Battery Dead? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 7 (permalink) Old 08-01-2010, 03:26 PM Thread Starter
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Battery Dead?

I rode my bike to work today. Started beautifully. But later, when I got on to go home, the battery was dead as a doornail.

I put a trickle charger on it for a while, but nothing was happening. So I applied jumper cables from my car, and it started right up! I left the cables on for 10-15 minutes.

Problem... when I take the cables off, the lights flicker and the power goes out.

What does this mean? That the battery is dead and therefore won't accept a charge? Or is there something else going on?

EZC


Last edited by EasyRector; 08-01-2010 at 03:39 PM.
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post #2 of 7 (permalink) Old 08-01-2010, 04:51 PM
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How old is the battery? Have you checked the terminal connections?

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post #3 of 7 (permalink) Old 08-01-2010, 04:52 PM
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Can you charge it and check voltage? That's where I'd start. Check the connections too.

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post #4 of 7 (permalink) Old 08-01-2010, 06:11 PM Thread Starter
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Quote:
Originally Posted by Hiker View Post
How old is the battery? Have you checked the terminal connections?
It's a Yuasa, and it's at least 3 years old... probably closer to 4 years old.

The terminal connections are tight and clean as a whistle.

EZC

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post #5 of 7 (permalink) Old 08-01-2010, 06:31 PM
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Clean your connections...turn around three times bang out the tune "slow ride" on the mufflers and hope that it picks up the charge...3 years is about the life of the AGM batteries.. but sometimes you get lucky.
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post #6 of 7 (permalink) Old 08-01-2010, 07:15 PM
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Clean and retighten connection on batt and the frame.
I had a charging problem with my system. I had to jump it off at work. It turned out that my connections were dirty and and not making contect. Now it starts good and the volt meter works great, 14+ volts as before just barely over 12 most of the time.

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post #7 of 7 (permalink) Old 08-01-2010, 10:19 PM
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It would take longer than 15 minutes to charge the battery. I'd put it on a trickle charger over night, then take it to a battery shop and have it load tested. That will tell if the battery is good or not. If the battery is good, then the charging system has a problem. Just so you know, the bike will run for about 20 minutes on a fully charged battery with no output from the charging system.

Once you get a good battery in place, go through the "fault finding chart" on this page http://electrosport.com/technical-re...-finding-guide, near the bottom, to find the real problem.

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