The male victim was riding the motorcycle at a dirt sports park in the 12000 block of Holly Street around 12:30 p.m. While performing a tabletop jump, he was dislodged from the bike, tossed through the air and onto the ground, according to Jurupa Valley deputies.
Paramedics treated the victim at the scene. He was then transported to Arrowhead Regional Medical Center where he died from his injuries.
The victim's name has not been released.