is it my starter or my battery - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 13 Old 03-15-2011, 11:49 PM Thread Starter
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is it my starter or my battery

I have an 07 wee and over the winter or prolonged storage i keep my bike plugged into a battery tender JR. I replaced my stock battery last year with a maint free battery from advance autoparts. I have been noticing that if my bike is parked outside 30-40 deg (5 hours) that it barely starts as if the battery has lost charge or is it the starter going bed drawing way too much power?
if the weather is a little warmer it starts a little faster. at idle the voltage is just over 14 volts so i know my stator is working fine. when i check the battery after riding the voltage holds around 12.7 volts after a few hours. i do know that typically my engine will start slower in colder weather, but the first 30k miles i never had this issue. i now have 36k.

is it possible my battery just isn't the best quality?
what is the CCA of the stock oem battery?

also does anyone have any experience w/this battery?
Motobatt AGM batteries

I can't believe i forgot the trophy girls names.

2007 fast blue dl650

Last edited by longgreensilverado; 03-15-2011 at 11:59 PM.
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post #2 of 13 Old 03-16-2011, 01:25 AM
 
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Quote:
Originally Posted by longgreensilverado View Post
is it the starter going bed drawing way too much power?
Motobatt AGM batteries
It's not the starter drawing too much power from going to bed. Did you use a generic charger/ battery tender? If so it probably over charged the battery and burned out a couple cells lowering the charge it can hold.

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Last edited by Buildit; 03-16-2011 at 01:28 AM.
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post #3 of 13 Old 03-16-2011, 08:11 AM Thread Starter
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i used a "battery tender JR" brand not the chaep harbor freight copy. when i set the battery up I let the battery sit for 10 hours, then charged with a 1.5 amp/hr trickle charger for the time stated in the snstructions.

I can't believe i forgot the trophy girls names.

2007 fast blue dl650
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post #4 of 13 Old 03-16-2011, 08:52 AM
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Quote:
Originally Posted by longgreensilverado View Post
i used a "battery tender JR" brand not the chaep harbor freight copy. when i set the battery up I let the battery sit for 10 hours, then charged with a 1.5 amp/hr trickle charger for the time stated in the snstructions.
I used the same battery tender on a bike all winter some years ago.The battery was completely dry the next spring.
I don't trust them anymore.I just charge once a month now.

09 DL650 ABS ORANGE "Form over function at a superior price"
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post #5 of 13 Old 03-16-2011, 09:51 AM
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Quote:
Originally Posted by longgreensilverado View Post
i used a "battery tender JR" brand not the chaep harbor freight copy. when i set the battery up I let the battery sit for 10 hours, then charged with a 1.5 amp/hr trickle charger for the time stated in the snstructions.
Dare I say one more time that AGM battery technology is different than the older lead acid. You can read about them at MF battery technology You say "when I set the battery up" which I interpret to mean that you commissioned it, the article above will possibly explain why the battery has failed. The battery should have a warranty on it, and if push comes to shove, you should be able to get another one since you followed the instructions explicitly. Dare I say again that these MF AGM batteries need a SMART charger to commission and maintain them. I see that you used a charger that claims this ability. You may have just got a dud battery. Some of the more expensive SMART chargers will tell you that a battery is a dud or has reached it's life span. I have the original battery MF in my 07, and it still passes a load test. Here is some good info on battery testing http://autorepair.about.com/library/.../aa101604c.htm

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Last edited by honest bob; 03-16-2011 at 10:03 AM. Reason: added text & link
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post #6 of 13 Old 03-16-2011, 10:31 AM
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IMHO 12.7 volts is normal for a battery sitting overnight. I suggest you have it load tested.

DL650A K7
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post #7 of 13 Old 03-16-2011, 12:43 PM
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Quote:
Originally Posted by longgreensilverado; first 30k miles i never had this issue. i now have 36k.

is it possible my battery just isn't the best quality?
what is the CCA of the stock oem battery?

also does anyone have any experience w/this battery?
[url=http://www.murphskits.com/catalog/product_info.php?products_id=406
Motobatt AGM batteries[/url]
To answer these questions; The CCA of the OEM is 10a.
It is possible you got a dud. Most batteries manufactured as MF are good quality.
The Motobat has two sets of output/input terminals. That could be advantageous. The price is good.
Did your original battery suddenly quit, or did you just decide to replace it?

ADVENTURE, like beauty, is in the eye of the beholder.
The destination, can be the journey! Honest Bob

Last edited by honest bob; 03-16-2011 at 12:55 PM. Reason: added text
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post #8 of 13 Old 03-16-2011, 02:46 PM Thread Starter
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my original battery died after sitting for a few months in the bike not being used. I recharged it , but it never really came back to it's full potential so I changed to a new one. I've set up many batteries and never had this issue before especially w/this bike. it's only on cool days that i notice the bike starts slow. or starts, but just barely before the compression of the cylinder sends the piston back the other way either because the battery is low or the starter is drawing too much power after the fuel pump runs for a second.

once the bike is hot and running i have no issues. i could do errands around town and start stop many times without issues.

I can't believe i forgot the trophy girls names.

2007 fast blue dl650

Last edited by longgreensilverado; 03-16-2011 at 02:56 PM.
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post #9 of 13 Old 03-16-2011, 04:42 PM
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Read the voltage when cranking. Mine is as follows:
Morning voltage 12.7
Key on voltage 11.9 (lights on)
Cranking voltage 9.6 to 10.2 depending on cold or warm
Voltage after start 14.2 to 14.4

I have a Battery Bug monitor and it tells me my battery is at 60%...when it drops to30% the monitor will display a warning and at 10% it will give sound an alarm warning me to replace the battery. I expect at least another year based on this information and my K7 battery is original.

DL650A K7

Last edited by StromTech; 03-16-2011 at 10:34 PM.
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post #10 of 13 Old 03-16-2011, 04:50 PM
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[QUOTE=longgreensilverado;662759]my original battery died after sitting for a few months in the bike not being used. I recharged it , but it never really came back to it's full potential so I changed to a new one. I've set up many batteries and never had this issue before especially w/this bike. it's only on cool days that i notice the bike starts slow. or starts, but just barely before the compression of the cylinder sends the piston back the other way either because the battery is low or the starter is drawing too much power after the fuel pump runs for a second.

Somehow that sounds like something else??? What oil viscosity are U using? Can you do a voltage check across the battery terminals as the starter is trying to start the bike under the conditions U described? Possibly your starter switch is not passing full voltage due to contact failure/erosion/dirt. See this post https://www.stromtrooper.com/v-strom-...er-button.html
Also see greywolf's advice to install a relay. https://www.stromtrooper.com/v-strom-...failure-2.html

ADVENTURE, like beauty, is in the eye of the beholder.
The destination, can be the journey! Honest Bob

Last edited by honest bob; 03-16-2011 at 05:06 PM. Reason: added link
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