At 7pm on Tuesday 28 July 2020, police were called to reports of an incident on Common Lane in Carrington.
Enquiries established that a 23-year-old man had sustained serious injuries after falling backwards off of a red and black Honda off road bike which he was riding alongside his friends who were also on off road bikes.
Emergency services attended and the man was taken to hospital where he remains in a life threatening condition.
No arrests have been made and enquiries are ongoing.
Police Constable Adam Scott, of GMP’s Serious Collision Investigation Unit, said: “This is a tragic accident which has sadly left a man in a critical condition.
“We are keen to establish the full circumstances behind this incident, and are appealing for any witnesses who may have been in the area at the time and saw the off road bikes.
“This incident happened in daylight hours and we are confident that there are witnesses who may have information that can help us to complete our enquiries.”
Anyone with information should contact police on 0161 856 4741 quoting incident number 2296 of 28/07/2020.
Reports can also be made anonymously to the independent charity Crimestoppers on 0800 555 111.