[mike884]

Aging battery I would assume... If you have the original in your 07.. it is going to be due for a replacement soon. From what I hear a good battery should be ok for 4-5 years, which is almost time for an 07.

 

[greywolf]

A stock Strom electrical system will commonly output a volt or more less at idle than at running rpm.

 

[Aussie Rider]

It's true of other bikes too. My honda VTR does the same thing. I rev it a couple of time and immediately the headlight brightens up with the revs.

 

[mad dingo]

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.

 

[KOG]

Thanks all. It's probably normal and I just never noticed it before. I will check voltages anyway.

 

[SCraig]

Check the terminals at the battery for corrosion. That's a common cause of voltage drop across the system.

 

[sdvstrom]

I recall reading somewhere that dimming headlights is one of the first symptoms of a battery in bad health.

 

[SCraig]

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.

 

[sdvstrom]

Definitely bad connections can be the culprit..... maybe even a regulator going south?