A 28-year-old Kaneohe man died after crashing his motorcycle into a metal guard rail on the Likelike Highway early yesterday. The crash happened in the Kaneohe-bound lanes before the Wilson Tunnel just after 4 a.m. Police say the man was wearing a helmet. He was pronounced dead at the scene.  Speed was a factor, according to police, but they aren't sure if alcohol and drugs also played a role in the crash.  This was Oahu's 40th traffic fatality so far this year, compared to 43 at the same time last year.