The final day of racing at the Southern 100 opened with the 600cc B race, where Paul Smyth took a dominante 21 second win from fellow Yamaha rider Andy Fenton, who had been locked in a thrilling battle with David Kennington on his 599cc TMM Yamaha, with Fenton taking the flag just 0.03 seconds ahead.
In the S&S Motors 600cc race, Michael Dunlop's record-breaking pace gave him a 3 second margin over brother William, with Farquhar third – a further 26 seconds back – and Donald fourth.
In the combined 250cc/650cc race, it was Hondas all the way as William Dunlop once again battled with Manxman Chris Palmer for the 250cc honours, eventually taking the flag 2.3 seconds ahead, with Dan Sayle in third. Farquhar was almost a minute down on the leaders on his 650cc KMR Kawasaki and only took the class win by 2 seconds from the charging Roy Richardson on his 650cc Morrissey Special.
The combined 125cc/400cc race was stopped on lap four because of oil on the raod, and the result declared based on the times at the end of lap three. That saw 400cc Yamaha-mounted Alistair Haworth take victory by 7 seconds from Dave Moffitt on his Honda. In the 125cc class, Manxman Palmer took the honours by just 0.4 from arch-rival William Dunlop.
The Sidecar Championship race, held between the two legs of the Solo Championship, was an absolute thriller, with former World Champion Klaus Klaffenbock, once again partnered by Dan Sayle, the passenger who guided him to two TT wins, taking victory. It was Klaffi's second win of the week, but at the end of eight laps his margin of victory over the second-placed 600cc LCR Yamaha outfit of Ian and Carl Bell was just 2.2 seconds, with Simon Neary/Jason Slous only a further second back.