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battery flat


sam64
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hi guys my son picked up a bike Saturday, secondhand but it keeps loosing power took the battery off charged it up, bike started up ok drove it to work today then went for some fuel bike started up then lost power again . battery is flat. can anyone help.

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hi guys my son picked up a bike Saturday, secondhand but it keeps loosing power took the battery off charged it up, bike started up ok drove it to work today then went for some fuel bike started up then lost power again . battery is flat. can anyone help.

 

Replace the battery.

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Two possible scenarios......

1/ Battery not holding a charge.= replace battery

2/ Bike charging circuit not working = check charging circuit


or a possible 3rd scenario......something is drawing current from the battery when the bike is off = check for current draw from the battery when the bike is off.


If you have and can use a multimeter you can check all these things quite easily..... :)

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With the engine running check you have 13.2v or more at the battery terminals.

If you don't, you have a charging fault.


With the engine off check you have 12v or more at the battery terminals.

If you don't, you have something drawing power from the battery.


My money is still on changing the battery though :lol:

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