Repsol Honda Teams Marc Mrquez has already thrown down the gauntlet for the 2013 as he has started off day one of the official Sepang test top by the mid-day point, with Yamaha Factory Racings Valentino Rossi and Dani Pedrosa close on his heels.

The promised rain stayed away as teams set out predominantly putting in track time to bed in their new or upgraded bikes. Mrquez, back on his RC213V for the third time now, has put in a significant number of laps with 42, as he continues to adapt to a MotoGP machine. This is seemingly going well, as at 3pm local time he lay top of the timesheet with a 2:01357. Teammate Dani Pedrosa was just over three tenths off in third.Yamaha, which has brought a new chassis and engine to the test to cure pumping and give better acceleration out of corners, got their first glimpse of Rossi back on the Japanese machine, with the Italian not disappointing with a time just over two-tenths off Mrquez in second. His teammate Jorge Lorenzo, who put in six fewer laps with 30, finished the morning fourth less than two tenths off Rossi.LCR Honda MotoGPs Stefan Bradl, who is running a RC213V with the same spec as the HRC team in Valencia last year, was fifth fastest, as he worked on electronics and suspension. His Nissin brakes, the only part to differ from the factory, will be worked on in the afternoon. He finished ahead of Go & Fun Honda Gresinis lvaro Bautista, who continues his quest to find the best set-up with his Showa suspension.Monster Yamaha Tech 3s Cal Crutchlow, also with a new chassis and engine from Yamaha was seventh, ahead of HRC test rider Kosuke Akiyoshi and Yamaha test rider Katsuyuki Nakasuga. Ducati Teams Nicky Hayden kicked off the teams new era by hitting the mid-day point in tenth, in front of Yamaha test rider Wataru Yoshikawa.Tech 3s rookie Bradley Smith was getting used to his machine, currently lapping in twelfth, around 2.3 seconds off Mrquezs pace, in front of Ducatis Andrea Dovizioso, and the Power Electronics Aspar Team of Aleix Espargar and Randy de Puniet. Pramac Teams Ben Spies put in a few hours on his new Ducati, although had to stop due to shoulder pain. He went one quicker than his teammate Andrea Iannone in 17th.HRC test rider Takumi Takahashi heads Cardion AB Motoracings Karel Abraham, Paul Bird Motorsports Yonny Hernandez, Avintia Blusens Hiroshi Aoyama and NGM Mobile Forward Racings Claudio Corti. MotoGP new boy Bryan Staring kicked off his morning with the Go & Fun Honda Gresini CRT bike in 23rd, ahead of other newcomer Lukas Pesek, who has the Came IodaRacing Project bike to himself all day. Avintias Hctor Barber continued work on electronics, while Paul Birds Michael Laverty put some laps in on the ART to get used to the tyres and carbon brakes. NGMs Colin Edwards was back of the field, having put in only 20 laps all morning.