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Post by flyawaydoug on Jun 4, 2014 10:50:59 GMT -5
I looked for another thread and didn't find one. I hope I'm not duplicating an existing discussion. My battery is not charging. With the bike running, voltage at the battery is 12.3~4. Revved to 4K and there was no change. I expect to see 13+ volts if the stator is working correctly. Once started the bike will run with the negative terminal disconnected. This would indicate that the stator is doing something. I've had the battery load tested and it passes. After a short ride, the battery is dead and won't start the bike. The fact that it runs with the battery disconnected confuses me. I've ordered a voltage regulator and a stator. I hope I'm on the right track.
I have the 257cc Yamaha engine.
I have upgraded the headlights to HID. It ran well for a while after the upgrade, so I don't think anything is wrong with that.
Is there anything else that I should be looking for? |
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Post by richardthescooter1 on Jun 4, 2014 11:39:35 GMT -5
Hi flyawaydoung, welcome to the forum. You could have a bad diode, if its open or has a bad connection it won't charge battery, the current goes through the R/R to the diode to the battery.
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Post by richardthescooter1 on Jun 4, 2014 12:28:54 GMT -5
An easy way to check for this is to pull apart this connector (diode) and get a heavey wire and jump the two pins on the wiring harness side. if you get a charging voltage on the battery, then the diode is the culprit  |
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Post by urbanmadness on Jun 4, 2014 12:32:21 GMT -5
and don't run it without that negitive on the battery. It is a good way to burn up the REG/REC.
When you jump the diaode... the headlight will come on as well.
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Post by flyawaydoug on Jun 5, 2014 10:09:23 GMT -5
Thanks all! I will post what I find out this weekend when I tear into it.  |
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Post by flyawaydoug on Jun 7, 2014 18:44:23 GMT -5
Here's what I have found so far. Initial battery voltage is 12.13 (needs to be fully charged but adequate for the test). Scoot started with no problem. Battery @ 2000rpm is 12.18v Battery @ 5000rpm is 12.31v Installed new R/R. Tested the diode. Correct polarity shows a 0.4v drop which is what I would expect. Reverse polarity shows open, also what I would expect. Started the scoot and got the same voltage results as above. Disconnected the diode and shorted the connector. Lights came on (expected). Scoot started. Same voltage results as above again. Is there a way I can test the AC voltage from the stator before I tear into it to replace it? Have I missed anything?  |
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Post by flyawaydoug on Jun 7, 2014 18:48:08 GMT -5
One thing I left out. At the end I disconnected the negative terminal. The scoot continued to run normally. This should tell me that the stator is enough voltage to run the scoot. Correct?
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Post by alleyoop on Jun 7, 2014 18:50:45 GMT -5
Yes, but running with the battery disconnected all that means is that your CDI is AC powered and not DC powered. And yes there are tests you can make to determine if the stator is your problem causing the no charge. Have to look them up in the tech section.
Does yours have 3 YELLOW WIRES?
Alleyoop
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Post by alleyoop on Jun 7, 2014 18:59:30 GMT -5
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Post by jerseyboy on Jun 7, 2014 21:33:01 GMT -5
You should see about 65-  AC volts coming from the stator while cranking the motor with on switch in the off position.On most scoots it should be the red wire next to the black one on the two way plug at the top of the CDI,,the black one next to the red goes to the on/off run switch..if you see .16-.25 AC volts thats more than likely the wire that goes to the pick up coil. Here is the video I posted,,i really like this video as the dude shows some values to look for as well,,he cover it all pretty well..I know its for a 150 but the readings will be pretty much the same,,just have to figure out your configuration.. |
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Post by flyawaydoug on Jun 7, 2014 22:36:47 GMT -5
OK. I have traced the problem. It is the HID head light upgrade. I disconnected the battery feed to the headlights and my battery voltage jumped to 13.6v @ 3500rpm. So, I will either restore the original headlights or add a switch to the HID. I am leaning to the latter. The original headlights are not strong enough to safely ride at night above 25 mph. This should be a warning to all the others considering the HID headlights. Terrific responses from everyone. BIG THX!  |
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..BAD TO THE BONE..
AC volts coming from the stator while cranking the motor with on switch in the off position.On most scoots it should be the red wire next to the black one on the two way plug at the top of the CDI,,the black one next to the red goes to the on/off run switch..if you see .16-.25 AC volts thats more than likely the wire that goes to the pick up coil.