Symptoms Of A Flat Battery.

Discussion in 'Bonneville' started by Malcolm Woods, May 16, 2020.

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  1. Malcolm Woods

    Malcolm Woods Noble Member

    Sep 16, 2019
    331
    313
    norfolk
    Ok away from my previous threads and onto something more triumph serious, I have a 2011 T100.
    On a few occasions when wheeling the bike out of the garage having had the battery on charge for couple of weeks, when I press the starter button she sounds like the battery is flat, but... persevere and she eventually will go. the previous owner told me about this so expected it..
    My point is I cannot believe I am the only one who have this slight problem ???? never encountered this other bikes I have owned. Is there a fix for this does anyone know of.
    Thanking you all.
    Mallywoods.
     
  2. Malcolm Woods

    Malcolm Woods Noble Member

    Sep 16, 2019
    331
    313
    norfolk
    Less than 4 months.
     
  3. Samsgrandad

    Samsgrandad Senior Member

    Dec 15, 2019
    496
    213
    Somerset
    Have you checked the wiring and connections? Any dirty or loose connections? Is the main fuse clean and firm?
     
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  4. freck

    freck Elite Member

    May 4, 2017
    1,719
    750
    Preston, Lancs, UK
    Does it do this every time or do the symptoms change slightly?
    I’m just thinking it could be a faulty starter solenoid, or even the starter itself.
    As littleade says though, a good clean/ check of connections from the battery to the starter would be the first steps.
    Good luck with getting the problem sorted.
     
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  5. Malcolm Woods

    Malcolm Woods Noble Member

    Sep 16, 2019
    331
    313
    norfolk
    Please tell me ,,, have I a problem, thought is is not unusual on our bikes???
     
  6. freck

    freck Elite Member

    May 4, 2017
    1,719
    750
    Preston, Lancs, UK
    Not being a T100 owner I can’t say that it isn’t a quirk of the model, but being an engineer makes me think there is a problem if it’s not working as it should be expected to. :confused:
     
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  7. crispey

    crispey crispey creme de la creme

    Nov 6, 2014
    7,194
    1,000
    Uk
    I’d say there’s a problem. Give us a clue! It obviously has been happening since you’ve bought the bike but was that 3 months ago or pre your new battery? If you can’t hook your bike up to a known good battery and see if it still happens then, as said above, give everything a good clean up and check
     
  8. Malcolm Woods

    Malcolm Woods Noble Member

    Sep 16, 2019
    331
    313
    norfolk
    Ok thanks for the reply, it did the same with the old battery that's why I bought a new one, I will check clean earth connections and check tighten every thing.today.
     
  9. Tigcraft

    Tigcraft Unheard of Member

    Mar 29, 2014
    2,565
    800
    Holmfirth West Yorkshire
    What are the symptoms? Does it just click pause click pause click etc? If so is it a fast series of them or is there a good full second between the clicks? If you run a test wire directly from your positive to the starter solenoid (small tab) will it turn over successfully?
     
  10. Malcolm Woods

    Malcolm Woods Noble Member

    Sep 16, 2019
    331
    313
    norfolk
    Yes your right click pause 3 or 4 times then the engine turns, sometimes the engine turns on the button first time.
     
  11. jeffrey vale

    jeffrey vale Member

    Sep 7, 2019
    26
    13
    cheshire
    Had similar problem with my old t100 and it was the starter relay,changed it for one off flea bay, no more probs.
     
  12. Rocker

    Rocker Elite Member

    May 1, 2016
    1,662
    800
    Suffolk
    If you get a click it sounds like a bad connection from the solenoid to the starter motor or a bad starter motor but could also be the solenoid change the cheapest parts first
     
  13. Callumity

    Callumity Elite Member

    Feb 25, 2017
    3,358
    800
    Nr Biggar
    I have a slightly more mature T100. With a healthy battery it has never hesitated. Your intermittent symptoms smack of a poor connection (earth strap stud underside rear gearbox?), lazy relay etc. I would squirt the fuse box and multiplugs (don’t forget inside headlamp shell) with electrical cleaner (Halfrauds aerosol) and wiggle. At nearly 10yrs old you can reasonably expect mild corrosion and the odd tired component.
     
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  14. Tigcraft

    Tigcraft Unheard of Member

    Mar 29, 2014
    2,565
    800
    Holmfirth West Yorkshire
    What’s the time between pauses?
     
  15. thebiglad

    thebiglad Old fart, still riding !

    Sep 25, 2013
    5,064
    1,000
    Central France
    Hi Mally, I had a 2010 T100 for about 5 yrs and the only time I had symptoms like yours was when I had to replace the battery. Even though it was on charge when not ridden it didn't hold a charge. So I would charge it, measure the voltage across the battery terminals and get a reading of perhaps 12.7v but as soon as I tried to fire her up, all I got was a click. When I connected a known-good car battery with jump leads she would fire up like a good'un.

    Apparently the ECU senses battery voltage and if it is below a certain threshold (12.5v I believe) the ECU won't allow an engine start. I think it's got something to do with protecting the sprag clutch.

    So, bottom line is you need a good quality battery operating to it's optimum. Yuasa is the make I would recommend for a std. bike battery.
     
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  16. SprinterII

    SprinterII Noble Member

    Mar 27, 2020
    642
    443
    Scotland

    Second the, earth connection.
     
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  17. Tigcraft

    Tigcraft Unheard of Member

    Mar 29, 2014
    2,565
    800
    Holmfirth West Yorkshire
    But really Dave, a reasonably new battery @ only several weeks old should work no matter what manufacturer as it need to be of merchandisable quality or taken back to the shop?
     
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  18. Jadorff

    Jadorff Noble Member

    Apr 14, 2019
    873
    443
    Adelaide Australia
    that sounds like sonanoid to me had the same problem changed all the easy bits then got an auto electrictrion and ended up being a short to the clutch switch on the clutch lever he also bypassed that problem of telling the computer the battery didn't have enough volts sorry but my spelling leaves much to be desired
     
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  19. Mischa Vladivostok

    Mischa Vladivostok Well-Known Member

    Feb 9, 2015
    234
    93
    Dublin, Ireland
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