New South Wales rider Anthony Gunter bounced back from injury in 1980 to take victory in the premiere 500cc class – securing his third Australian Championship.
The flat Symmons Plains circuit would have made conditions easier on his body and he comfortably won on his 500cc Kawasaki machine, although he was pressured early by Stephen Gall (NSW, Yamaha). Gall was forced to withdraw in the first leg due to mechanical problems and Trevor Williams (VIC, Kawasaki) finished second overall with Robert Bailey (NSW, Suzuki) in third.
Earlier on the day Gall retained his crown in the 250cc class having won his first title in this class at Dargle in New South Wales the year before. Ray Vandenburg (VIC, Suzuki) was second ahead of Neville Cutts (WA, Honda) in third. South Australian rider Darryl Willoughby (Yamaha) was well out in front in the first leg, but was fell when lapping a slower rider and dislocated his shoulder.
On the Saturday, Jeff Leisk broke through to win his first senior Australian Championship in the 125cc class. Riding a Honda, the young Western Australian was in his first year of senior competition and beat Trevor Williams (VIC, Kawasaki) and Trevor Brooks (VIC, Honda).
This was Leisk’s third Motorcycling Australia National Championship in successive years – having won the Restricted License Holder class at Wanneroo (WA, 1979) and Dargle (NSW, 1980).