One day before the Supersport and Superbike classes had their chance to start testing at Valencia the Superstock riders made their last test before the start of the season at Donington Park on April 1. Claudio Corti showed the potential of the new 2007 YZF-R1, scoring the fastest lap of all and setting himself up well for the first round, while his team-mate Michele Pirro was an impressive fourth quickest, despite feeling that he still has a lot of learning to do in the Superstock class.