Registering with no title in Florida

Hey guys, my friend has a no title dirt bike that he only used for motocross, he wants to sell it and I was thinking about buying it but I want to be able to go to places like croom and Ocala national forest which I’ve heard need the green ohv registration stickers, has anyone gone throught the process of registering a bike with no title in Florida, if so would you be able to say how much of a pain it was or around how much it costs?