From here:

Australian Superbike and Motocross Championship calendars curtailed

Following discussions between Motorcycling Australia (MA), Event
Promoters and Industry Representatives a number of changes have
been made to the 2009 Australian Championship Calendar.
Several changes have been made to both the Australian Motocross
Championship and the Australian Superbike Championship Series’
and the new dates and venues are listed below:

Australian Motocross Championship:
Round 1: 5 April 2009, Wodonga, VIC
Round 2: 18-19 April 2009, Canberra ACT
Round 3: 17 May 2009, Toowoomba QLD
Round 4: 24 May 2009, Mackay QLD
Round 5: 14 June 2009, Murray Bridge SA
Round 6: 21 June 2009, Wanneroo WA
Round 7: 26 July 2009, Lakes NSW
Round 8: 1-2 August 2009, Coolum QLD

Australian Superbike Championship
Round 1: 27 February - 1 March 2009, (WSBK) Phillip Island VIC
Round 2: 4-5 April 2009, Symmons Plains TAS
Round 3: 5-7 June 2009, Queensland Raceway QLD
Round 4: 7-9 August 2009, Eastern Creek NSW
Round 5: 29-30 August 2009, Mallala SA
Round 6: 15-18 October 2009, (MotoGP) Phillip Island VIC
Round 7: 13-15 November 2009, Calder Park VIC

MA’s CEO, David White said that while the decision to omit some
rounds of each Championship was difficult, it was necessary to
safeguard the sport in these uncertain times.

“While we have, so far, avoided the significant economic turmoil
that others currently face, we cannot assume security in these
difficult times,” White said.

“We must look at ways to safeguard our sport, and, following
discussions with Industry Representatives and Event Promoters,
hope that this has been achieved for both the 2009 Motocross and
Superbike Championships.”