KLR 250 won't run on new battery. - Kawasaki KLR 650 Forum
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post #1 of 14 Old 10-18-2012, 01:21 PM Thread Starter
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KLR 250 won't run on new battery.

I'm new here and hate for my first post to be a question, but I am having a problem that is wierd to say the least. I have several bikes, a Super Sherpa and a 1999 KLR250 are among them. I have been riding the Sherpa all summer because the battery was stone-dead in the KLR and made it a little harder to start and I just hate riding it with a bad battery which had been in there for 3 or 4 years. The other day I bought a new battery for it, charged it up like I've done many times and, started it up. It would run but when I gave it gas it would just die...old gas, I thought. I then went through the carb cleaning it out but found it to be a lot cleaner that I'd expected. Put it all back together, same problem. So, on a whim I stuck the old super-dead battery back in it, and it runs just fine (except for the usual signs of a dead battery...dim lights at idle etc.) I then tried a known good battery from one of my other bikes and the KLR wouldn't run on it either, only idle. Old battery back in, runs just fine. What in the world is going on here? Any ideas?
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post #2 of 14 Old 10-18-2012, 08:13 PM
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I hate to say this...but first thought was that you might have the + and - wrong.
My next guess is a bad connection on the batt cable and maybe the odds that it just matched up with the batt change. What year is the KLR?
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post #3 of 14 Old 10-18-2012, 10:22 PM Thread Starter
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Originally Posted by RLF View Post
I hate to say this...but first thought was that you might have the + and - wrong.
My next guess is a bad connection on the batt cable and maybe the odds that it just matched up with the batt change. What year is the KLR?
That was my first thought as well. I double and triple checked the polarity. Strange it runs fine with the bad battery.
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post #4 of 14 Old 10-19-2012, 07:06 AM
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Check your new battery with a volt meter and verify that it's actually putting out juice and not a dead short..

Simple stuff first.
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post #5 of 14 Old 10-30-2012, 09:15 PM
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So, if I understand this, the bike will run on old batt, but not on brand new batt.
So, take new batt back off, put old batt back on, and bike runs.
Then as a test, take off old batt again, put on a known good, but different bat, bike will not run.
Take off known good batt, put original batt back on, bike runs.

Weird, indeed...hmmmm...I've got nothing.

Sorry. But I'm subscribing...maybe I'll learn something.

Good luck..and be sure to post the solution when you figure it out.
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post #6 of 14 Old 05-16-2013, 07:31 PM
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Hey Eddie, I'm new to the forum and just saw this thread... did you ever figure this out? Such a strange problem... In my experience, strange electrical problems can often be traced to a bad ground somewhere, or a short. I can't tell you how the symptoms are happening but I have seen some strange things happen with a bad ground... running/bogging down problems.

so the first place I'd look is the negative to chassis ground connection(s).

- Ian
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post #7 of 14 Old 05-16-2013, 07:40 PM
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This thread's kinda old; despite the well-intentioned advice of the now-long-gone Paper, the KLR250 ignition has NO CONTACT WITH THE BATTERY CIRCUIT WHATSOEVER; instead, the ignition is powered by alternating current from the exciter coil of the stator . . . not unlike Generation 1 KLR650s . . . thus, the battery's condition or even its existence is of no consequence in running the engine of a KLR250, as far as I can tell.
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post #8 of 14 Old 05-16-2013, 09:47 PM
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there's a ghost in that machine, salt the gas tank and burn the frame. that should shut it up.

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post #9 of 14 Old 05-17-2013, 05:59 PM
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interesting damocles... i still wouldn't rule out a bad ground or short. or a ghost.
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post #10 of 14 Old 05-17-2013, 07:36 PM
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Originally Posted by ilmontgo View Post
interesting damocles... i still wouldn't rule out a bad ground or short. or a ghost.
The kill mechanism, both ignition switch and kill switch, is a short-to-ground of the exciter coil.

Academic discussion, I imagine; the thread-starter may have moved on . . . 10-18-2012 his last post date.

Last edited by Damocles; 05-17-2013 at 07:39 PM.
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