Brno will not stage a round of the World Superbike Championship for the first time in ten years this season following apparent economic disagreements with promoters.

The Czech Republic round had been one of the most popular with riders and punters alike but will now not take place. The calender has now been shuffled around with Motorland Aragon going back a week, so it now doesn't clash with the MotoGP opener at Losail.

The controversial Monza round remains on the schedule while Portimao and Imola are both subject to contract. There is still a space on June 23.

2013 Provisional World Superbike calendar V2.7:

24/02: Phillip Island (Australia)

10/03: Buddh Circuit (India)

14/04: Motorland Aragon (Spain)

28/04: Assen (Netherlands)

12/05: Monza (Italy)

26/05: Donington Park (Great Britain)

09/06: Portimao (Portugal)

23/06: TBA

30/06: Imola (Italy)

21/07: Moscow (Russia)

04/08: Silverstone (Great Britain)

01/09: Nurburgring (Germany)

29/09: Laguna Seca (USA)

06/10: Magny-Cours (France)

20/10: Jerez (Spain)