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Why are my lights dimming at stops?

1097 Views 9 Replies 7 Participants Last post by  sdvstrom
I don't recall this happening before. Is this normal and I just didn't notice, or is there something else going on? (like stator or R/R)
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· FORUM GODFATHER.....R.I.P. PAT
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A stock Strom electrical system will commonly output a volt or more less at idle than at running rpm.
 

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I agree with battery assessment, it should be making up for loss of voltage due to lower RPMs by tapping into its storage, but it isn't. Do a quick voltage check across battery idling, revving and turned off and that will tell the whole story. I don't disagree that there may be no problem at all. Some level of dimming should be expected. If the bike still starts fine, I would wait and see if it gets worse.
 

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I recall reading somewhere that dimming headlights is one of the first symptoms of a battery in bad health.
Dimming headlights is a symptom of low voltage in the system. The reason for that low voltage can be caused by a number of things, one of which is a failing battery. Mine used to do it from time to time due to corrosion on the terminals, which is why I mentioned that.
 
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