Latest pictures from the Sepang MotoGP test, the first track action of the 2013 season, which began on Sunday for privateer CRTs using the standard ECU.

The main three-day test - for all competitors - gets underway at the Malaysian circuit on Tuesday morning, so while the CRTs rode some soggy Monday laps the manufacturer teams were setting up camp and preparing their machinery.

During that process, the latest test livery of Valentino Rossi's Yamaha was revealed (pictured) plus the latest Bridgestone tyre markings.

CLICK HERE to see the pictures, which will be updated throughout the week...