do a compression check. The rings could be stuck if it sat for that long. Pull the carbs and clean out the jets. They can get clogged easily with old fuel. drain the tank, throw fresh gas in, slosh it around real good, drain that out. run gas through petcock and lines. make sure brakes aren't frozen, tires hold air. cables move free. Check coolant when bike is running and see if you can see it surge when you hit the throttle. there's more that can be done just don't half ass it and get to excited to go ride and miss stupid shit.