"Guys over there had been telling us we may have got our suspension set-up wrong for Phillip Island, so we changed it quite a bit," Dibben said.
"It definitely felt better, but took a while getting used to it. I also had some ****ty starts which didn't help. But, hey, to come away with a top-five finish against those guys is not too bad."
The Phillip Island round was the penultimate round where series leader Tom Toparis was given the title after race one on Sunday.
Toparis, who has been racing in supersport series on three continents this season, including Europe, had posted an unassailable lead and his all the way win in race one delivered the national title to his Yamaha factory team.
Dibben, one of the few privately-sponsored riders, had qualified eighth and all bikes ahead of him on the grid were Yamahas.
"It was a pretty strong field all right, but now we appear to have this suspension right we are keen to take on the final round in Sydney next month. The Sydney track is also a wide open, fast track, so should suit us," Dibben said.