Cameron Donald continued his excellent early-season form by winning both Superbike races and the two Supersport events at Kirkistown on Easter Monday.
Donald came home ahead of Kirk Jamison in both Superbike races, with Gary Jeffers and Alastair Kirk taking runners-up finishes in the Supersports.
Kori McGreevy won both 125cc races from Paul Robinson and Marty Lennon won both Supertwins events.
Mark Kelly and Richard Glasgow were the 250cc winners.
Australian Donald had won all six races in which he competed at the opening round of the Irish championship at Bishopscourt.
William Dunlop was in impressive form ahead of this weekend's Cookstown 100.
The elder of the Dunlop brothers secured two third places in the Supersport class and a fourth and fifth place finishes in Superbikes.
Michael Dunlop was third and fourth in the two Superbike races.