Many of the competitors machines in New South Wales have reached a new level in mechanical performance and presentation.
In New Zealand the rules have developed slightly different classing of bikes with the maximum engine size in Formula 4; two strokes up to 100 cc water-cooled or 125 cc air-cooled and 4-strokes up to 150 cc water-cooled and Formula 5; 50 cc 2-strokes and 100 cc 4-strokes.