It took just 29 seconds for Kaikorai to score in its 14-try hammering of Zingari-Richmond at Bishopscourt.
Centre Marshall Suckling was a key figure as Pirates gained its fourth win from five matches when it defeated Kaikorai at Hancock Park.
The strong Kaikorai defence restricted Harbour to nine points in the first spell and then took control after the break in difficult conditions at Watson Park.
The powerful University A pack dominated the set-pieces and set the platform for its decisive semifinal win.
Captain Cameron Rutherford was a controlling influence and his accurate goal-kicking was invaluable as Kaikorai staved off a spirited challenge from Green Island at Bishopscourt.
Flanker Alando Soakai celebrated his 50th game for Kaikorai with an aggressive and winning display to help Kaikorai lift the Frank Cadman Memorial Trophy at Bathgate Park.
Alando Soakai and Fetu'u Vainikolo proved inspirational forces for Kaikorai as it continued its late run towards a semifinal spot with a big win over Pirates at Hancock Park.
Kaikorai kept its composure and gave a solid display to beat an ill-disciplined Harbour team at Bishopscourt.
An inspirational performance from captain Charlie O'Connell laid the foundation for Taieri's bonus-point victory at Bishopscourt.
Kaikorai's inside backs and loose forwards were key contributors to a convincing win over Harbour at Watson Park.
Luke Herden made the difference.
A late penalty goal by first five-eighth Cam Rutherford helped Kaikorai retain the Speights Challenge Shield when it beat Taieri 11-10 at Peter Johnstone Park on Thursday in the first round of Dunedin club rugby.
Lock Steve Green and fullback Mike Kerr had impressive games as Taieri scored seven tries to beat Kaikorai at Peter Johnstone Park.
Strong running centre Kurt Schrader had a lively games in the backs and scored two of Zingari-Richmond's three tries when it beat Kaikorai at Bishopscourt.
Willie Lawson kicked five penalty goals to give Kaikorai a win over a depleted Lawrence team that had lost three key players to Otago.
Kaikorai played the percentages and used the conditions better to edge Green Island at Miller Park.
The rampaging Kaikorai No 8 Kensak Palepoi scored two tries and played a key role in the 19-9 win over Taieri at Peter Johnstone Park.
The Kaikorai pack paved the way for an upset win over competition leader University A in the Speight's Challenge Shield match at Bishopscourt.
Forget the scoreboard - underachieving Kaikorai dominated this game at Bishopscourt and deserved to lift the Speight's Challenge Shield from Harbour.
Kaikorai showed plenty of pluck and courage but Southern had that extra touch of class to claim a narrow win at Bishopscourt.