I own a 1989 Suzuki LT250SK and i need to know how to run a brakelight on this bitch. I dont have a battery so I need as much help as I can.

 

do you mean a taillight? A brake light would be difficult to install on bike that wasn't equiped with one from the factory. That bike came with a taillight from the factory, so it shouldn't be hard to intall one if its missing.