I have an 03 wrf450. Last year I rode all year with a dead battery (just always kick started it). This year I went to put in a new battery to use the electric start. The battery is fully charged (has a 12.78 v reading). When I press the button to start the bike it sounds like the battery is almost dead. I get three tries, each time the battery seems to get more and more tired. After the third time the bike won't even turn over I just get a clicking sound. When I check the battery it still shows a 12.78 v. I can kick start the bike and it starts. When I turn it off and try the electric start again I get another three tries until the battery seems dead and I only get a click. The bike sometimes does start within the three tries, but my problem is if it doesn't. I have the same model battery on a little go cart the kids use and it seems like they can turn the cart over 30-40 times before the battery gets tired. Any ideas?