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  1. #11
    Senior Member RipGroove's Avatar
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    I'm no sparky at all so can anyone tell me why/how my battery seems to measure OK with regards to Volts but at the same time not be able to start the bike, can a battery charge and keep volts but somehow loose it's Amps?


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    | 2014 Matte Grey MT-09 | Ti Akrapovic | Ohlins 46DR Rear Shock | Andreani Fork Cartridges | FlashTune ECU Flash | G2 Throttle | DNA Air Filter | Yamaha LED Indicators | Yamaha Fly Screen | Puig Tail Tidy | Michelin PR4's | Kev's 02 Mod |

  2. #12
    Senior Member
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    MT09 , 1250 Bandit
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    A battery needs to have a very low impedance (internal resistance) to be able to supply high current.If some fault has increased the impedance the current will be limited and the battery won't turn the motor over.The voltage across the terminals won't show this.When automotive batteries fail it is usually in this way.If the voltage has dropped,then a cell may have failed.

  3. #13
    Super Moderator Triple Trouble's Avatar
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    *TUT*.....
    I was just gonna say that.....!


  4. #14
    Senior Member RipGroove's Avatar
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    How to find a battery drain?

    Battery tester arrived and I'm pretty sure my battery is fucked.

    Charged battery for at least 24hrs, results:

    No load (12.8v)


    Load applied, needle started just inside the WEAK section and quickly moved to BAD:


    With the load off again the needle quickly went back to 12.8v so according to the instructions that indicates a knackered battery:


    I need to order something today on 24hr shipping so my options are pretty low as the bike has to be functional ASAP so as I haven't got any time to research a better lighter alternative I've had to get another Yuasa one.

    That said though I've read reviews on Yuasa and they seem highly rated and are supposed to last years if looked after.

    So I guess I killed it by leaving it in the cold garage over the Winter and not starting it enough, I probably should have hooked it up to a battery tender over the colder months when the bike was not in use. Hopefully that's all it is and I haven't actually got a parasitic battery drain that for some reason I can't detect.


    Sent from my iPhone 
    | 2014 Matte Grey MT-09 | Ti Akrapovic | Ohlins 46DR Rear Shock | Andreani Fork Cartridges | FlashTune ECU Flash | G2 Throttle | DNA Air Filter | Yamaha LED Indicators | Yamaha Fly Screen | Puig Tail Tidy | Michelin PR4's | Kev's 02 Mod |

  5. #15
    Senior Member
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    MT-09, Fazer8
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    Best thing if you are storing the bike for more than a month or two is to disconnect the battery, or take it out and keep it somewhere where you can give it an occasional charge. OK, you lose all the trip info, time etc.

    Alternatively, if the garage has a window with some daylight, hook it up to a solar charger. I used one of those (the very basic one that I got from Maplin's, though Oxford re-badge them and sell them at a higher price) for several years on a bike that had a Datatool alarm. It still had the original battery when I got rid of the bike at eight years old.

    Starting the bike takes quite a drain, and needs a run of a few miles to top the battery up again.

  6. #16
    Junior Member Mark Cousins's Avatar
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    MT-09 2015
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    I got one of those oxford solar panels, pretty useless if you ask me. Had mine connected all winter and they are supposed to keep a charged battery charged. Three times mines gone flat now

  7. #17
    Member
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    MT-09 in Armour
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    I have had great success using a solar panel to keep both my car and motorcycle batteries topped up in a lock-up garage without electricity. Basically around two and half years ago I bought a solar panel off ebay for less than 30-quid along with a controller, which is absolutely essential, for a further 8-quid. It measures approx 600mm x 450mm and has an output of 20watts, it's also waterproof so it's mounted outside on the back of my lock-up at a 45-deg angle. I have it connected to my car all the year around, and occasionally I swap it over to my bike to top it up, in two and a half years I have had no-issues whatsoever. The reason for the controller is despite only being a 20watt output on a very sunny day it can overcharge so the controller stops this from happening, also overnight when the panel obviously doesn't work stops it from reverse discharging.

 

 

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