Simon Skillicorn won Saturday's Glen Mona Horse shoe by over four minutes.
Tom Cringle, who is his nearest rival in the league this year, was second, and Ian Gale was third.
Cal Partington claimed the women's race ahead of last year's winner Rose Hooton. Bridget Kaneen was third.
Clerk of the Course explains 'difficult' decision to cancel Senior race
Finale to 2025 racing fortnight was called off this evening (7 June)
TT 2025: Paul Jordan responds to being awarded Supertwin podium
Rider given top-three finish after Michael Evans' disqualification
2025 Senior TT Race cancelled
Only second time in history race has been called off when meeting has taken place
TT 2025: Michael Rutter transferred to Walton Centre
Rider reported as 'stable, conscious and talking' after Supertwin race incident