yet another m/f battery question! - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 13 (permalink) Old 09-28-2008, 07:30 PM Thread Starter
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yet another m/f battery question!

I bought a m/f battery yesterday from autozone. bike fired right up. just out of curiosity I threw it on the charger last night thinking who knows how long and if it lost any charge sitting on the shelf. this morning it was fully charged. drove it to work and back (25 mile round trip) and threw it on the charger when I got home. my chargers orange light is on which means it is taking a charge. does this sound normal? I just put it on there so I'm not sure how long it will charge but my lawnmower m/f battery is 4 years old and when I plugged it in for the first charge ever it was already fully charged and a green light on my charger. does this sound normal or should I check my charging system?
on my old battery when I revved the engine my lights got a little brighter but with the new battery it doesn't seem too if that matters!

1986 vn 750 aka "Huck Farley"
42,000 miles
Rick's stator and rr
Tuxedo stator cover mod
pickup coil mod
dampers replaced
agm m/f battery
Harley sportster exhaust, degoated
Hid conversion
splines lubed
custom "vn750.com" grill cover
NGK Iridium spark plugs


acct to mcct mod https://www.vn750.com/forum/showthread.php?t=17917

rekeying locks, https://www.vn750.com/forum/showthread.php?t=7309

stator replacement walkthrough, https://www.vn750.com/forum/showthread.php?t=11369
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post #2 of 13 (permalink) Old 09-28-2008, 08:00 PM
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Any time I put my MF battery on a the charger the "charged light" came on within minutes, if not seconds. I pretty much never bothered to use the charger anymore... and never had a problem.

So not real sure why you even put yours on a charger to start, but I would say the only way to check your charging system is to use a voltmeter when the bike is running and not take the word of a orange light on a battery charger.

MF batteries do have a history of going bad..(most here seemed bad at delivery) But the only way to tell is the trial by fire and just ride the bike , leave the charger out of the picture and see what happens.

You can get the battery load tested where you got it if you think it might have a problem.

My Westco lasted 5 years, was only put on a charger 2 times in it's life and still started the bike up first try the day I sold it....but as you may have read the other posts, these things can go bad.


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post #3 of 13 (permalink) Old 09-28-2008, 09:17 PM Thread Starter
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Quote:
Originally Posted by Knifemaker View Post

So not real sure why you even put yours on a charger to start, but I would say the only way to check your charging system is to use a voltmeter when the bike is running and not take the word of a orange light on a battery charger.




KM

just being cautious, its the only ride I have right now except when my wife is off and not using my truck as her van is broke down. I work early mornings and have to open a cvs pharmacy as I am usually the only one to open and the crew cannot get in without me. job kinda depends on the bike at the moment plus I hate missing work more than anything, and I'm salary. do you think I am okay, hell with the bike!

1986 vn 750 aka "Huck Farley"
42,000 miles
Rick's stator and rr
Tuxedo stator cover mod
pickup coil mod
dampers replaced
agm m/f battery
Harley sportster exhaust, degoated
Hid conversion
splines lubed
custom "vn750.com" grill cover
NGK Iridium spark plugs


acct to mcct mod https://www.vn750.com/forum/showthread.php?t=17917

rekeying locks, https://www.vn750.com/forum/showthread.php?t=7309

stator replacement walkthrough, https://www.vn750.com/forum/showthread.php?t=11369
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post #4 of 13 (permalink) Old 09-28-2008, 09:36 PM
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I have a battery tender and each time I connect my M/F or other battery to the charger, the light comes on indicating that it's charging. After a short while the light indicates a float charge, meaning it's fully charged. It isn't necessary or helpful to charge your battery frequently, especially if you're not trickle charging it. Get a voltmeter and check the battery charge monthly. If it gets below 12.7 when the bike is off, charge it if you wish, but PLEASE USE A TRICKLE CHARGER, no more than 2 amps, preferably less. Best to use a trickle charger that will automatically shut off when the battery is fully charged.

Rubyrick

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'05 VN750
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DEKA M/F battery
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Clear Alternatives LED brake light
Cortech mini tank bag on rear rack
Pirelli MT66 Tires: 110 front / 150 rear
Splines lubed when tires installed at 10,650 miles
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post #5 of 13 (permalink) Old 10-06-2008, 05:26 PM Thread Starter
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okay help!!!! just put in the m/f battery and fine for a couple weeks now its not wanting to start the bike again. had to push start after work today.
This morning it started fine but died at the bottom of my driveway. tried to restart and it acted kinda flooded but finally started after choking it again but ran the battery kinda low. at work ran to the bank and back then when I went home I stopped at a store and it acted kinda flooded again. A couple tries to start and it killed the battery to where it would not crank.
Anyone know where I should start. battery is charging now. I replaced the plugs and cleaned the oil filters when I put the new battery in. any help would be great!!!!!!!!!!

1986 vn 750 aka "Huck Farley"
42,000 miles
Rick's stator and rr
Tuxedo stator cover mod
pickup coil mod
dampers replaced
agm m/f battery
Harley sportster exhaust, degoated
Hid conversion
splines lubed
custom "vn750.com" grill cover
NGK Iridium spark plugs


acct to mcct mod https://www.vn750.com/forum/showthread.php?t=17917

rekeying locks, https://www.vn750.com/forum/showthread.php?t=7309

stator replacement walkthrough, https://www.vn750.com/forum/showthread.php?t=11369
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post #6 of 13 (permalink) Old 10-06-2008, 05:42 PM
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Have you used a volt meter ane checked the voltage with the bike running at close to 2500 rpm.
It should be close to 14V.
If not you may have a R/R or a stator problem.

