Author Topic: Faulty battery....probably? Or something else?  (Read 615 times)

Offline PaulC

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Decided to check the lights on my SR - oh dear, no lights. Obvious first thought - flat battery, so I put it on charge (AccuMate 6/12V set to 6V). Immediately showed full charge, but the green light initially flashed for a few seconds before settling steady green. I think this may indicate a damaged or sulphated battery, but the charger's instructions are not too clear.

Keeping the charger connected, I tried various things and got the following result:
Position 1 front small bulb and rear light illuminate as normal
Position 2 no dipped beam and rear light goes out
Press brake pedal and brake light illuminates, but quite dim
Switch off all lights and press brake pedal illuminates as normal

I then disconnected the charger and tried again:
Position 1 small light and rear work, but very faint
Position 2 as above no dipped beam and rear light goes out
Press brake pedal no brake light
Switch off and brake pedal illuminates, but very faint

Go for a ride, to check what the ammeter is showing:
Needle is in normal position showing marginal charging
Position 1 needle doesn't move
Position 2 needle shows immediate discharge, but then returns to normal position
Press brake pedal and needle moves to the right as normal until brake released
Returned home and checked that brake light works with bike running - it does
Stop bike and check all lights - very faint as before and can see dim dipped beam. This lasted just a couple of seconds before we were back to square 1.

Battery is a Yuasa and three years old, regulator from Dave Lindsley also three years old. All bulbs ok.

I'd be grateful for your thoughts on this and if you think I do need a new battery, suggestions for sealed units would be appreciated. The Westco battery mentioned in another recent post may be too tall to fit under my seat.

Thank you for your time.

Paul





A10 Super Rocket 1959
Norton International Model 40 1949
Triumph Thruxton R 2016
Ducati Multistrada 1200S Touring 2014


Offline chaterlea25

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Re: Faulty battery....probably? Or something else?
« Reply #1 on: 03.10. 2016 17:58 »
Hi Paul,
Yes it looks like you battery is kaput !!
I dont like recommending a particular brand as others have found , expensive is not always good???
For sealed batteries I am told "Motobatt" are good ???
http://www.motobatt.com/

My own A10 went through batteries at a rate of knots  *sad2*
eventually I stuck in a cheapo  sealed battery and it has lasted several years without "maintenance" *dunno*

John
1961 Super Rocket
1963 RGS (ongoing)

Online metalflake11

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Re: Faulty battery....probably? Or something else?
« Reply #2 on: 03.10. 2016 22:09 »
Hi Paul,
Yes it looks like you battery is kaput !!
I dont like recommending a particular brand as others have found , expensive is not always good???
For sealed batteries I am told "Motobatt" are good ???
http://www.motobatt.com/

My own A10 went through batteries at a rate of knots  *sad2*
eventually I stuck in a cheapo  sealed battery and it has lasted several years without "maintenance" *dunno*

John

Got a Motobat on mine, works well (D.V.R.2 regulator). A word to the wise from the local bike shop was to charge them before fitting, it says 'fit and forget' on the box, but they started having a lot of problems with them. Since they started charging them before fitting the problems seem to have gone.

England N.W
1960 A10
England

Offline PaulC

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Re: Faulty battery....probably? Or something else?
« Reply #3 on: 04.10. 2016 08:02 »
Thank you John and metalflake11. I'll go battery shopping!

Paul
A10 Super Rocket 1959
Norton International Model 40 1949
Triumph Thruxton R 2016
Ducati Multistrada 1200S Touring 2014


Offline duTch

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Re: Faulty battery....probably? Or something else?
« Reply #4 on: 04.10. 2016 08:48 »

 Before you go battery shopping, You don't say, but I presume you've cleaned all the earth and other connections, and connected the lights direct to either yours or a known good battery IE;  bypassed any other dodgy thing like switches and similar that could be a weak link?
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Online WozzA

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Re: Faulty battery....probably? Or something else?
« Reply #5 on: 04.10. 2016 15:20 »
A couple of years ago I had much the same symptoms with a VF1000 I owned,
after much searching & connector replacements it turned out to be corrosion on the main fuse contacts from the battery causing total electrical failure,  then it would come good, then stuff up again at a later time.. *pull hair out*
a $3 new fuse fixed the problem..
'51 Golden Flash Plunger
'57 Golden Flash Swingarm

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Offline PaulC

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Re: Faulty battery....probably? Or something else?
« Reply #6 on: 04.10. 2016 17:12 »
DuTch, I've checked as best I can. Battery earth is sound, both terminals are firm and free from corrosion. I found one loose wire earthing the small front bulb holder to the inside of the headlamp housing, but otherwise, all connections are good. I don't have a spare good battery available. I put a meter across the terminals and got 4.1V immediately after disconnecting the charger which was showing full.

WozzA, the fuse is nice and shiny inside its holder.

Thank you both for your replies.

Paul
A10 Super Rocket 1959
Norton International Model 40 1949
Triumph Thruxton R 2016
Ducati Multistrada 1200S Touring 2014


Offline PaulC

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Re: Faulty battery....probably? Or something else?
« Reply #7 on: 10.10. 2016 12:35 »
New (sealed) battery fitted and all seems ok....for now!

Paul
A10 Super Rocket 1959
Norton International Model 40 1949
Triumph Thruxton R 2016
Ducati Multistrada 1200S Touring 2014