charging ?
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Road Captain
Joined: Jun 2009
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From: millstadt ill
charging ?
buddys bike , ac volts out of stator is 58 v. battery has been going dead while riding,battery voltage at battery while off is 12.9 ,fire it up battery voltage is 12.3 , is this a bad voltage reg? thats what i am thinking, the drop is probably from lights and starting.
Outstanding HDF Member
Joined: Sep 2007
Posts: 3,352
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From: Augusta, GA
It very well could be a voltage regulator but to make sure put your volt meter on the battery and crank the engine. As you said, the voltage should drop while starting and then stabilize once started. Now raise the RPMs to around 3K and watch the volt meter, it should climb to at least 13.5 - 14 and shut the throttle.
Even if the voltage does climb, it could still be the regulator working intermittently. Make sure your battery connections are tight (10mm wrench), that is probably 75% of the problems with the charging system I see. If your connections are tight and the battery is still going dead, before buying a voltage regulator ask the shop to load test your battery ( shouldn't be any charge if you're there to buy a $120 battery/ voltage reg) to make sure it isn't the culprit.
Good luck.
Even if the voltage does climb, it could still be the regulator working intermittently. Make sure your battery connections are tight (10mm wrench), that is probably 75% of the problems with the charging system I see. If your connections are tight and the battery is still going dead, before buying a voltage regulator ask the shop to load test your battery ( shouldn't be any charge if you're there to buy a $120 battery/ voltage reg) to make sure it isn't the culprit.
Good luck.
Outstanding HDF Member
Joined: Sep 2007
Posts: 3,352
Likes: 4
From: Augusta, GA
Then it is the VR, good luck.
Supporter
Joined: Jan 2007
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From: along the shore of Mishigami
The older carb bikes (2002) at idle will have about 13.1 vdc and above 2000 rpm 14.1 14.4 vdc. The EFI bikes should be 14.2 vdc at idle and up. I've got a little volt meter from Kurakyn, LEDS show the voltage. I also go with the VR.
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