You can run it with no hoses connected to the carbs, but I like to put at least short hoses on them, to help keep dirt out of the float bowls. You can get however much you need of this hose at any auto parts store. There have been rare cases of engines cutting out above certain speeds, or when ridden in a crosswind, due to air blowing over the ends of the hoses creating a vacuum in the carbs. I think this is unlikely, but if if should happen, relocating the ends of the hoses out of the airflow will solve the problem.