90% of the time when I turn the key I just get a clicking sound and nothing happens. The other 10% my ATV turns over fine and then starts. I have a battery tender on it, my battery should be fine, it works fine 10% of the time. When it doesn't start with the starter it will start on the first pull. Any suggestions??

 

you need to check the solenoide or starter. next time it clicks, and your 100% sure the battery is fully charged, w/ the key on jump the 2 big post of the solenoide and see if it cranks the bike over. if it does the solenoide is bad, if it doesnt and just clicks the starter is the issue. make sure the battery is fully charged.