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Charging issue
#152063
08/14/21 06:14 PM
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Joined: Jul 2021
Posts: 12
OTT
OP
Junior Member
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OP
Junior Member
Joined: Jul 2021
Posts: 12 |
Ok, been out today and done 12 miles , stalled on a tricky climb pushed button and just clicked and then wouldn’t turn over , jumped it and just managed to get home but battery is flat, is a new one , connected multi tester to battery after charging it and I am getting an increased reading when I rev it but not sure what the output should be ?
Any ideas anyone ?
Yamaha xt225 Serow, 94 model just imported from Colorado , showing 2660 miles believed genuine
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Re: Charging issue
[Re: OTT]
#152065
08/14/21 09:55 PM
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Joined: Jun 2013
Posts: 4,153
peejman
Platinum Member
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Platinum Member
Joined: Jun 2013
Posts: 4,153 |
Battery should be about 12.5V when fully charged, about the same when idling, and about 14V at moderate rpm.
This shall pass, be still and know. 2006 XT225, UNI filter, ProTaper bars, MSR handguards, SS front brake line, Shinko 241's.
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Re: Charging issue
[Re: OTT]
#152136
08/22/21 05:10 PM
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Joined: Aug 2021
Posts: 17
Duff Daniels
Junior Member
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Junior Member
Joined: Aug 2021
Posts: 17 |
Run and bump start it. That’ll tell you if it’s the stator or battery. Usually.
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Re: Charging issue
[Re: OTT]
#152142
08/23/21 02:55 PM
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Joined: Dec 2008
Posts: 2,152
JerryH
Platinum Member
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Platinum Member
Joined: Dec 2008
Posts: 2,152 |
I still don't completely understand the XT225s electrical system. The service manual is a bit confusing. The stator seems to be similar to the one on my '79 Vespa P200E. It has 3 coils, one powers the ignition system, which allows it to run without a battery. Another powers the charging system, and another powers the lights. The Vespa has a kickstarter, and can be started and ridden without the battery, though the lights are very dim. If the XT225 is similar, then it is possible for only part of the stator to fail. If the charging coil failed, but the ignition coil was still ok, it would run when bump started, but still not charge. And, unlike most bikes, if the part of the stator that provides current to the ignition failed, it would not run even with a fully charged battery. It would turn over, but not fire. That happened on my Vespa, and trying to figure it out drove me right up the wall until someone on a Vespa forum explained it to me.
As peejman said, the voltage between the battery terminals when you rev it to 2500-3000 rpm should be right at 14V. 12V systems are almost always designed to run at 13.8V. If you get that much, then the charging system is working IF the battery is good. A shorted battery or one with an open circuit will alter that reading. If you were able to fully charge the battery and it turned the engine over normally, it is probably ok. Don't go by voltage readings alone when checking a battery. It is very possible for a bad battery to read 12.5V on a meter, but immediately go dead when you put a load on it.
Since the bike runs, the ignition part of the stator is ok. If you get 14V across the battery terminals when revving it, then the charging part is also ok. At that point I would suspect the battery. The best way to check a battery is with a load tester on it. That puts a known load on the battery, and measures how fast the voltage drops. If it drops too fast, the battery is bad.
The above is my opinion. Your mileage may vary. 1994/2001 custom built XT225 with a ton of aftermarket parts.
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Board Upgrade:
Board upgrade to V7.7.3 has been completed on Monday Feb 3rd 2020. Ride safely.
Enjoy the new software!
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