Do I have an Electrical problem?

Yamaha FJR Motorcycle Forum

Help Support Yamaha FJR Motorcycle Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

sapest

Well-known member
Joined
Aug 24, 2012
Messages
706
Reaction score
659
Location
Vancouver BC Canada
2016 ES, 105,500kms (65,500miles)
New battery installed the end of March 2024.
April riding log 1032 kms driven. 35 trips of varying length. 8 instances of ‘low’ cranking voltage, 9.22V to 9.64V. Only one in eight is the first trip of the day. Not sure that’s a useful clue.


Start time
Engine off timeTrip timeCranking VoltageCranking Time
Apr 29/2024 13:17Apr 29/2024 13:4326MinuteApr 29/2024 13:139.64V260ms
Apr 29/2024 08:01Apr 29/2024 08:2726Minute
Apr 22/2024 13:57Apr 22/2024 14:058MinuteApr 22/2024 13:549.93V240ms
Apr 22/2024 13:15Apr 22/2024 13:3520Minute
Apr 22/2024 08:05Apr 22/2024 08:3126Minute
Apr 21/2024 15:27Apr 21/2024 16:411Hour14Minute
Apr 19/2024 13:35Apr 19/2024 13:5318Minute
Apr 19/2024 13:17Apr 19/2024 13:3114Minute
Apr 19/2024 07:59Apr 19/2024 08:2728Minute
Apr 18/2024 13:37Apr 18/2024 14:3154Minute
Apr 18/2024 11:35Apr 18/2024 12:2954Minute
Apr 17/2024 19:29Apr 17/2024 20:1748Minute
Apr 17/2024 15:25Apr 17/2024 16:271Hour2Minute
Apr 17/2024 15:11Apr 17/2024 15:176Minute
Apr 17/2024 12:15Apr 17/2024 13:0752Minute
Apr 17/2024 08:01Apr 17/2024 08:2726Minute
Apr 15/2024 13:49Apr 15/2024 13:556MinuteApr 15/2024 13:469.56V450ms
Apr 15/2024 13:31Apr 15/2024 13:376Minute
Apr 15/2024 13:11Apr 15/2024 13:2514Minute
Apr 15/2024 08:01Apr 15/2024 08:2322Minute
Apr 14/2024 12:05Apr 14/2024 12:3126MinuteApr 14/2024 12:049.30V230ms
Apr 14/2024 09:25Apr 14/2024 12:012Hour36Minute
Apr 13/2024 13:15Apr 13/2024 14:431Hour28MinuteApr 13/2024 13:149.22V470ms
Apr 10/2024 11:25Apr 10/2024 11:4924MinuteApr 10/2024 11:229.39V380ms
Apr 10/2024 08:07Apr 10/2024 08:3124Minute
Apr 06/2024 14:05Apr 06/2024 14:5550Minute
Apr 05/2024 18:11Apr 05/2024 19:0352Minute
Apr 05/2024 16:35Apr 05/2024 16:4914Minute
Apr 05/2024 15:09Apr 05/2024 16:171Hour8Minute
Apr 05/2024 13:17Apr 05/2024 13:4326MinuteApr 05/2024 13:139.50V450ms
Apr 05/2024 08:05Apr 05/2024 08:3126Minute
Apr 03/2024 11:55Apr 03/2024 12:1924Minute
Apr 03/2024 08:07Apr 03/2024 08:3124Minute
Apr 01/2024 12:01Apr 01/2024 12:076MinuteApr 01/2024 11:589.23V250ms
Apr 01/2024 10:21Apr 01/2024 11:531Hour32Minute
Total

Do I have a problem? Starter? Bike starts fine every time. Some starts take longer than others, but never more than a 'button press'.
Thx
-Steve
 
Bike starts fine every time. Some starts take longer than others, but never more than a 'button press'.
Thx
-Steve
The other stuff seems like you're dwellling on new data from a new fun toy.....which is certainly fine. I question your assumption about a 'low' unless you cite documentation to the point and not knowing how the measuring gadget works. I know motorcycle batteries are built for a wide range of voltages.

But to answer your question: If your FJR starts, then your FJR is running fine. RM&SL.
 
Three missing bits of information to determine whether you have a problem:
1) What is the starting current as measured with a clamp-on DC ammeter?
2) What is the battery voltage at idle (after a ride) and at 3,000 RPM?
3) After coming back from a ride (fully charged), let the bike sit a minimum of two hours and measure the battery voltage without turning on the key.

For the starting current, the time is very short before it starts so you might have to disconnect the power leads to the injectors to get a real number.
You might want to get the battery load tested if you are concerned about its condition.

(Agreeing with @Ignacio , I think you are likely OK as well)
 
Three missing bits of information to determine whether you have a problem:
1) What is the starting current as measured with a clamp-on DC ammeter?
2) What is the battery voltage at idle (after a ride) and at 3,000 RPM?
3) After coming back from a ride (fully charged), let the bike sit a minimum of two hours and measure the battery voltage without turning on the key.

For the starting current, the time is very short before it starts so you might have to disconnect the power leads to the injectors to get a real number.
You might want to get the battery load tested if you are concerned about its condition.

(Agreeing with @Ignacio , I think you are likely OK as well)

The other stuff seems like you're dwellling on new data from a new fun toy.....which is certainly fine. I question your assumption about a 'low' unless you cite documentation to the point and not knowing how the measuring gadget works. I know motorcycle batteries are built for a wide range of voltages.

But to answer your question: If your FJR starts, then your FJR is running fine. RM&SL.
Stress less is the reason I asked. Cranking voltage of 10v has been quoted here quite often, thats the threshold I had in mind.
Thank you both for quick reply and suggestions.
-Steve
 
Cranking voltage of 10v has been quoted here quite often, thats the threshold I had in mind.
Thank you both for quick reply and suggestions.
-Steve
Odd. I did a a search on "10v" and find a gamut of contrary to kinda vague to totally unrelated. Even less likely with "10v cranking" I did find one site that cites 9.6 in a load test for lead-acid, but I'm not sure I'd hang my hat on it. I'd still go more old-school and if the starter's turning over I'd run it till she doesn't.
 
While cranking the lowest reading I saw was 10V

Put my meter on it as i was starting it, meter went to 10v. when it started

and it dropped to 10v at start up. That looks good

The 10V was (surprisingly) enough to start the bike.
There is a Revzilla article that states "A good battery should not drop below 9.6 volts over 10 seconds or so. (when starting)"
Batterystuff.com (same site you quoted) says elsewhere "A good battery will hold a voltage above 9.6 volts while cranking"

Question answered, I dont have a problem.
-Steve
 
Top