In the 650 twins Ryan Farquhar got off to a flyer, led at Balladoole and kept it that way to the finish seven laps later.
Wayne Hamilton and Ian Lougher made up the other two podium places.
In the 250 race Chris Palmer, fresh from his 125 win took the early lead from William Dunlop and Phil Harvey.
Mechanical troubles put an end to Palmer's race on lap 2 letting Dunlop through to first place.
The Ballymoney man guided the 250 to a well deserved class win. Tom Snow was in second place and Dave Milling third.
FC Isle of Man back on travels for Longridge Town test
Hockey: League titles and relegations could be decided this weekend
Rugby: Douglas hoping to maintain high standing at Firwood Waterloo
Football: Laxey and Onchan out to secure Railway Cup spots
Dominic Herbertson joins KTS Racing for 2026