"Police did not re-engage in the pursuit at any point, but continued to make inquiries to try and locate the [rider].''
Police said the motorcyclist crashed at the intersection of Hingaia Rd and Harbourside Drive, in nearby Karaka, about 10 minutes later.
He suffered serious injuries and has been taken to Middlemore Hospital for treatment.
Police have since closed off a section of the road and diversions are in place. Motorists are being encouraged to avoid the area or delay travel.
Some bus services have also been affected.
Police have confirmed that the motorcycle was stolen.
The serious crash unit is now at the scene.