J
JEEPRUSTY
Guest
My Battery Voltage drops to 5 Volts when cranking yet the bike charges fine at a mid 14 volts.
Is it time for a new battery?
Is it time for a new battery?
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wacky941
Forum Mentor
Take a reading without the motor running and ignition turned off, then take one with the ignition turned on (do not push the start button).
If it reads less than 11VDC with ign off or 10.5VDC with ign on (no button pushed) first thing is to check the water level of your battery, if thats normal it's time to buy a new battery.
If it reads less than 11VDC with ign off or 10.5VDC with ign on (no button pushed) first thing is to check the water level of your battery, if thats normal it's time to buy a new battery.
Are you measuring 5V right at the battery terminals. If so I suspect the engine is not cranking very well. If not then there may be voltage drops in the wires to the starter.
As long as the engine turns over well, I would not worry about it as this is a little difficult to actually measure the voltage under cranking when the voltage is changing fast.
If you had a oscilloscope and it was dropping to 5V at the battery terminals that would be another thing.
I'm having an issue at the moment of hard cranking with my GS750. Even after swapping out a better battery and charging for 24 hours it still will hardly crank. Im starting to think I have some corrosion buildup in the main power leads because it will barely crank. Gota get the volt meter out......... now where did that thing go.
The way I will proceeed is to measure voltage right at the battery center posts. If it doesnt drop and I have poor craanking then i have bad conenctions.
J
JEEPRUSTY
Guest
I measured from the battery posts.
Here goes another c note for a battery
Here goes another c note for a battery
K
koolaid_kid
Guest
Get one of these: http://www.thegsresources.com/_forum/showthread.php?t=161155
Only 2/3 of a C-note, and should last for a while. My last AGM lasted almost 7 years, and was much more expensive.
Only 2/3 of a C-note, and should last for a while. My last AGM lasted almost 7 years, and was much more expensive.
