The Collier County Speedway held another afternoon of mo torcycle racing Sunday with the usual large turnout of riders. In the minibike class, Scot Vanvik took top honors, fol lowed by Russ Davis in second and Bill Reese in third. At 100 c.c.s, Grimes Tinsley outdistanced the rest of the class. Doug Stoddard took second while Kenny Sadler was third. Mike Arick was top man in the 125 class, finishing ahead of Billy Weeks and Steve Shaffer. Mark Diefenbather collected lrst place in the 250 class. James Kirk was second and James Bowie third. Terry Shaffer finished first nn the open division. He was allowed by Hans Wilson in second and Rocky Halloway in third.