The fatal crash on Kirton Road, Blyton on Wednesday, April 14.
Police Sergeant James Kirk would still like to hear from anyone who saw the collision or either of the two motorcycles travelling towards the collision site.
The two motorcycles, a silver Wuyang and a blue Suzuki were travelling in the same direction, away from Blyton, on the B1205 towards the Northorpe direction.
The rider of the Wuyang motorbike, John Pirie, 34, from Kirton Road, Blyton, sadly died at the scene. The police know he had called at a local shop in Scotter before then riding towards Blyton village where they believe he turned onto the B1205, Kirton Road from the junction with the A159.
The rider of the Suzuki had also travelled from Blyton village along the B1205 Kirton Road in the same direction.
Did you see either motorcycle before the collision or the collision itself or have any dashcam footage of such? If you think you have any information that could assist then please contact the police and their Investigating Officers will be in touch.
There are a number of ways to get in touch, by emailing [email protected], remember to put the reference incident 308 of April 14, in the subject box, call the non-emergency number 101, quoting incident 308 of April 14, or through the independent charity Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org.