Black Bean and Milestone have announced the arrival of a demo for the motorcycle simulator X SBK - Superbike world championship. The content will be available on Marketplace early as tomorrow and will, once the download, try the Arcade Mode and Simulation on the two tracks of Valencia and Portimao. The demo will also compete in multiplayer sessions to 15 concurrent users via the Xbox Live service in three different categories of races: Supersport Superstock and Superbike.