Update, 3.30pm October 5: Lincolnshire Police have named the man killed in the crash as Glenn Merrin, 55, from Doncaster.
A man in his 50s has died following a serious crash near to the village of Hemswell, north of Lincoln.
The single vehicle crash happened just before midday on Sunday, October 4 on the A631 Hemswell Lane.
The man, who is said to be from South Yorkshire, was riding a Suzuki motorbike in the direction of Caenby Corner when the collision occurred.
At present, no further details about his identity have been released by police.
Investigating officers would like to hear from anyone who may have witnessed the collision and has not already spoken to police.
In particular, one car is believed to have stopped just after the incident and the occupant/s may have witnessed something that could assist the enquiry.
Officers would like to speak to the driver or occupants to see if they have any information that may be relevant to the investigation.
Anyone with any information is asked to contact the Lincolnshire Police Collision Witness Hotline on 01522 558855 or 101 quoting incident 210 of October 4.