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What is the difference between motorcycle batteries?

Will O asked:


I have a motorcycle with no battery. However, I have another motorcyle with a battery, but it’s a different size and won’t fit in the first motorcycle’s battery cage.
If I just want to check and see if the battery-less bike runs, can I just set the battery next to it and connect the terminals, and start it up?

The questions is, are there differences in batteries besides size? Will this ‘test’ work, or will i damage the first bike?

thanks in advance

2 Responses to “What is the difference between motorcycle batteries?”

  1. Steve Y says:

    As long as you connect the terminal correctly, you won’t have any problem. The only other difference in batteries, apart from size, is voltage. You won’t damage a 12V bike by trying to start it with a 6V battery, but the other way around will!

  2. llordlloyd says:

    The difference is voltage and amperage.

    You can certainly hook the battery to the bike and run it for a while for a test, but if the battery amperage does not match the charging system of the bike, then over time the battery will either run down, or be over-charged and ‘cooked’.

    But certainly perform the test by all means.

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