Wow, what a great introduction to a Hayabusa. I wrecked my bike, got run down by a drunk driver back in 2014, and had to rebuild the entire bike essentially. So please pay attention to every nut and every screw, every piece of wire, clean it up end to end and put some new fairings on it. The fuel system is particularly an issue. I'd clean out the tank and replace the pump, validate fuel pressure, then I would clean out the fuel rail while you're cleaning out the injectors, that's a good start. If you have a clean fuel system and fresh lubricant, a Busa motor will essentially run. After that, it's all electrical. May be a fresh wiring harness from a running bike would be a good idea. Good luck with your find. Welcome to the ORG, and ask lots of questions. There are a lot of people in here that know a lot about this bike.