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110cc Pocket Bike Battery Not Charging

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Old 06-04-2012, 11:59 PM
reece9944's Avatar
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Default 110cc Pocket Bike Battery Not Charging

Hey just wondering if someone could help me out,

I've fully charged my brand new battery, It starts the pocket bike and I drive to my buddy's place, but then won't have enough power to turn the starter over to get home, so I end up jumping it off of their truck.

I have replaced the stator, cdi, and regulator already.
No fuses are blown.
It is a 110cc Automatic engine.

I dont know what else the problem could be. I'm done with this crappy chinese wiring already.

Thanks, Reece.
 
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Old 06-06-2012, 11:03 PM
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How long (in minutes) is the drive to your buddy's place? Do you have a head light on the pocket bike? Was it on during this drive?

A fully charged good battery should be able to run the quad all day with a dozen starts as long as you aren't running headlights - even of your battery charging system isn't charging the battery at all.

So we're down to the battery being bad (won't hold a charge), or something is actively draining the battery while you're riding.

You said there are no fuses blown (implying that you have more than one?) I would be very surprised if you had more than one. What is the value of that fuse? The reason I ask is that you have a new battery that discharges quickly (you're going to tell me "how quickly" in minutes as asked above). If your battery is going dead in less than an hour then I have to wonder why your fuse isn't blowing, since draining a battery that quickly takes a *lot* of current - a lot more than a fuse should allow without blowing.

Let's start with these questions and then branch out from there. You're going to need to get a meter at the ready...
 
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Old 06-06-2012, 11:29 PM
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About 15 minutes to get there, no headlight is on, all I have is a voltage gauge which was turned on. And sorry, there's only one fuse from the regulator to the (+) on the battery. I stay for around 3 hours then go to leave. I just exchanged my new battery for another one and it seems to last now. The voltage while Idling is around 14.5 volts, 13-16 volts at high idle, and 13.2 while not running.
 
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Old 06-08-2012, 12:01 AM
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Originally Posted by reece9944
...I just exchanged my new battery for another one and it seems to last now. The voltage while Idling is around 14.5 volts, 13-16 volts at high idle, and 13.2 while not running.
So the old bad battery was discharging itself - that explains why the fuse didn't blow.

I don't like the 16 volts at high idle. That is *way* too high. Your new battery life will be compromised if you are always charging at that rate. But I also have to wonder if your meter is bad. 13.2 volts at the battery terminals when the engine isn't running is also too high. Batteries not being charged by a running engine, or a charger, just don't read that high. But that high reading isn't high enough to explain the overcharging voltage that you measured.

Do you still have your old regulator? I would repeat the tests, and then repeat them again with the old regulator and report back the results. Do you have access to another meter? If so, I would try that too.

Something isn't good here, and I don't know at this point if it is measurement error, a bad meter, or a bad charging system.
 
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