Mead had switched bikes, jumping from a 250cc Yamaha to a 450cc Yamaha after the opening round and, because he had abandoned his 250cc class attempt and converted to the bigger bike after the competition had already started, he was one round behind in the chase for 450cc class honours.
As it turned out, Mead's overall win on Saturday not only confirmed his win ahead of Power for the series title outright but also gave him the over-300cc four-stroke title for the year as his performance on Saturday snatched that crown away from Tauranga's Reece Burgess (Husaberg), the rider who had led the class from round one in January.
"It was a pretty trouble-free run today. I did have a couple of high-speed get-offs but nothing major," said Mead.
"I won outright in 2009 and to win it outright again this season is very special too."
Power was philosophical in defeat.
"It would have been nice to win outright but Rory would have to have not finished on Saturday for me to beat him. But still, I am satisfied ... I wrapped up the under-300cc four-stroke class win with a round to spare."
Other class winners this season were Hokianga's Mitchell Nield (Hokianga, Gas Gas), under-200cc two-stroke class; Auckland's Michael Skinner (KTM), over-200cc two-stroke class and Tokoroa's Sean Clarke (Yamaha) veterans' (over 40) class.