Batt not charging - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 14 (permalink) Old 04-22-2010, 09:15 PM Thread Starter
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Batt not charging

On my last run back from Nashville I had to push start the bike every time I refueled. At the first stop the starter would engage but the bike would not start. at the second stop when you hit the start button there was not even enough juice to make a click. both times the bike started up just fine with a push. My headlight switch is having a few issues so i leave it on bright all the time - but I don't think that should be causing the batt to go out. Once I got it home I hooked the batt up to the charger and it took a night and half a day to recharge. (I have a pigtail on the batt so that I don't have to pull it from the bike to charge it if that makes any difference) The next day it started fine - I drove it about 20 miles and it acted like it was running low on juice. so I brought it home - charged it up and haven't driven it since. any thoughts? I just put a new stator in a few months ago. I should mention that it also has a sealed batt that is less than a year old.

That can't be my bike - it aint movin'

Last edited by trekbiker; 04-22-2010 at 09:17 PM. Reason: added some info.
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post #2 of 14 (permalink) Old 04-22-2010, 09:29 PM
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If you have a multi-meter, once the battery is fully charged, check the voltage with your key off. Should be around 12.5 volts. Then start up the bike and test the voltage at idle, and then when revving the bike to around 4k. Your voltage should rise up to around 13.8-14.5 volts when the bike is revved up. If the charging system is working fine, I'd take the battery to have load tested. We've seen plenty of batteries go bad way short of their perceived life span.

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post #3 of 14 (permalink) Old 04-22-2010, 09:52 PM Thread Starter
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OK for Fregy's question - I turned on the lights and got 14.3 V across the battery. I hit the switch and got 15 V at 4000 rpm and the high 14s at 1100rpm haven't checked the yellow wires yet

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post #4 of 14 (permalink) Old 04-22-2010, 09:56 PM
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Was the stator an Electrosport?

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post #5 of 14 (permalink) Old 04-22-2010, 10:10 PM
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Quote:
Originally Posted by trekbiker View Post
OK for Fregy's question - I turned on the lights and got 14.3 V across the battery. I hit the switch and got 15 V at 4000 rpm and the high 14s at 1100rpm haven't checked the yellow wires yet
Forget the yellow wires for now, I deleted that post as fergy`s test and answer were easier. If you are getting 14 to 15 volts dc, the stator is ok.

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post #6 of 14 (permalink) Old 04-22-2010, 10:11 PM
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Quote:
Originally Posted by trekbiker View Post
OK for Fregy's question - I turned on the lights and got 14.3 V across the battery. I hit the switch and got 15 V at 4000 rpm and the high 14s at 1100rpm haven't checked the yellow wires yet
Sounds like your charging system is working,maybe a little high on the dc output,take the battery out and have it load tested. The high charging voltages can shorten battery life by overcharging.......P.S...I just saw where Fergy had already told you to have the battery load tested,I agree with him on that.I shoulda looked at the earlier post.




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post #7 of 14 (permalink) Old 04-22-2010, 10:53 PM Thread Starter
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I am going to check the RR output in the morning (idea from Lance) when I am more awake and let you all know what I find I'll also have the Batt tested.

That can't be my bike - it aint movin'
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post #8 of 14 (permalink) Old 04-23-2010, 05:20 PM
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Sounds to me like your stator is ok: your Rectifier is ok- 14 - 15 V Dc. It is running once you get it started. If the battery was fried and the R/R was bad there would not be enough juice to run the ignition.

Sounds like a bad connection between the ignition switch and the starter solenoid or starter.
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post #9 of 14 (permalink) Old 04-24-2010, 01:09 AM Thread Starter
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Well - I just got back in from helping my son swap out a radiator in his Jeep Cherokee and while we were at the shop we did a load test on the bike battery - it showed 11.3 or 4 volts so I guess it's off to the battery store to do a warranty exchange tomorrow. I haven't checked the output from the RR - I'll do that tomorrow when I come back with the new batt just to be sure I don't have a couple of things going on.

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post #10 of 14 (permalink) Old 04-24-2010, 01:17 PM Thread Starter
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Per Lance's Idea - I recharged the batt. out of the bike last night and this morning I get a good reading on a batt tester that I have (only shows good or bad) So I am off to plug it up in the bike and see what the Volts read (it's the only way I know to add a load in parallel to check) - then I am going to unhook the batt and let it sit for most of the rest of the day and see if it dies on it's own in case I am getting some sort of drain from the bike wiring. I am also going to test the output of the RR while it's in.
I'll let you know how it turns out - By the way to answer flite's question the Stator came from Tim Parrott.

That can't be my bike - it aint movin'

Last edited by trekbiker; 04-24-2010 at 01:18 PM. Reason: typo
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