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[marshall10]

I have a 2009 FLHX, everything has been running fine, until yesterday. Last night I noticed that with the bike turned off the voltage meter read voltage (about 9v). I decided to run a diagnostic and I got no trouble codes, no check engine light, nothing at all. The bike runs fine. I did, however, get part numbers on the diagnostic. I got the part number(s) for my Speedo, Tach, and security system. Does anybody have any idea why this is happening, and why all of a sudden? If it helps I rode a bit on monday and tuesday and on both days the temperature was over 90.

[skyhook]

really not trying to be a smartaleck

but if it runs fine, just run it

i try not to get mine too hot, like riding thru town with stoplights and traffic backed up

these are air cooled motors and don't deal with these conditions well

[Twolanerider]

Put a volt meter on the battery.  See if a separate voltmeter measuring at the battery while the bike runs also responds with low 9v reading.  You'll need to raise the RPM above an idle to see the full effect of the charging system.

If it does read the same 9v you're seeing on the dash mounted gauge you've got charging system problems (rotor, stator or regulator).  And, yes, you would be able to keep right on riding it; right up until the battery is dead and you parked it on the side of the road somewhere.

If instead the volt meter testing directly at the battery reads in the expected 14v range your charging system is ok.  Suppose most likely culprit then is a bad volt meter in the dash.  Or some connection problem going to it.  But you do not need to get it checked at the battery.  Riding it until it stops is sometimes necessary.  But not when there's an option.