Perth Motorplex is a motorsport venue located at Kwinana Beach, Western Australia. It caters mainly for drag racing and speedway, although other events are held there regularly. Over 275,000 patrons attend the venue each year to many varied events. The Perth Motorplex holds rounds of the International Hot Rod Association Australia 400 Thunder Drag Racing Series and World Series Sprintcars championship.
Perth Motorplex (formerly Quit Motorplex) opened in 2000. It replaced the Claremont Speedway which was run at the Claremont Showgrounds from 1927, and the Ravenswood Raceway Drag Racing strip. Many Claremont loyalists were unhappy with the change saying it destroyed almost 75 years of heritage as were many Ravenswood fans. Nonetheless the changes suited a growing population in Perth as the racetrack at Claremont was situated literally across the road from housing estates. Also, the owners of the Showgrounds, the Royal Agricultural Society of Western Australia, while not wishing to lose their long time tenant, wanted to re-develop the main arena, which doubled as the speedway, into a fully grassed oval suitable for the Perth Royal Show and other outdoor festivals and concerts as well as for sports such as Australian rules football and cricket.
The Motorplex actually brought drag racing some 45 km closer to Perth than Ravenswood, while for speedway fans the Motorplex saw the sport leave the city and move 26 km south.
In the West Aussie tradition of having longer tracks than most of those in Australia, the Motorplex Speedway is a ⅓ mile, 500 metres (550 yards) dirt oval (Claremont was 586 metres (641 yards) in length), and since its opening has hosted the Australian Sprintcar, Speedcar and Super Sedan Championships, as well as regularly hosting rounds of the World Series Sprintcars and Speedcar Pro Series. It also hosts various Western Australian state championship meetings.