It sets up a great weekend of racing at The Rock FM Raceway, near Mamaku, during an historic event for KartSport Rotorua.
KartSport Rotorua's $3.5 million track was opened in March 2012 with the goal of hosting big national and international events.
The 2014 North Island Sprint Championships is the biggest event to be held at the new track to date.
Young driver Asten, who is a member of KartSport Rotorua despite living in Hamilton, said he was happy to win his first North Island title yesterday.
"I can't believe I came first, because those two are pretty much the best drivers in the world [for our class]," he said.
Going into the final corner he had not led during the race and was sitting in third place.
"I went on the outside and everyone else went on the inside."
Asten's entire family, including aunties and uncles, were on hand to congratulate him after the race.
Despite the close winning margin, he said he knew he had won the race when he crossed the finish line.
Billy finished second and local boy Blake came third, after just losing the lead in the last couple of metres.
Other classes being contested on the day included Junior 100cc Yamaha, 125cc Rotax Max Junior and KZ2.
The North Island champs will continue today and tomorrow near Mamaku and locals are encouraged to go up and enjoy the racing on Amoore Rd.
About 190 drivers have entered the event this year, making it the biggest KartSport New Zealand event in about a decade.