The following weekend Rountree will be flying to Adelaide, Australia to race at Murray Bridge in the Australian MXD class on a YZF250. This class is for under 19-year-old riders and he will be one of the youngest in the class.
"This class is a lot faster than what I have currently being riding," Rountree said.
"I'm just mostly going over for the experience and see how I go. I raced a few of the guys at the Aussie junior nationals last October and if I finished in the top 20 I would be happy.
"Josh Coppins from Yamaha NZ has helped me with getting a bike etc and that's helped a lot, but first thing is this weekend, that's what I'm focusing on at present. My fitness is good and I'm ready to go."
While the meeting this weekend is Rountree's final fling at junior national level, there are junior ranked races he may contest down south around Queen's Birthday a week before he turns 17.
Meanwhile, other Whanganui riders racing this weekend at the NZ juniors are Jet Ashworth, Jamie Bennett, Troy Bullock, Alex Luff Scott, Chase Williamson, Finn Lennox and Ajah Sullivan.
Racing starts on Friday and finishes on Sunday.