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post #1 of 29 (permalink) Old 06-24-2009, 05:52 PM Thread Starter
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Battery Dead after riding

2005 vn 750 new interstate battery bought last year 8 months old and had on tender . Yesterday rode back home from work and stoped to get gas and whould not start , had to roll off, I was tired as it was. Now getting ready to go back to work and driving the truck. All stock , no mods done. Please help. thanks. Cranked up just now after siting for 6 hours but dont trust it. working 12 hour swing shifts so dont have the time to work on right now. mf battery

Last edited by tickman; 06-24-2009 at 05:59 PM.
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post #2 of 29 (permalink) Old 06-24-2009, 06:17 PM
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It could be a lot of things. I would double check all connections, battery terminals, grounds etc. make sure they are tight and clean. If you don't have a voltage meter, you'll need one. Test the battery voltage after its charged. Should be around 12.5 volts. Start the bike and test the voltage at battery, and while revving the bike up to around 4k. Voltage should run up to around 14 volts or better. If it does your charging system seems ok. Battery its self might be a bad one. It has happened, even with an MF. Report back with as much info as you can! good luck!

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post #3 of 29 (permalink) Old 06-24-2009, 06:22 PM
 
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What kind of battery tender have you been using?
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post #4 of 29 (permalink) Old 06-24-2009, 06:23 PM
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How old are the plugs, and are they iridium? Lots of folks have said their hot starting problems went away with MF battery and iridiums. Hope you get it sorted out soon.

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post #5 of 29 (permalink) Old 06-24-2009, 06:43 PM
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If you shut off the bike, went into the store and came back out and hit the starter and nothing, battery dead, then this is not really the "hot start" problem you read so much about here. The hot start problem happens when the battery (wet cell) has just enough juice to turn the starter, but not enough to do that and give the plugs a hot enough spark to fire the cyl's. It could be a bad MF battery, but I don't think this is the hot start problem, unless he didn't explain it quite right!

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post #6 of 29 (permalink) Old 06-24-2009, 06:48 PM
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Quote:
Originally Posted by tickman View Post
2005 vn 750 new interstate battery bought last year 8 months old and had on tender . Yesterday rode back home from work and stoped to get gas and whould not start , had to roll off, I was tired as it was. Now getting ready to go back to work and driving the truck. All stock , no mods done. Please help. thanks. Cranked up just now after siting for 6 hours but dont trust it. working 12 hour swing shifts so dont have the time to work on right now. mf battery
This.......Battery

http://cgi.ebay.com/ebaymotors/Deka-...5%7C240%3A1318

And these.......Plugs

http://cgi.ebay.com/ebaymotors/FREE-...5%7C240%3A1318

You won't regret it.

JaY



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Stock Seat Repadded
Ext-BackRest

Last edited by jthill524; 06-24-2009 at 06:51 PM.
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post #7 of 29 (permalink) Old 06-24-2009, 08:27 PM
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I have to go along with Fergy's suggestions in his first post. Get a voltmeter and check out your charging volts and battery volts.

If you simply could not start the bike..(meaning it turned over but never caught) and you then simply wore the battery down till it was dead.. that is one thing. And if you tried to start the bike and the battery was already dead (meaning it would not even turn over) thats another thing.

The only way to know is , after checking all your connections as fergy suggested, you measure the charging volts and the state of charge of the battery fresh off the tender.

Your statement that you - " had to roll off .." if that means you were able to jump start the bike, I would doubt your charging system is the problem and the issue might just be a bad battery. (as you did not say how many attempts you went through trying to start it..just that it would not start)

Or does - " had to roll off.." mean you pushed the dead bike home?


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post #8 of 29 (permalink) Old 06-24-2009, 09:08 PM
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Also, hook up a volt meter, note the reading of the battery when fully charged. should be 12.5 volts , Then, while watching the meter, try and start it. While the starter is enganged, the meter should not drop below 10 volts, if it drops more, the batter is bad.

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post #9 of 29 (permalink) Old 06-24-2009, 09:10 PM
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Quote:
Originally Posted by flitecontrol View Post
How old are the plugs, and are they iridium? Lots of folks have said their hot starting problems went away with MF battery and iridiums. Hope you get it sorted out soon.

the iridiums will work NO better than your standard ngk plug. the purpose of the iridium. and platinum as well, is the longevity of the plug. the spark is no different.

1986 Vn750
18,800 miles, and counting
Bone Stock
New cam chain tentioners
all fluids changed
Spline Lube
windshield
Engine Guard
B-stone S11 RWL-stock sizes
*wanted*
New grips

2001 Vn750
13,100 miles, and counting
spline lube
Bridgestone S11 100/90
Shinko 170/80
rear end oil change
aftermarket mirrors
windshield
otherwise all stock
*anticipated mods*
Engine Guard
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post #10 of 29 (permalink) Old 06-24-2009, 09:50 PM
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Quote:
Originally Posted by 1986vn750 View Post
the iridiums will work NO better than your standard ngk plug. the purpose of the iridium. and platinum as well, is the longevity of the plug. the spark is no different.


Incorrect.


The tiny size of the electrode on the iridiums actualy produces a hotter spark. And because of the size and longevity of the electode, the spark will stay "hotter" longer than ordinaary plugs.

Granted, a brand new set of regular spark plugs more or less would be equal to a set of iridiums. But after just 2,000 miles the electordes on the regular plug would have deteriorated enough that they could no longer be comparable to the iridium plugs in spark intensity.

This is the reason they are in fact better, and it is solely because of their longevity.


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