William Dunlop took victory in the opening race of the Manx Telecom Post TT at Billown.
He finished ahead of Castletown’s Chris Palmer with French debutant Steve Cervellin third in the 125cc event.
Meanwhile, Blackpool’s Roy Richardson took the honours in the 400cc class and dedicated his victory to New Zealander Paul Dobbs.
Dobbs, a winner of this event in previous years, had been due to ride again until his death two days ago after an accident at Ballagarey.
Ross Johnson was second home with Peter Simpson completing the line-up for the podium.
Dunlop admitted he was expecting a closer battle.
Roads at Billown to close this morning as Southern 100 continues
Enduro: Jed Etchells storms to victory on home soil
Dean Harrison sets the pace in opening S100 qualifying
Paynel and Mahdzan win WDSC Isle of Man round