Officers are appealing for witnesses after a road traffic collision in the Staffordshire Moorlands.
The collision happened at around 1.30am on Saturday 19 April on the A523 Leek to Macclefield Road near Rudyard and involved a singe vehicle, a black Yamaha motorbike.
The motorcyclist, a 19-year-old man from Stoke-on-Trent, suffered serious arm injuries and was taken to the University Hospital of North Staffordshire for treatment. His injuries are not believed to be life threatening.
Witnesses to the collision, or who saw the motorbike in the area beforehand, are asked to contact Staffordshire Police on 101, quoting incident number 76 of April 19.