Sgt.Lawrence A.Neth;27;of 1522 West Intruder Circle;Virginia beach;Va.;died at the Humana Base Side Hospital;Virginia Beach;Wednesday;Dec.31;1986 as a result of injuries received in a motorcycle accident.  He was born June 13;1959 in Chicago;Ill.;a son of Frank W.and Betty J.Glenn Neth of Belle Vernon R.D.3.  He was a member of the Olive Branch Baptist Church of Rostraver Township.  Survivors include his wife;Rebecca;two daughters;Kansis and Shannon;both at home;two brothers;Warren M.and Gerald L.;both of Belle Vernon R.D.3;his maternal grandmother;Jeanette Glenn of Des Plaines;Ill.;and his great-grandmother;Nora Foss of Buffalo Grove;Ill.  Friends will be received Sunday from 2 to 4 and 7 to 9 p.m.in the James C.Stump Funeral Home;Rostraver Township;where services will be held Tuesday;Jan.6;at 11 a.m.with full military rites.  The James C.Stump Funeral Home is in charge of the arrangements.