Wow, that didn't take long... - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 9 (permalink) Old 05-26-2009, 12:30 PM Thread Starter
 
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Wow, that didn't take long...

I rode to a friend's house this weekend and left the key on the "on" position by mistake. I realized that I had left the key in the bike about a half an hour after I got there and went and took the key out. Unfortunately the battery was already completely dead.

Its a brand new sealed battery I bought at the very end of the season last year. I even had it hooked to a tender all winter in a warm room to prevent any damage.

Is this normal? I jumped the bike and got it running and rode it a good 35 minutes before turning it off again, but I am just wondering if maybe I have a bad battery or if it is normal to completely run out after only 20 or 30 minutes.

Either way I learned my lesson and will remember to turn the bike off the next time. I'd like to hear your thoughts if maybe this has happened to any of the seasoned, or not so seasoned riders here.
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post #2 of 9 (permalink) Old 05-26-2009, 12:38 PM
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With the head light and the other lights on it does not take long to drain. A good habbit to get into is to leave the kill switch on and turn off by the key.


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post #3 of 9 (permalink) Old 05-26-2009, 12:49 PM
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X2 on what lance said
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post #4 of 9 (permalink) Old 05-26-2009, 12:54 PM
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Chances are your batt is still okay. I would not replace unless you start to expireince slow starts.

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post #5 of 9 (permalink) Old 05-26-2009, 01:03 PM
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automotive generators dont have the ability to charge a dead battery well.
bring it home, plug it into a charger and let it charge over night.
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post #6 of 9 (permalink) Old 05-26-2009, 01:04 PM
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Don't charge with more than 2 amps.

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post #7 of 9 (permalink) Old 05-26-2009, 02:28 PM
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Quote:
Originally Posted by lance328 View Post
With the head light and the other lights on it does not take long to drain. A good habbit to get into is to leave the kill switch on and turn off by the key.
......And yep, the key is also a good thing to have in your pocket when curious youngsters or whoever gets to messing around too...lol...
Have a good one...Old Dog...

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post #8 of 9 (permalink) Old 05-26-2009, 02:45 PM
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This is just my experience, and I don't think I've ever read any scientific study to back this up, but... In owning scads of vehicles over all my years, I've seen that when you let a car battery drain down to dead, something happens to it. No matter how you treat it or how new it is, give it six months and it will not take a full charge anymore. I don't know why, but I can tell you every instance I've left my lights on in my life and I was buying a new battery in a few months. How it relates to the MF motorcycle batteries, I have no idea, and I don't want to worry you, but I'd keep an eye on it.

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post #9 of 9 (permalink) Old 05-26-2009, 02:49 PM Thread Starter
 
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That's very interesting. I will have to wait and see when I get home from work tonight if it has seemed to lose any charge when starting up. I'll keep my fingers crossed that this experience hasn't ruined the long-term power of the battery, but I guess only time will tell... Thanks for the replies guys
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