The combined 400cc and 125cc race, held over from last night, closed out this morning's race schedule at the Southern 100.
Alistair Howarth led from start to finish to take the 400cc win.
Dave Madsen-Mygdal battled his way up the field to take second and Peter Simpson was third.
In the Station Garage sponsored 125cc race Castletown's Chris Palmer emerged victorious; Ian Lougher then Nigel Moore the runners-up in the lightweight class.
Football: Railway Cup hopefuls all maintain pace in premier league
Castletown stay four points clear atop Division 2
Rugby: Vagabonds Ladies stay top with another victory
Vagabonds men and Douglas also take respective wins on home soil
Hockey: Harlequins A beat rivals to close in on prem leaders
Bacchas B take important victory in battle for top-flight safety
FC Isle of Man torn apart at Barnoldswick Town
It's the Manx side's heaviest ever league defeat
