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 Post subject: S3T charging issue
PostPosted: Sat Jul 18, 2020 6:03 pm 
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Joined: Tue Jan 19, 2010 2:08 pm
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Location: Cambridge
OK, I lied! I need more help. Good news is the bike passed its MOT so I'm now legal and aiming to get to Em's ride out. However, the battery is not charging properly. It's a brand new Odyssey battery but after a full charge and then a 30 mile ride, the next morning I get the dreaded 'click click click'.
I've looked at Pash's very useful 2009 'how to' on changing the voltage regulator but my issue is slightly different. After a full charge, Bike off, voltage across battery is 12.74V. Bike on, voltage across battery is 14.15V, all good one would think BUT revving the bike sees no change, the voltage stays at 14.15V. My understanding is this should climb to 14.4V? Should I still be thinking replacement regulator?


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 Post subject: Re: S3T charging issue
PostPosted: Sat Jul 18, 2020 6:22 pm 
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Joined: Wed May 06, 2009 5:10 pm
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Current ride: 99 Cyclone M2
Location: Liverpool
14v should be enough to keep it charged, I would suspect an earth fault, the connection of the braided strap between the swinging arm and frame have been known to be problematic, worth a check :idea:

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 Post subject: Re: S3T charging issue
PostPosted: Sat Jul 18, 2020 6:53 pm 
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Joined: Tue May 05, 2009 8:00 pm
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Current ride: X1 2001
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so the voltage stays constant when the engine is reved ?
sounds like a voltage regulator fault , as there should be a variation as the bike is reved
try cleaning the voltage regulator connections , including it's earth

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 Post subject: Re: S3T charging issue
PostPosted: Sat Jul 18, 2020 8:19 pm 
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:?: S3Tim how accurate is your volt meter , you are talking about a 0.25 volt :?:

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 Post subject: Re: S3T charging issue
PostPosted: Mon Jul 20, 2020 9:44 am 
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Joined: Tue Jan 19, 2010 2:08 pm
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Location: Cambridge
Quote:
S3Tim how accurate is your volt meter , you are talking about a 0.25 volt ?


Hi Barney, it's only a cheap multimeter but I would have thought that even if it was accurate to only +-0.25V it would still increase as the revs went up? I'm going to try cleaning up the regulator contacts as I've already done the main earthing points due to other electrical problems.Finger crossed!


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 Post subject: Re: S3T charging issue
PostPosted: Wed Jul 22, 2020 2:59 pm 
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Joined: Tue Jan 19, 2010 2:08 pm
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Location: Cambridge
So, voltage across battery at idle = 14.2V. Voltage after 20 mile ride, bike stopped, 13.5V reducing to 12.8V fairly quickly. Voltage across battery next morning = 12.6V. Still get the click-click. :evil:

All leads/groundings cleaned and sanded. I don't think the charging system is at fault. D'you think solenoid or starter maybe?


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 Post subject: Re: S3T charging issue
PostPosted: Wed Jul 22, 2020 4:29 pm 
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Joined: Wed May 06, 2009 5:10 pm
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Current ride: 99 Cyclone M2
Location: Liverpool
Solenoid possibly, you can open it fairly easy to check

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 Post subject: Re: S3T charging issue
PostPosted: Thu Sep 24, 2020 6:19 pm 
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Current ride: S3T Thunderbolt ish
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Don’t clean and sand the leads... chuck em ! They are breaking down when overloaded by the sounds of it, then as a result lose the ability to ground enough to complete a charging circuit.
I had the same problems with mine.I bought new starter motor, Solenoid, rectifier Reg, Pulled most my hair out in the process... then spent 15 poxy quid In Halfords on 3 new leads an it cured everything..!
The missus had to hide my baseball bat For about a week after that.......

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 Post subject: Re: S3T charging issue
PostPosted: Fri Sep 25, 2020 10:47 am 
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Yeah, be careful cleaning leads like that. Often they are 'brassed' and cleaning them with abrasive removes this. This makes them more prone to oxidising again.

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 Post subject: Re: S3T charging issue
PostPosted: Fri Sep 25, 2020 12:23 pm 
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Location: Cambridge
Mmmm, thanks Hassle/Adam. I still have an issue and have resorted to putting metal tags on the battery terminals so I can easily jump start the bike from my car. :D I just want to ride it while the weather is so nice, it's not ideal but it gets me out! I can look deeper over the winter.

Hassle, I was thinking that as I can jump start the bike easily from the car that it probably isn't the earth leads? Or does the earthing get done through the car when you jump start?


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 Post subject: Re: S3T charging issue
PostPosted: Fri Sep 25, 2020 1:26 pm 
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Current ride: X1 2001
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jump starting from a car , make sure the car isn't running !
the earthing isn't via the car , but extra amps help get through dirty or high resistance connections.
have you checked the resistance of the generator windings ?

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 Post subject: Re: S3T charging issue
PostPosted: Fri Sep 25, 2020 5:15 pm 
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Location: Cambridge
Quote:
have you checked the resistance of the generator windings ?


Sorry Nutah, not sure what you mean by this. Do you mean the alternator/stator resistance?

If so, can that stop a healthy, charged battery from cranking the bike?


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 Post subject: Re: S3T charging issue
PostPosted: Fri Sep 25, 2020 6:04 pm 
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Current ride: X1 2001
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:mrgreen:
sorry didn't read that right :oooops: .. so you have a good battery BUT overnight losing voltage , sounds like you have a parasitic drain .

overnight disconnect the earth to the battery , then see what the voltage is in the morning.

OR WITH THE BIKE OFF ....remove the live terminal connect the meter set to Amps between the battery positive & the positive lead , see what the current draw is
as if the battery volts are going down , you have either a duff battery (can happen to new ones too ) , or a short to earth or live circuit draining it (like an alarm would)

if unsure you tube is handy for how to videos on charging issues :yup:

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 Post subject: Re: S3T charging issue
PostPosted: Sat Sep 26, 2020 9:37 pm 
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Current ride: S3T Thunderbolt ish
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Yep agree with all that a Nutah says their

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 Post subject: Re: S3T charging issue
PostPosted: Sun Sep 27, 2020 6:54 am 
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Current ride: Buell ulysses
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By the inclusion of a single letter “a” in you last post makes a whole lot of difference to the message :hehe: didn’t know you had meet Don already :rotfl: :yup:

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