A Naples man was thrown from his dirt bike on Thursday afternoon when he collided with a truck. Joshua Cavallaro, 20, was riding a 2009 Honda 450 off-road dirt bike about 2:32 p.m. when he struck the passenger side of a 2022 Ford F450 pickup truck making a left hand turn onto Maplewood Road from Songo School Road in Naples, according to the Cumberland County Sheriff’s Office. Cavallaro, who wasn’t wearing a helmet, was thrown from the bike, suffering head injuries, the sheriff’s office said. He was airlifted to Maine Medical Center in Portland, where his injuries were determined not to be life-threatening. The pickup truck’s driver, 80-year-old Robert Mason of Naples, told police he never saw Cavallaro approaching when he turned onto Maplewood Road.