Police are appealing for witnesses to a fatal crash near Opotoki in Bay of Plenty last Saturday to come forward.
Eion Gebert, 21, a farm worker, was heading to work on his motorbike at about 5am when he was hit by an oncoming car.
Police say they have been told the car overtook a tow truck and three other cars immediately before the crash, but only the truck driver stopped at the scene.
They have also spoken with the driver involved in the crash, but his passenger left the scene before they arrived.
They would like to speak to the passenger and the drivers of the other cars involved.