Kamo coach Owen Liiv said it was just what the team had planned since Kerikeri held them to a draw in Whangarei in the first round, the only time they dropped points in the entire competition.
"I'm so stoked with the lads, we talked about it before the game; how if we could beat Kerikeri then we would be real champions and not just scrape through on goal difference," he said.
The win underlined their dominance and inflicted the first home defeat on Kerikeri since June 2014.
Mark Roberts said the loss was a bitter pill for Kerikeri.
"It was hard to accept and the boys were a bit down in the sheds afterwards but we've still got two cups (competitions) to go at, so that's our motivation now," he said.
"We were doing alright until halftime and then let our foot off the pedal and Kamo took their chances and deserved their win. We were beaten by a better team today."
Kerikeri are still in the hunt for some silverware for the season. They are in the Federation One Cup final against either Glen Eden or Albany on September 3 at North Harbour Stadium and next week take on Central Brown in the Stafford Choat quarterfinals.
Kamo also have a tough proposition in next week's knockout round with an away trip to giant-killers Kaikohe. Although the premier league champions will go in as overwhelming favourites against the third division champions, Kaikohe have pulled off two big upsets already in the competition and will be looking forward to the challenge.
In division one matches, Kamo Reserves kept their title hopes on track with a 6-0 win over Onerahi Reserves. Onerahi New upset Madhatters Blue 4-2, Kerikeri Jerkovich beat Tikipunga Orange 3-1 while FC Whangarei edged Bream Bay Reserves 3-2 at Ruakaka.
