battery not holding charge???

[fzr kev]

my battery is not holding its charge,the battery is getting charged because it starts fine once its running,come to it in the morning and its flat again?i have gone through 2 batterys in the past 2 months,can any 1 point me in the right direction?

[Siheinz]

Voltage regulator? is a write up about it in the wiki

[FZRDave91]

Could be several things. Id get a meter and make sure the charging system s doing its job while running. If it is, then you might have something that is shorting out while the bike is off that is drawing from your battery while it is off. Try disconnecting your + post when you are done riding for the day and see if that fixes your problem until you find out what is really going on. That will keep anything from drawing your battery down while you are away.

One more thing to check for is if your battery is good. It might take a charge, but if it wont hold the charge over time then it is probably the problem. You could use the method I mentioned above to check for this too... ie charging your battery and leaving it disconnected for a day or two and then hooking it up and seeing if it will start your bike or not.
However, if you want faster results you can take it to your local motorcycle shop and ask them to test it for you. We do battery tests for free at mine, and most shops I know of do it for free too.
I hope this helps.

[sweekster]

http://fzronline.com/wiki/doku.php?id=v ... flow_chart

Click there...Could be useful. I'd say you could have 1 of a few issues.

Could be you have a dead dead dead battery.
Could be you have something draining the battery after you shut the bike off
Could be you have a bad VR which can either cause your battery to be be over charged, thus killing the battery, or it's so dead that it's no longer doing anything which will also kill your battery.

[DonTZ125]

Make sure you don't have a snail trail of crusty gunk between your terminals; even a thin layer can conduct, bleeding down the charge.

[crowe]

could be...

alternator?
reg rec?
alarm/imobiliser?
battery?
heated grips left on?

does the headlight get brighter from when you rev to a few thousand rpm?
how long for the battery to die after leaving it?