Other riders to watch out for this weekend include Nield's younger brother Damon (Husqvarna), Power's cousin, Chris Power (Honda), from Auckland, and Auckland foursome: Sam Greenslade (Husqvarna), Michael Skinner (KTM), Callan May (Yamaha) and Caleb van Dragt (KTM).
Taranaki's Dougy Herbert (KTM) and Thames rider Shaun Prescott (Husaberg) could also impress.
In addition to outright honours, the riders are vying for individual bike class honours on Saturday.
Burgess narrowly leads the battle for the over-300cc four-stroke class title, Skinner heads the over-200cc two-stroke class, Mitchell Nield is on top of the under-200cc two-stroke class, Karl Power heads the under-300cc four-stroke division and Tokoroa's Shaun Clarke (Yamaha) heads the veterans' (over-40) category.
A slip-up by any of these front-runners could see a different winner named.
The venue is just off State Highway 5, the Taupo/Rotorua highway, just north of Wairakei.