I am buying a bike from a guy who has had it in a garage for 4 years. It has been on the centerstand. It is a ZX11. Everything looks great on the outside. He had it serviceed before it sat. He had a promotion and never rode it. He is looking to give me a deal to get it out of his garage. Aside from a new battery and inflating the tires, what do I need to do before I ride it? Thank s for all assistance.