[Water Warrior 2]

Hope you didn't boost the bike from a running car. A car at idle with a modern alternator will snuff the life out of electrical components in a bike. Likely your battery died from lack of use. After a year sitting idle the battery has probably lost it's ability to hold a charge. It may accept a charge but never hold a charge. Get a new battery and fully charge it at a slow rate.
Fresh gas and some SeaFoam will help with running issues due to gunk in the fuel system and carb. While you are at it you might as well install an inline fuel filter between the tank and carb.