The California Highway Patrol responded to reports of a crash on Highway 41 near Creston at about 12:15 p.m. on Thursday.
CHP says Joseph Haga, 71, of Templeton was riding his Yamaha MT10 southbound just north of mile marker 34.00 at an unknown rate of speed.
When he reached a right turn in the road, for unknown reasons, he drove off the side of the road, lost control and collided with a barbed wire fence and fence posts.
Haga was ejected from the motorcycle and declared dead at the scene.
Officers are still investigating the crash and say drugs or alcohol do not appear to be factors.
