Host Pukekohe Motorcycle Club president Scott Wilkins sasys the event is a long time coming, after starting planning over a year ago.
"A huge amount of work has gone in behind the scenes but now I'm pleased to report it's all happening.
"Riders from both countries get to raise the bar because it's a chance for these young riders from both New Zealand and Australian to taste some international competition."
Australia won the Oceania Motocross title when it was last raced, in Australia in 2008.
Australian team manager Mark Willingham said that a strong team has been selected and he’s keen to take on the Kiwis.
"We went through a list from riders who took part in the World Junior selections last year as well as examining results from the Australian Junior Motocross Championships at Newry.
"The opportunity for some of our younger riders to step up and experience what will end up being a huge event will be awesome for them," he said.
"The Oceania competition between our two countries has struggled over the last couple of years, but New Zealand has put in a massive effort this year.
"The event will be using the World Junior Championship classes to pit our countries against one another in what promises to be another fierce battle, while also promoting the development of junior riders for both countries.
"I am really looking forward to the rivalry, and have no doubt the trip will be a success."