A Warsaw man involved in a motorcycle accident last week died Sunday. Michael K. Buehle, 50, was driving his 1998 Honda motorcycle eastbound on Old 30 at 6:55 p.m. Wednesday when, for an unknown reason, he left the south side of the road and then overturned. Buehle and his passenger, Teresa M. Evans, 62, Warsaw, were immediately airlifted from the scene by Samaritan helicopter and transported to Parkview Regional Medical Center, Fort Wayne. Buehle died Sunday at Parkview. Titus Funeral Home is handling funeral arrangements for him. Evans was listed in critical condition this morning. Kosciusko County Fatal Alcohol Crash Team members stated that a preliminary investigation into the crash determined that neither Buehle nor Evans were wearing helmets at the time of the crash.