The motorcyclist, a 48-year-old man, suffered fatal injuries in the collision and was pronounced dead at the scene. He has been named as Martin John Young, aged 48 and from York.
Another motorcyclist, also aged 48 and from York, sustained serious injuries in the incident and was taken to Airedale Hospital for treatment. He has been released from hospital following treatment for a broken collar bone.
The two men were riding along the B6479 between Ribblehead and Horton in Ribblesdale at around 5.35pm on Monday 22 September 2014, when they came off their bikes on a left hand bend.
The road was closed until just before midnight to allow police to examine the scene.
Officers are appealing to anyone who witnessed the collision or saw the two motorcycles – a black KTM and a red and white Husqvarna – travelling along the B6479 prior to the collision to contact them with information.
The other motorcyclist involved in the collision has been released from hospital following treatment for a broken collar bone.
Officers are still seeking witnesses to the collision and are urging anyone who saw the two bikers on the B6479 prior to the collision which occurred at around 5.35pm, to get in touch.
Anyone who can help officers with their enquiries is urged to contact North Yorkshire Police on 101 – select option 2 – and ask for Traffic Constable Martin Mulcaster.
Alternatively, information can be emailed to firstname.lastname@example.org
Please quote reference number 12140163431 when passing information about this incident.