Police say at about 1:00 a.m., the 18-year-old man was trying to ride his bike through the intersection of Bridge and Tacony streets in Port Richmond, when a car hit him.
The man was thrown from his bike.
He was taken to the hospital where efforts to revive him failed.
The Kawasaki Dirt Bike he was riding is not legally permitted on the street.
The bike involved in the early morning accident did not have tags or lights.
There's no word on whether police intend to file charges against the driver of the car.