Police launched an appeal after the man, in his 30s, who was riding a red and black Honda motorbike, collided with a parked red Peugeot Expert van near to the Royal Mail sorting office on Thorpe Road.
Following the crash, which happened shortly before 11.30am on July 31 last year, he was taken to the Norfolk and Norwich University Hospital with life-threatening injuries.
A spokesman for Norfolk Police said the investigation has been “closed” although the motorcyclist, who spent more than two months in hospital, suffered “multiple” and “life-changing injuries”.
As previously reported, the road was closed while emergency services, including an ambulance, attended the scene.