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Forum LongTimerGSResource Superstar
Past Site Supporter
Super Site Supporter- Mar 2006
- 35682
- Torrance, CA
Battery Health?
So what is a good no-load battery voltage for a typical lead/acid GS battery? Mine is putting out about 12.5 volts with a fresh charge (not surface charge) and when turning on the ignition key (head lamp on, etc) the voltage drops to about 11.8 volts. Tested the battery using one of those low tech float ball battery testers and it says the battery is fine but I'm not so sure.Ed
To measure is to know.
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sound like its in a normal range seeing that the headlight and all is now energised. What does it drop to while you crank it?MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550
NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.
I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.
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Sounds a little low when the key is on, but not that bad.
As Chuck asked, what's the voltage while cranking? You don't want it dropping lower than 10.
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Originally posted by Nessism View PostSo what is a good no-load battery voltage for a typical lead/acid GS battery? Mine is putting out about 12.5 volts with a fresh charge (not surface charge) and when turning on the ignition key (head lamp on, etc) the voltage drops to about 11.8 volts. Tested the battery using one of those low tech float ball battery testers and it says the battery is fine but I'm not so sure.1981 gs650L
"We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin
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Forum LongTimerGSResource Superstar
Past Site Supporter
Super Site Supporter- Mar 2006
- 35682
- Torrance, CA
Originally posted by tom203 View PostSounds like my dying battery! off charger maybe 12.5 in ten minutes-too low- and drops to below 12 with ignition on,even with headlight off. Time for AGM battery.Ed
To measure is to know.
Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182
Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846
Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf
KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection
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Forum LongTimerGSResource Superstar
Past Site Supporter
Super Site Supporter- Mar 2006
- 35682
- Torrance, CA
Originally posted by 1948man View PostWhere'd you order from? Direct from Motobatt?Ed
To measure is to know.
Mikuni O-ring Kits For Sale...https://www.thegsresources.com/_foru...ts#post1703182
Top Newbie Mistakes thread...http://www.thegsresources.com/_forum...d.php?t=171846
Carb rebuild tutorial...https://gsarchive.bwringer.com/mtsac...d_Tutorial.pdf
KZ750E Rebuild Thread...http://www.thegsresources.com/_forum...0-Resurrection
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Forum LongTimerGSResource Superstar
Past Site Supporter- Oct 2006
- 13993
- London, UK to Redondo Beach, California
I've had good results with the Scorpion batteries from Battery Stuff. About $60 shipped.
Ed - Can I have your old one to power my 12v impact driver in the garage? (The old one I have their struggles to hold 12v on a fresh charge so yours would be an upgrade!)
Dan1980 GS1000G - Sold
1978 GS1000E - Finished!
1980 GS550E - Fixed & given to a friend
1983 GS750ES Special - Sold
2009 KLR 650 - Sold - gone to TX!
1982 GS1100G - Rebuilt and finished. - Sold
2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!
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