A 25-year-old motorcyclist was killed early this morning when he crashed his bike into a parked car in Pearl City.  It happened just after 1 a.m. on Kaahumanu Street.  The motorcyclist was taken to a trauma center in extremely critical condition and he died there a short time later.  Police closed Kaahumanu Street in both directions between Hookanike Street and Komo Mai Drive just before 2 a.m. to investigate.  They reopened the street just before 3:30 a.m.