On 15-16 October 1988, Western Australian rider Jeff Leisk won all three classes at the 1988 Australian Motocross Championships at the Gum Valley circuit in Koumala, near Mackay in Northern Queensland.

At the time, Leisk became the second rider to achieve this feat after Gary Flood became the first to win all classes in 1969 at Saint Leonards in Tasmania.

Leisk was competing in the 1988 AMA Pro Championship in the US and, with a round of the 500cc World Championships being held in America, he  was given the opportunity to compete against the elite in the US Motocross Grand Prix.

And he grabbed the opportunity with both hands, winning the second moto and finishing third overall alongside World Champions Eric Geboers (Belgium) and David Thorpe (England).

From this performance, Leisk secured a lucrative contract with the Honda Factory Team for the coming 1989 500cc World Championships, which he ended up finishing second.

Just before his assault on the World Grand Prix circuit, Leisk returned briefly to Australia and contested all classes in the Australian Championships, which were hosted by the Mackay and Districts Motor Cycle Club.  Winning the Australian titles meant that he would boost his start money at international meetings in Europe.

Leisk last contested an Australian Motocross Championship in 1984 at Broadford in Victoria, winning 250cc title.  After securing both Mr Motocross titles in 1984 and 1985, Leisk headed to the United states to begin his international racing career.

In Mackay – in very hot and humid conditions in the middle of a sugar cane country – he beat Glen Bell (NSW, Honda) in both the 250 and 500cc classes, with Craig Dack (NSW Honda) and James Deakin (QLD, Yamaha) finishing third in these classes, respectively.

But in the 500cc class, Leisk actually tied on points with Bell – with both riders securing 1-2 finishes – with Leisk winning on a countback.