Rossi's M1 in full battle gear debuted on Twitter today with a photo from the Sepang test. image by yamaha

Yamaha and Valentino Rossi blew the cover of the new Yamaha Factory Racing machine Monday, tweeting pictures of his M1 from the garage at Sepang.

The 2013 Yamaha factory bike is a clear departure from the primarily blue-and-white livery of the past five seasons. Yamaha's machine features an attractive silver-and-black paint job, with new sponsor Monster's name and logo prominent on the engine cover/fairing.