the connectors that sit there. Just move them aside and you sill see it. I'd inspect all ground wires (specifically main ground wire to battery). A bad ground could make it very difficult for the battery to charge.
Thank you. Iíll give that a check.
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post #9 of 17 (permalink) Old 06-28-2018, 01:05 PM Thread Starter
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Re: Yet another R6 with a charging system issue

Checked the ground wires, they are all really clean with no corrosion, nicely tighten.
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post #10 of 17 (permalink) Old 06-29-2018, 02:48 PM Thread Starter
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Re: Yet another R6 with a charging system issue

So here is a new one...did a test ride after charging the battery. 3 minutes into riding, my low oil light comes on...then goes away as Iím trying to pull over. Keep riding, 10 min later, the bikes electronics go completely off, BUT the bike keeps on riding like normal!

Rode it back home like that since I couldnít get the lights and speedometer back on after a few clutch jump starts.

Thoughts?
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