Officers are appealing for any information, including dash cam footage, following a fatal collision on Mansbridge Road, Southampton last week.
Officers were called following the collision involving an orange, trail style motorbike and a pedestrian at 7.41am on Thursday 7 March.
The pedestrian, 55-year-old man Adam Wilcox of Colehill Crescent, Bournemouth, was taken to Southampton General Hospital with life-threatening injuries. Sadly, he died later in hospital on Friday, 8 March.
His next of kin have been informed and are being supported by specialist officers.
Officers are continuing to investigate the exact circumstances of the collision.
If you have any information, please contact us on 101, quoting reference number 44190080297.
In an emergency, call 999.