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Old 02-26-2014, 12:28 PM   #1
inkrediblek
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Need Some Help!?!

Hello everyone been a lurker for a long time. But today I need help. i have a 2005 yamaha r1. Its having problems starting. and it seems everyones solution is battery, stator, rectifier. but heres the situation.
The battery is brand new and my voltmeters says it reads 12. something. they bike struggles to start but when i jump it with a car(not running) it starts right up. but after riding i shut it off and it struggles to start again. but eventually if i give her a few minutes she will start up. ive hooked up the volt meter to the battery while it was running and it idled at 14.1. and when i reved it up to 5000rpm it rises to 14.5-14.8. not going over 15 nor droping below 13. So that indicates my stator and rectifier is ok right? and of course the starter relay clicks and buzzes like it should. do i have a weak starter? ANy help would be really appreciated. Ive been stuck for about a week now racking my brains on whats next? Please and thank you in advance!
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Old 02-26-2014, 12:33 PM   #2
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Sounds like a problem with the cca's, maybe a bad battery even though it's new.
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Old 02-26-2014, 12:45 PM   #3
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Seems like you bought a bad batter

You need to test the battery when you are starting it
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Old 02-26-2014, 12:47 PM   #4
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Sounds like a bad battery/bad cell.
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Old 02-26-2014, 12:53 PM   #5
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try charging the battery. They are weak off the shelf. Too weak to take the draw when starting. You needed to check the battery with a load on it
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Old 02-26-2014, 01:39 PM   #6
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That battery has been charged and as of two seconds ago it read 12.7. And cca is at 210......
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Old 02-26-2014, 01:51 PM   #7
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These guys are on the same track of what Im thinking. Take a reading of the battery as u hit the starter button.
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Old 02-26-2014, 02:44 PM   #8
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what reading should i be looking for? Or what should it be at?
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Old 02-26-2014, 02:56 PM   #9
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http://www.atbatt.com/car-battery/ho...-a-car-battery
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Old 02-26-2014, 02:58 PM   #10
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The battery should say what your cca should be at
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Old 02-26-2014, 03:08 PM   #11
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A new battery will read around 13.5 volts, fully charged.
That means each cell should read 2+volts.
Under load, like starting, it should not go much if any below 11 volts.
It sounds like the charging system is functioning but the battery is bad.
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Old 02-26-2014, 03:31 PM   #12
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Seems like your bike is overcharging. I'd check the continuity on the stator rectifier
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Old 02-26-2014, 03:51 PM   #13
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It's also possible you have a bad ground. Check, not only the connections at the battery, but also where the negative cable connects to the frame.
It should be a clean tight connection with no corrosion and no paint.
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Old 02-26-2014, 03:57 PM   #14
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Another suggestion is, if you can get access, jumper directly from the positive battery terminal to the connection on the starter and from the negative battery terminal to the starter case. That removes all the wiring, switches and relays from the issue and directly checks the battery and starter.
Of course you're gonna want to use some fairly heavy gauge wire for that.
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Old 02-26-2014, 04:00 PM   #15
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You can also take the battery to a few places to get it tested for free.
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Old 02-26-2014, 05:34 PM   #16
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Ok so I tested it by starting it and the Volts dropped to 7. Does that mean there's a bad cell in the battery!? Or what's the cause? Y'all are awesome I appreciate everyone's input.
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Old 02-26-2014, 05:42 PM   #17
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Its bad then
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Old 02-26-2014, 06:30 PM   #18
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Yeah bad battery, a battery should not drop under 9.6v during a starter draw test.
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Old 02-26-2014, 06:38 PM   #19
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It has a bad cell.
When it is fully charged it appears to be good, because the other cells make it look that way but when you put a load on it the bad cell dumps and the rest can't carry the load.
Nothing to do but get a new battery.

Sorry I know this wasn't what you wanted to hear but...
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Old 02-26-2014, 06:41 PM   #20
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Try getting it tested at Autozone first. They will charge it then put it under a load test. If u bought the battery and tried using a trickle charger or not charging it at all, could cause the same symptoms.

But if it fails that, then its as these goons say above. Bad cell
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