Chad Falstad "Hawk"
Vroc #17649
2011 HD Ultra Classic "angel"
2001 Nomad 1500 Sold March 2012
2001 VN 750 "Sold June with 2008 with 21,000""Serinity"
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post #7 of 13 (permalink) Old 10-06-2008, 06:20 PM
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You might have a problem unrelated to the battery.

But just to clear this up..someone asked me a few days ago about MF batteries, as I posted that one should get a MF AGM battery. The question was about the difference here as a MF battery may not be a AGM battery..so here is my reply:
---------------------------------------------------------------------------

From what I understand , there can be a difference in a battery that simply says "maintance free" and one that is a AGM battery. AGM, Absorbed Glass Mat , does however still use battery acid. The differennce it that once filled, the the liquid is held in the "glass mat" just like water in a sponge, and would not leak out if there as hole in the casing.

The Westco , which I still recccomned and the Yussa some use are AGM batteries. If I remember correctly the Westco comes pre filled and charged. The Yussa , if shipped to your home, comes with a seperate container of acid solution you have to put in the battey yourself.

I am not familar with the Sears Gold batteries, but if buying a battery for my bike I would sure check to see if the battery is in fact a AGM type battery.

I have noticed some confusion in the group on how these batteries work and how they are made. They are not "dry cells" or 'gel" batteries.
I think at one time I posted this:
http://en.wikipedia.org/wiki/Absorbed_Glass_Mat


A "Gel" battery is in fact a real item, but do to it's finicky charging requirements , it would be a poor choice for a motorcycle battery unless the bike were specificly wired for one:

http://en.wikipedia.org/wiki/Gel_Battery


So, I have a Maintance Free battery in by car, but it is just a regular wet cell that has the cell caps covered. It has a reservoir that holds extra electolyte so one doe not need to fill the cells...thus it is called "maintance free" :

http://www.carquest.com/partsBatteryMainFree.html

Doe to the design, I think it would be hard to make a motorcycle battery like this, as the size would limit the amount of space for the reservoir , but I'm not 100% sure on this.
But from the Sears site:
"DieHard Gold PowerSport Battery featuring AGM technology may also be used for Motorcycle, All Terrain, Snowmobile, Watercraft and Lawn & Garden"

http://tinyurl.com/4nr4eh


So it appears that this particular battery is a AGM.

But when it doubt, ask.

-------------------------------------------------------------


So, do make sure the autozone battery you bought is in fact a AGM battery..not just a "Maintance Free" one...


KM

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post #8 of 13 (permalink) Old 10-06-2008, 06:24 PM
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Quote:
Originally Posted by wib714 View Post
okay help!!!! just put in the m/f battery and fine for a couple weeks now its not wanting to start the bike again. had to push start after work today.
This morning it started fine but died at the bottom of my driveway. tried to restart and it acted kinda flooded but finally started after choking it again but ran the battery kinda low. at work ran to the bank and back then when I went home I stopped at a store and it acted kinda flooded again. A couple tries to start and it killed the battery to where it would not crank.
Anyone know where I should start. battery is charging now. I replaced the plugs and cleaned the oil filters when I put the new battery in. any help would be great!!!!!!!!!!
Have you pulled the plugs today to see if they are wet from flooding? (Please only after engine has cooled off, you don`t want to strip the s.p. threads out of an aluminum block by screwing them out hot).

I have been reading some threads about syncronizing the carbs but do not know how much that might affect the hard starting problem we have.

It seems that others here have found that installing a voltmeter is the only way to monitor battery condition while riding. Did you happen to check battery voltage today before hooking up the charger? If/WHEN it happens again, you might check the voltage as soon as you shut off the bike and again in 15 or 30 minutes. Mine will often start again after a short time if I shut it off hot, and then run the battery down trying to restart too soon.

FWIW I don`t know if any of this helps, but maybe sparks an idea from somebody.

I know how you feel when you are counting on the bike to get to work and the danged thing won`t start or keep running. Good luck in finding a simple and inexpensive solution.

Gordon

1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
https://www.vn750.com/forum/11-vn750-general-discussion/9127-top-ten-items-you-would-suggest-new-owner-do-his-new-ride.html

Last edited by OlHossCanada; 10-06-2008 at 06:39 PM. Reason: incomplete
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post #9 of 13 (permalink) Old 10-06-2008, 06:53 PM
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My guess is that your charging system is hosed. Check the voltage to the battery while running at about 3K. Should be typical 13+ volts. Either the regulator or stator is going out. When were they replaced last?

2000 A16
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$65 leather saddle bags
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relocated R/R
de-badged
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post #10 of 13 (permalink) Old 10-06-2008, 07:55 PM
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Without the voltmeter tests while the engine is running, all speculation is just that, speculation. Once we get numbers, we will be better equipped to answer your questions. Based on your description, I would speculate that it is NOT directly spark or fuel related. I do suspect your charging system.

Jim W
93 VN 750 "Ursula"
Moved R/R 08Sep06
R/R rewire 17Feb07
New R/R, Installed 14Jun08
New Stator installed 10 Jun08
Maintenance Free Battery 12Jan08
21480 Miles
VROC #8542
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