Fairbrother said he had been paired against Australian Stephen Leedbruggen and three times took first place against his rival from four outings.
The Kiwi team chalked up 204 points over the course of the challenge against an Australian total of 187 points and Victorian racer Michael Dibb took the Barry Sheene Memorial.
Fairbrother, who had last year finished third overall at the annual meet, said he had this year clocked some of his best lap times at the memorial in the decade since racing ace Sheene had died.
"It was some of the best lap times I've ever done and there were no problems with the bike. It was well worth the trip."
Fairbrother will next race this weekend at the annual Gladstone Cliffhanger, of which he is a co-founder, during a lead-up to his fifth bid, aboard a 1971 BSA Rocket 3, at the Isle of Man.
As part of his build-up to the Manx Grand Prix in August, Fairbrother has already raced since early February at the 2013 Sound of Thunder meet at the Powerbuilt Raceway in Christchurch, the Paeroa Battle of the Streets and at Hampton Downs Motorsport Park near Hamilton.