Whatever transpires, it will again take a special individual to claim the top prize at the Tar Hill forestry venue, off State Highway 1, about 11km south of Tokoroa on Sunday.
Former national dirt bike champions Jake Whitaker, from Wainuiomata, and Seth Reardon, from Whanganui, are a couple of riders who fit the bill.
Whitaker won the New Zealand Extreme Off-Road Championships last year and Reardon was national enduro champion in 2019.
However, they can take nothing for granted with Cambridge's Dylan Yearbury always a threat and he is definitely on form, an impressive overall winner of the elite gold section of the Schist Enduro-X near Wanaka over Easter Weekend.
Palmerston North's former United States cross-country champion Paul Whibley, Helensville's Tom Buxton and Rotorua's Ethan Harris could also be title contenders.
Harris finished overall runner-up in the MX1 class at the New Zealand MX TT Nationals near Huntly over the Easter Weekend.
Others to watch out for include Oparau's national MX2 motocross No.2 James Scott, Thames rider Natasha Cairns, Drury's Richard Sutton, Tokoroa's Jake Wightman, Stratford's Josh Hunger, Rotorua's Bradley Lauder and New Plymouth veteran Tony Parker, to name just a few.
"It's great to be virtually Covid-free here in New Zealand and to start off this series with an event run by Sean Clarke," Motorcycling New Zealand enduro commissioner Justin Stevenson said.
"Sean always puts on great events and riding conditions should be ideal."
Event organiser Clarke said the forestry tracks at Tar Hill had not been used in about five years so "the trails will be quite fresh ... although also quite slippery".
"There will be about 120km of riding, including five special tests," Clarke said.
"There will be good spectator viewing for the special tests, set up close to the pit area."
The 2021 Yamaha NZ Enduro Championships are supported by Mitas tyres Macaulay Metals, Best Build Construction, Silver-bullet and Kiwi Rider magazine.
2021 New Zealand Enduro Championships calendar
Round 1:
Saturday, April 11 – Tokoroa.
Round 2: Saturday and Sunday, April 24-25 – Marlborough.
Round 3: Saturday and Sunday June 5-6 – Moonshine, Kapi-Mana.
Round 4: Saturday, June 12 – Masterton.
Round 5: Sunday, June 13 – Martinborough.