The Australian Superbike calendar has been leaked, again commencing at the Phillip Island WSBK round. Image: Keith Muir.

The 2011 Australian Superbike Championship calendar has been leaked from members within Motorcycling Australia and series promoter International Entertainment Group.

Rival series promoter Formula Xtreme posted the information on its website on Saturday evening to reveal the series’ structure for 2011, despite various attempts from media outlets to gain information on the series in recent weeks.

While the calendar was originally promised a number of weeks ago, next years calendar broke on the FX site via a leaked document signed by new IEG general manager Daniel Hutchinson.

The calendar will see the series again commence at Phillip Island’s World Superbike round in February before wrapping up in November with a standalone event at the same venue.

In between, the series will host standalone events at Symmons Plains, Hidden Valley and Queensland Raceway, also continuing its formation with the V8 Supercars by hosting two-plus-four events at Barbagallo, Queensland Raceway and Symmons Plains.

The addition of Barbagallo marks a return for the series to Western Australia, however it will be a Superbike/Pro Stock-only event. The Supersport category has been dropped from the two-plus-four rounds for 2010.

Eastern Creek has again been left off the 2011 calendar, the series failing to visit New South Wales for the second season in succession.

Similar to 2010, the WSBK round will feature Superbike, Pro Stock, Supersport and Superstock 600. All standalone events will feature the regular two-wheel categories.

According to the document, the class structure for 2011 will feature Superbikes, Supersport, Pro Stock (formerly Superstock 1000), Superstock 600, Lites (formerly 125cc GP and 250-Mono GP), Superside (formerly Sidecars), Supermoto and the Aussie Racing Cars again included at selected rounds of the series.

A new Historic Masters category is also to be introduced at select rounds. Those events, as well as the Superside, Supermoto and Aussie Racing Cars events, will be detailed “shortly”.

With just over two months remaining before the 2011 season is scheduled to commence, no official the calendar has been released by IEG at the time of MotoOnline.com.au’s posting.

Update: IEG released its official calendar this afternoon, confirming the information leaked to FX two days before the media is correct.

2011 Australian Superbike Championship Calendar
Rd1 25-27 February Phillip Island, VIC (World SBK)
Rd2 4-6 March Symmons Plains, TAS (standalone)
Rd3 14-17 April Hidden Valley, NT (standalone)
Rd4 6-8 May Barbagallo, WA (V8 Supercars)
Rd5 3-5 June Queensland Raceway, QLD (standalone)
Rd6 19-21 August Queensland Raceway, QLD (V8 Supercars)
Rd7 11-13 November Symmons Plains, TAS (V8 Supercars)
Rd8 18-20 November Phillip Island, VIC (standalone)