The motorcyclist aged in his twenties suffered fatal injuries when the Suzuki GSX machine he was riding was in collision with a tree on Ponker Lane just before 5pm on Wednesday May 3.
Police believe the collision was witnessed by a jogger who was in the area at the time and stopped at the scene.ã€€
The motorbike, which had been travelling in the direction of Shelly Woodhouse Lane, crossed onto the opposite side of the carriageway before colliding with a tree.ã€€
The rider was treated by paramedics at the scene, but was pronounced dead a short time later.ã€€
Sergeant Ann Drury, of the Major Collision Enquiry Team, said: "We have had several members of the public come forwards as a result of our appeals, and have been made aware that a jogger was in the location at the time of the incident.ã€€
"We would very much like to speak to the jogger who stooped at the scene and may well have assisted the motorcyclist.ã€€
"We would also like to speak to the driver of a small green hatchback car - possibly a Micra - that was in the area at the time, as we believe they may have information that is valuable to the investigation."ã€€
Anyone with any information is asked to contact the Major Collision Enquiry Team on 101, quoting log number 1398 of May 3.