It occurred at just after 2pm on Saturday 22 October 2011, at crossroads on Stark Bank Road near Ellingstring when two motorcyclists, who were part of a larger group, collided.
At the time of the collision the motorcycles were travelling in single file, heading towards Jervaulx, when they were passed by a grey old style Land Rover, travelling in the opposite direction.
The rider of the motorcycle was taken to Harrogate District Hospital by air ambulance with serious but non life threatening injuries.
I am appealing for the driver of the Land Rover to come forward as I believe he may have vital information about the collision. I urge the man, or anybody that can identify him, to contact the police as soon as possible.
If you can assist with this investigation please contact TC Tony Leonard at Richmond Police Station on 0845 60 60 24 7 quoting reference number 12110179388.