Raymond Porter had three second place finishes at Kells

The Australian rider won the Supersport 600 and Open races before clinching victory ahead of Raymond Porter and Martin Finnegan in the Grand Final.

Donald bettered his own record in the Open event at 111.94mph.

William Dunlop won the 250 race from his brother Michael while Darren Lindsay edged out Robert Dunlop and Mark Curtin in the 125 class.

Donegal rider Porter was also second to Donald in the Supersport and Open races.