Summers also raced a Yamaha YZ450F throughout the series and had been a contender to win the Super Moto class again this season, until a crash at Manfeild's second round ruined his chances of outright victory.
Wanganui's Richard Dibben claimed the title with two victories at Cemetery Circuit, although Summers came runner-up to him on both occasions.
But with another Suzuki series class title in the books, Summers was not begrudging Dibben his success.
"Winning the 600cc class is a big one. It's a great way to set me up for the nationals when I will race the 600cc supersport class."
The four-round New Zealand Superbike Championships begins in Christchurch on January 5, and perhaps it could really be the summer of Summers.
"I'm not getting too excited about things just yet," he said.
"I don't know any of the South Island tracks," he said.
"I have never even set eyes on the tarmac down there yet, so it's going to be a bit of a learning experience for me.
"This Suzuki series was all about me getting comfortable on the Yamaha R6 and that's certainly starting to happen."