A young motorcyclist from Pickering died Sunday when his bike left bumpy, unpaved Pickering Concession Road 7 at Chalk Lane Rd. in Uxbridge. The rider, 23, was fatally injured when the vehicle apparently struck a steel signpost, one of several at the corner. He was declared dead at a local hospital late in the afternoon. Durham police conclude that the young man lost control of his bike for reasons they are still investigating.