Fifty-five-year-old Doug McCune of Princeton Township was pronounced dead at the scene of Saturday's crash in Clinton Township. Authorities said he was wearing a helmet, but further details on his injuries were not disclosed.
A cause of death hasn't been determined.
McCune was an award-winning scientist who developed sophisticated software used around the world to understand the physics of fusion experiments. He was taking part in the annual "Ride for Runaways" event that benefits Anchor House, a Trenton-based shelter for abused and neglected children.
His death occurred on the final day of the 500-mile, 7-day ride.
