Max Biaggi will make his debut on the Aprilia RSV4, which he will race in the 2009 World Superbike Championship, during a private test on Tuesday and Wednesday at Valencia.

The Roman has been given permission to test for his future team by current employer Sterilgarda Ducati, but is unable to publically comment on the new V4-powered machine until after the conclusion of the 2008 season, at Portimao on November 2.

"[Tuesday] will be my debut on the Aprilia," Max wrote on his official website. "I want to say thanks to my Sterilgarda Team that has approved this test before the end of the Championship. Thank you!

"I write you these few lines to tell you that I cannot make any declaration regarding the test, so you will have to wait the end of the championship.

"We will be on track for two days and then I will come back home waiting for the last GP of the year in Portugal. The tests will immediately continue in Portimao after the race and in particular 4th and 5th of November."

Biaggi sits sixth in the 2008 WSBK standings heading into the season finale. The Italian's 2009 Aprilia team-mate is still to be announced.