My ATV makes 1 very quiet click when I turn the key

[gio2008rider]

I just got an ATV. It didn't come with the battery, the guy told me he used a 12V 5a battery. I got a new 12V 9a battery and installed it, turned the key... and it made 1 extremely quiet click. Turned the key again, same thing.

What is the problem? The guy I bought it from told me it ran when he had the battery in, so assuming he's telling the truth, could it be because the battery is 9a instead of 5a?

I checked the fuse and it looks fine.

Thanks!