she became the sport's first female class winner.

In the penultimate event of the Pepsi National Motocross Championships, Munro wrapped up victory in the 80cc Modified Class.

Zahkie Iris, meanwhile, became the second KTM rider to win the 50cc class as he enjoyed a hat-trick of wins over the improving Chad Sutherland.

Garry Cann was triumphant in the 60cc class with three firsts while Jonte Smith placed second with two seconds and a third following a close battle with Zahkie McIntosh.

Cann's closest challenger, Tullio Escolastica, finished fourth in the first moto but a broken bike frame prevented him from competing in the next two races.

Cann also won the 80cc class with a hat-trick of wins over the present 80cc number one, Aaron Cannonier. He had to settle for three seconds while Loronzo Burch finished third.

Treadwell Nesbitt, the points leader in the 125C class, sat out Sunday's races as Jimmy Lee Weaver stepped up to take three wins which kept him in third place overall. Craig Panchaud had three seconds and is now 45 points behind Nesbitt, while Cavon Perinchief and Graham Sutherland placed third and fourth.

There was drama in the 125B class even before the races began. Points leader Jamel Pitcher, who suffered a hand injury in the previous week's racing, could see his championship hopes slipping away.

But Pitcher's main challenger, Wentworth Tucker, then saw his chance to close the gap quickly disappear as, by a cruel twist of fate, his bike seized in practice and he was unable to compete.

Pitcher eased round the track for 22 important points from two fourths and a fifth.

Otis Ingham took on Ali Hatherley, Carlston Burgess and Aaron Pace and came away with a hat-trick of wins. Hatherley finished second with three thirds and Pace third with two seconds and a fifth.