The infield section was still used for motorcycle racing at the track until about 2000 as the high speed esses (turns 6–9) at the end of the back straight were deemed too dangerous for the bikes at high speed (the entry speed off the straight was close to 200 km/h (124 mph)) with very little runoff area between the track and the outside fence. Using the infield section not only bypassed the esses but slowed the bikes down and allowed them to continue using the circuit for the series such as the Australian Superbike Championship.