The winner will be awarded the trophy on the podium immediately after the race by the Shirriffs family and by Roddy Shirriffs' best friend from those days, Palmerston North businessman and former national motocross champion Phil Turnbull.
"I would love to defend my Roddy Shirriffs title. That's the aim anyway," said Knight, 17, who will race his CMR Red Bull KTM SX125 bike.
"I expect it won't be easy though. I know I'll have a fight on my hands beating [Te Puke's] Logan Blackburn, and I reckon Tauranga's Aaron Wiltshire, Christchurch's Dylan Walsh and Hamilton's Josiah Natzke will be tough to beat too." With only 125cc and MX2 bikes in the race, it will allow the Roddy Shirriffs Memorial Trophy contenders to really lock handlebars and should make the race exciting for spectators too.
The Roddy Shirriffs Memorial Trophy race is just one of more than 40 races on the programme for the two-day event.
This year's 53rd annual event will again attract the cream of New Zealand's motocross talent, as well as several competitors from overseas.
Manawatu rider Roddy Shirriffs was only 21 when he died while racing at the famous Devil's Drop motocross track at Wanganui in 1976. It was later discovered that his spark plug lead had come loose just as he powered off the jump.