i have a 2006 ninja 250 that has been sitting in my garage for about 1 year since i last rode it. i tried to start it a couple of days ago and the battery is about dead. the gauges still light up but nothing happens when i press the ignition button. now if i try to push start it or jump it, would the battery be able to charge itself back? or would i need to buy a battery charger? or perhaps a new battery altogether? i'm also planning to relube the chain and check the tire pressure, but is there anything else important i should check out before riding it again? i would much rather do as many things as i can myself so i don't get ripped off at a service center, thanks in advance.