A motorcyclist died in a crash Thursday night in Bedford, police said.The 23-year-old man was pronounced dead after 11 p.m. at Elliot Hospital after the crash on New Boston Road near the intersection of Route 114. >> Download the FREE WMUR appPolice said the man crashed into a guardrail.The victim’s identity has not been released.New Boston Road was closed for hours after the crash as police investigated.The cause of the crash is under investigation.