Aprilia Allowed to use Gear-Driven Camshaft in World SBK | Road Racer X

Aprilia Allowed to use Gear-Driven Camshaft in World SBK | Road Racer X: "clarification for the regulations was included in the circular sent by the SBK Championship race organisers to teams and constructors on Sunday 28 March, after the Portimao race, the same day as the historic double victory by Max Biaggi and the Aprilia RSV4."